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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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jammed motors
Yesterday I went to clean some Command LPs from Scott Dorsey, and fix the
broken spindle on the record-cleaning machine (a Nitty-Gritty Mini-Pro 2). To my surprise, the motor was jammed. (I rarely listen to LPs, and haven't used the machine in some time.) Turning it with the power on freed it. I was just wondering... Other than the obvious (gunky grease), is there anything else that would cause a motor to jam? |
#2
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jammed motors
On 11/11/2014 15:13, William Sommerwerck wrote:
Yesterday I went to clean some Command LPs from Scott Dorsey, and fix the broken spindle on the record-cleaning machine (a Nitty-Gritty Mini-Pro 2). To my surprise, the motor was jammed. (I rarely listen to LPs, and haven't used the machine in some time.) Turning it with the power on freed it. I was just wondering... Other than the obvious (gunky grease), is there anything else that would cause a motor to jam? breaking up commutator if that sort, or a brush shifted out of alignment |
#3
Posted to sci.electronics.repair
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jammed motors
William Sommerwerck wrote:
Yesterday I went to clean some Command LPs from Scott Dorsey, and fix the broken spindle on the record-cleaning machine (a Nitty-Gritty Mini-Pro 2). To my surprise, the motor was jammed. (I rarely listen to LPs, and haven't used the machine in some time.) Turning it with the power on freed it. I was just wondering... Other than the obvious (gunky grease), is there anything else that would cause a motor to jam? worn bearings can cause the rotor on some motors to jam into place. I've had to add spacers to induction motors to get them to run again when the axial play becomes too great, and non-bearing surfaces start to rub. |
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