Who is interested in a groupbuy of Mark Kelly's DC controller PCB and related parts - Page 12 - diyAudio
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Old 28th April 2006, 09:50 AM   #111
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Default and a little something on the drive belt

Also got this from Brian Cherry via email.
Quote:
Another thing worth finding out about is how to fuse 1/4" mylar leadout tape it doesn't come apart. It makes the best belt and delivers the full stability of the motor. All the methods I've tried drift apart after a couple weeks 24/7 running. Second best is fused nylon thread if someone can do it. You could use 2 of them for a pretty good result.
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Old 28th April 2006, 09:56 AM   #112
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Default And this from the Teres site..

Quote:
A precision aluminum pulley was custom machined for the Teres as off the shelf pulleys are generally not of sufficient quality for this application. The pulley is superbly concentric with a run-out spec of less than two ten-thousandths. To retain the near perfect concentricity the pulley has a friction fit on the shaft and no set-screw is used.
Who knows where Teres got theirs made ?
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Old 28th April 2006, 10:11 AM   #113
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Quote:
Originally posted by Lord Dubious

2. What would be the heaviest platter that the motor/controller could reliably turn without undue strain?

Cheers
Because the DC motor torque increases when it slows down it can turn virtually any platter. The greatest effect of extra platter mass is that the run up time increases - if you went to a platter of more than 10 kg you might be waiting a couple of minutes for it to run up to speed.

BTW from what I've seen of Vinyl Addict's work if anyone can make the pulley properly he can.
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Old 28th April 2006, 10:24 AM   #114
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Also from an email by Brian Cherry.

Quote:
One point about pulley material: it is important! I had samples of brass, aluminum and delrin made up.
The Delrin is easy to press fit and use but compared to the metal pulleys was lacking.
The aluminum was good in that it is very light so any run out creates less vibration at the motor. However it rings and does affect the sound.
Brass is deadest and sounds the best. Only problem is a little bit of run out can be noticed as vibration on the motor due to its higher mass. However it does make it easy to sort out the unacceptable pulleys.
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Old 28th April 2006, 10:26 AM   #115
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Quote:
BTW from what I've seen of Vinyl Addict's work if anyone can make the pulley properly he can.
Sounds good. But would you like to make 25 or so pulley's Vinyl Addict?
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Old 28th April 2006, 01:16 PM   #116
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Put me for the "deluxe version" of the Pcb + pulley + motor (is it the Maxon 110191?)

Thanks
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Old 28th April 2006, 01:33 PM   #117
robbie is offline robbie  United Kingdom
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Default am I too late

Hi All
am I too late to join this?

but before I send any money can I check some things.
am trying to upgradee my PTTOO using the ironless motor from permotec (rs no - 432-9765 ) but have been using a very simple variable voltage circuit.
will this kit work with this motor?

thanks
Rob
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Try anything twice - just to make sure
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Old 28th April 2006, 01:51 PM   #118
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Quote:
Originally posted by audiofilo123
Put me for the "deluxe version" of the Pcb + pulley + motor (is it the Maxon 110191?)

Thanks

Check earlier postings and do email-ordering.
So far I have recieved 1. ( of at least 20 cadidates )

Thanks.

hk
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Old 28th April 2006, 02:06 PM   #119
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Default No need to give your name. Just follow these steps if you want to buy.

I'm collecting the paypal email addresses for Mark Kelly.
The MK groupbuy is for pcb and if you want, the parts as well.

PCB:20 us$
PARTS:80 us$

In the header of your email please put "Mark Kelly Controller"
Please send me your

DiyAudio username:
Paypal address:
Amount of PCB:
Sets of parts to populate the PCB's:

Once I've got them all together I'll forward the data to Mark Kelly.
So I'm collecting the email address...and Mark will send a payment request and handle shipping etc..

*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
superhkm HANDLES THE MOTOR GROUPBUY..so please send your motor orders to him

The Motor Is Maxon 110191
Shipping included:

USA: 115us$
EUROPE: 106us$

You may notice that I put on an extra $2 , this is because I forgot I have to pay to get the motors shipped to me.

In the header of your email please put "Groupbuy Motor"
Please send me your

DiyAudio username:
Paypal address:
Number of motors
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
The pulley GB is uncertain at this moment.
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Old 28th April 2006, 05:41 PM   #120
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Default Re: And this from the Teres site..

Quote:
Originally posted by Bas Horneman


Who knows where Teres got theirs made ?
In the beginning they did press fit the pulleys but have also used set screws because I read a thread somewhere recently that stated that. I don't know what they currently use.
Press fitting or line to line fit may offer a very slight benefit in concentricity over a snug fit with set screws but if carefully made there should be no problem.
Anytime I make pulleys I bore the hole which is a bit of a challenge since it is only slightly under 3mm diameter but that yields the best concentricity results.
Keep in mind too that there is already 0.1mm - 0.2mm axial play on the shaft from the factory. Maxon specs a force of 80N for press fits.
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