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#41
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Well-Tempered Turntable
Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. errr, uhhhmmmm, make it larger. damn it's late.... |
#42
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Well-Tempered Turntable
"wß" wrote in news:9jGLb.106724$Dp5.29037
@fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half-twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r -- Nothing beats the bandwidth of a station wagon filled with DLT tapes. |
#43
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Well-Tempered Turntable
"wß" wrote in news:9jGLb.106724$Dp5.29037
@fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half-twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r -- Nothing beats the bandwidth of a station wagon filled with DLT tapes. |
#44
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Well-Tempered Turntable
"wß" wrote in news:9jGLb.106724$Dp5.29037
@fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half-twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r -- Nothing beats the bandwidth of a station wagon filled with DLT tapes. |
#45
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Well-Tempered Turntable
"wß" wrote in news:9jGLb.106724$Dp5.29037
@fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half-twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r -- Nothing beats the bandwidth of a station wagon filled with DLT tapes. |
#46
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Well-Tempered Turntable
Rich Andrews wrote:
"wß" wrote in news:9jGLb.106724$Dp5.29037 @fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... |
#47
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Well-Tempered Turntable
Rich Andrews wrote:
"wß" wrote in news:9jGLb.106724$Dp5.29037 @fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... |
#48
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Well-Tempered Turntable
Rich Andrews wrote:
"wß" wrote in news:9jGLb.106724$Dp5.29037 @fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... |
#49
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Well-Tempered Turntable
Rich Andrews wrote:
"wß" wrote in news:9jGLb.106724$Dp5.29037 @fe3.columbus.rr.com: "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... |
#50
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Well-Tempered Turntable
wß wrote:
Rich Andrews wrote: "wß" wrote in news:9jGLb.106724$Dp5.29037 : "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... Don't you just hate when that happens? g -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#51
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Well-Tempered Turntable
wß wrote:
Rich Andrews wrote: "wß" wrote in news:9jGLb.106724$Dp5.29037 : "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... Don't you just hate when that happens? g -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#52
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Well-Tempered Turntable
wß wrote:
Rich Andrews wrote: "wß" wrote in news:9jGLb.106724$Dp5.29037 : "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... Don't you just hate when that happens? g -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#53
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Well-Tempered Turntable
wß wrote:
Rich Andrews wrote: "wß" wrote in news:9jGLb.106724$Dp5.29037 : "chris berbaum" wrote: There's just the drive wheel attached directly to the motor shaft, with a slotted belt position for 33 rpm and one for 45 rpm, ... the belt then wraps around the outside of the platter. The platter bearing actually sits in a well of lubricant, so no problem there. I used a test record with an A=440 Hz tone, along a 12 TET scale, and a Peterson Virtual Strobe tuner that indicates of +/- cents of a semitone. I suppose the only thing to do is to try to find a replacement motor that I can test and then count on. It just a shame 'cause the table itself sounds great, and as long as there's no pitch reference around, I was able to "suspend disbelief". But now I know, .... appreciate the help, chris b. "Robert Gault" wrote in message ... chris berbaum wrote: Hello, I have a turntable called "Well-Tempered", and while it has an unusual design, and sounds quite nice, I've found that the belt-drive motor is about 25 cents flat/slow. There is no strobe or pitch adjustment, but the motor is actually separately mounted, and connected only by the half- twisted belt. Can I use a variac to increase the voltage to tune up the pitch? Thanks, chris b. Assuming the motor speed can't be adjusted, how is the belt connected to the motor? If there is a drive wheel or capstan which can be made slightly larger, the belt will move faster and the pitch will rise. What test was made of the speed that you are sure it is slow? Is there excessive friction anywhere in the system? Dried bearing lubricant for example. Assuming the speed is constant you could alter the size of the pully on the motor. Make it smaller to increase the speed. Don't you mean bigger? r my bad, yes, increase the diameter. wb - whose slip in logic will now live on forever thanks to Google.... Don't you just hate when that happens? g -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#54
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Well-Tempered Turntable
Alan Peterman wrote:
You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff |
#55
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Well-Tempered Turntable
Alan Peterman wrote:
You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff |
#56
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Well-Tempered Turntable
Alan Peterman wrote:
You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff |
#57
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Well-Tempered Turntable
Alan Peterman wrote:
You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff |
#58
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Well-Tempered Turntable
Geoff Wood wrote:
Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I don't recall whether the age of the turntable was given, but it's possible wear is a factor. -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#59
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Well-Tempered Turntable
Geoff Wood wrote:
Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I don't recall whether the age of the turntable was given, but it's possible wear is a factor. -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#60
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Well-Tempered Turntable
Geoff Wood wrote:
Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I don't recall whether the age of the turntable was given, but it's possible wear is a factor. -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#61
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Well-Tempered Turntable
Geoff Wood wrote:
Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I don't recall whether the age of the turntable was given, but it's possible wear is a factor. -- After being targeted with gigabytes of trash by the "SWEN" worm, I have concluded we must conceal our e-mail address. Our true address is the mirror image of what you see before the "@" symbol. It's a shame such steps are necessary. ...Charlie |
#62
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Well-Tempered Turntable
"Geoff Wood" wrote ...
Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. Lousy manufacturing QC Lose specs ("50 cents is close enough") |
#63
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Well-Tempered Turntable
"Geoff Wood" wrote ...
Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. Lousy manufacturing QC Lose specs ("50 cents is close enough") |
#64
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Well-Tempered Turntable
"Geoff Wood" wrote ...
Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. Lousy manufacturing QC Lose specs ("50 cents is close enough") |
#65
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Well-Tempered Turntable
"Geoff Wood" wrote ...
Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. Lousy manufacturing QC Lose specs ("50 cents is close enough") |
#66
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Well-Tempered Turntable
"Geoff Wood" -nospam wrote in message ... Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I would be suspicious of the belt. These stretch with age/use, which might reduce the tension, increasing slip. Regards Ian |
#67
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Well-Tempered Turntable
"Geoff Wood" -nospam wrote in message ... Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I would be suspicious of the belt. These stretch with age/use, which might reduce the tension, increasing slip. Regards Ian |
#68
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Well-Tempered Turntable
"Geoff Wood" -nospam wrote in message ... Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I would be suspicious of the belt. These stretch with age/use, which might reduce the tension, increasing slip. Regards Ian |
#69
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Well-Tempered Turntable
"Geoff Wood" -nospam wrote in message ... Alan Peterman wrote: You need a slightly larger diameter "drive wheel" to speed up the belt, and thusly the driven main turntable. Depending on the material you might be able to get the diameter a bit bigger by merely plating the "drive wheel" - which I usually call the capstan - with some paint. You could be REALLY scientific and accurately measure the diameter of the capstan, then figure that it needs to be enlarged by about 1.5% of the original diameter. Unless the design measurements were faulty originally, or it's a very cold day and the drive 'pulley' has shrunk (or the platter has expanded) there is something else wrong. The laws of physics haven't changed, so either: - the motor needs a lub - the belt is slipping - your mains frequency is off - It is not a synchronous motor but DC and the control electronics needs adjusting - your measurement equipment is out of calibration - something else I haven't thought of. geoff I would be suspicious of the belt. These stretch with age/use, which might reduce the tension, increasing slip. Regards Ian |
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