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PostPosted: 08 Jul 2016, 14:07 
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Joined: 01 Jul 2016, 14:25
Posts: 6
Location: Milwaukee, WI, USA
Hey laurie54,

thank you so much. I'll dig into the stepper motors story, always eager to learn new things. :)

And yes, the idea is to spin it both ways so all areas of the grooves are dealt with. It is a bit like with a rock in a stream, the side that is facing the stream is constantly clean, the one on the opposite side rather not being in the shadow of itself. So to speak... if you understand what I mean... :)

Cheers,

Erik

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I love vinyl. Projects:
- build a DIY RCM
- build some sandbox rests for the equipment
- build some bass traps and damping board to improve room accoustics


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PostPosted: 08 Jul 2016, 16:54 
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Joined: 09 Oct 2012, 19:43
Posts: 252
Location: Vancouver Canada
Yes i do understand. Cool and makes sense. Have you looked into or are you thinking of adding in a negative ion generator to cancel out the positive ion infusion induced when taking the record out of it's bag? I think the Zero-stat gun is still being sold by some for that reason. It would make a useful addition also if you can find an ion generator for room dust and partial reduction then mod it. I have seen lots over the years at garage sales etc. Add some high voltage signs etc to help keep fingers off and eyes wide. What kind of vacuum will you use? I have a friend who installed an industrial hood vent fan over his stove not knowing that on high it is capable of sucking a steak off the pan, chewing it up, and spitting it at the neighbors house next door. Scary contraption! So be forewarned.


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PostPosted: 09 Jul 2016, 08:10 
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Joined: 13 Feb 2013, 11:02
Posts: 38
Location: Canada
Sorry Laurie,
But it is not a stepper motor. It is just a simple brushless DC motor. The drive system does however look like an H-Bridge, but it is not.
Erik, download the service manual to the Sony PS-LX20 turntable. The drives are not quite identical but they are close enough. It looks like there is two distinct coil sets that need to be reversed. One wire from the motor of each coil should be ground, the other wire should go to a pair of drive transistors. Reversing these should reverse the motor. Make sure you have the correct pair of wires or the motor or drive will be damaged.
I tend to agree with Geek, the circuit doesn't look like it's going to provide enough torque. The parts are low current, low voltage, which means low power.

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Dan Santoni
DTS Audio Electronics
www.dtsaudioelectronics.com


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PostPosted: 12 Jul 2016, 13:43 
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Joined: 01 Jul 2016, 14:25
Posts: 6
Location: Milwaukee, WI, USA
Hello everyone,

sorry for the late reply. I was a tiny bit busy lately.

@Geek and blackdog: you are unfortunately right. The torque seem to be quite low. I'll have a test run today but am not very convinced. Now I am considering the alternative of simply buying a high torque dc motor with 30rpm from ebay (with a loading torque of 15kg/cm2) and a transformer 120 V to 12 V 3Amp. I hope that should fix the problem.

Thanks for all the help.

Cheers,

Erik

_________________
I love vinyl. Projects:
- build a DIY RCM
- build some sandbox rests for the equipment
- build some bass traps and damping board to improve room accoustics


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PostPosted: 14 Jul 2016, 17:49 
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Joined: 09 Oct 2012, 19:43
Posts: 252
Location: Vancouver Canada
Oki Doki. Thanks for clearing it up Blackdog. Sounds like the problem is being cleared up in one respect but another (torx) is rearing it's head. This is a unique subject so i am reading to the final outcome.


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PostPosted: 19 Feb 2017, 13:10 
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Joined: 19 Feb 2017, 13:05
Posts: 1
Hi Erik, Once you find a suitable electric motor for your record cleaner, please provide the model or Ebay link. I would like to know for my diy record cleaner. Also, please post pictures of your completed record cleaner.


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