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Old May 21, 2007, 05:43 PM
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ryanl2006's Avatar
Ames, Iowa
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Tired of shorts? New stator coating from CustomCDR.

I know many people get frusterated winding motors when they encounter shorts (me included!), so we decided to look into options to completely elimate shorts from our vocabulary. After quite a bit of research and experimentation we finally have a bullet proof solution.

We (CustomCDR) are now set up to apply a special powder coating to any size shape or type of stator. The coating itself is not particularly new, I am sure many of you have seen this green coating before when you open up the occasional cd-rom or other motor, but as far as I know we are the first in this industry that can (or are willing to) apply it in very small quantities. We have been playing around A LOT with application techniques and finally have it dialed in.

There are several advantages to both this coating and our application technique. First and foremost is no shorts whatsoever, no matter how hard you pull on the wire. Another plus is that we can very finely control how thick the coating is layed on. For our 16.5mm motors the coating is 0.25-0.5mm thick and is still completely short free. The inner hole and outer teeth get masked prior to coating to prevent any coating there.

We are obviously using this coating on our 16.5mm motors, but have also coated gobrushless 20mm stators, and can do prestacked doubles, triples, etc. No more dealing with those little endcaps.

Lastly, we can do essentially any stator out there, so if you find a perfect stator but have no way to insulate it, just let us know.

At this point this coating is integrated into our production 16.5mm motors, but right now we are testing the waters to see if anyone would be interested in just plain stators that have been prestacked or precoated such as the GB 20mm stators.

Let us know what you think, or feel free to add in any other suggestions.

Thanks,
-Ryan
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Old May 22, 2007, 07:18 AM
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BlazerB52's Avatar
Fenton,MO USA
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I would be interested in them,I have been tring to wind a 20mm triple and have about given up on it.Tried to add enamel on the stator and can't seem to get it on evenly.I would welcome it.
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Old May 22, 2007, 07:38 AM
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659 Posts
well, sign me up for a triple 20mm (with the extra lams)
because the stack keeps falling apart on the wooden dowel and
I keep scratching the 22g wire when this happens.

Peter
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Old May 22, 2007, 08:03 AM
Maryland
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ryan - if you wanted precoated 20mm doubles you should have just asked.
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Old May 22, 2007, 08:25 AM
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morphs's Avatar
UT
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Quote:
Originally Posted by ScubaSteve
ryan - if you wanted precoated 20mm doubles you should have just asked.

I thought we did..
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Old May 22, 2007, 08:53 AM
Scratch builder
USA, PA, Telford
Joined Apr 2004
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Just out of curiosity, is it the electrostatic process or the hot part blow on type? We have both here at work and find that the electrostatic is easier to control. A bit messy, but otherwise OK. Like they used to say to the cannoneers, keep yuor powder dry
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Old May 22, 2007, 10:57 AM
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UT
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It is applied by dipping the heated parts into a fluid bed filled with the powder.
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Old May 22, 2007, 11:08 AM
Scratch builder
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It sure is nice to have the right equipment.
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Old May 22, 2007, 12:50 PM
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ryanl2006's Avatar
Ames, Iowa
Joined Oct 2002
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Quote:
Originally Posted by KenSt
Just out of curiosity, is it the electrostatic process or the hot part blow on type? We have both here at work and find that the electrostatic is easier to control. A bit messy, but otherwise OK. Like they used to say to the cannoneers, keep yuor powder dry

An interesting thing about this powder is that it can not be applied by electrostatic sprayed (at least thats what the manufacture says, we never tried it). It has be dipped in a fluid bed or preheated and sprayed.
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Old May 22, 2007, 12:52 PM
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Ames, Iowa
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Quote:
Originally Posted by ScubaSteve
ryan - if you wanted precoated 20mm doubles you should have just asked.

We did If I am remembering your words correctly, you said it would require a 'mold change' which was quite expensive and took a considerable amount of time. Now that we can do it ourselfs, it is fairly cheap, just involves labor(we have a basically unlimited supply of powder now...)


-Ryan
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Old May 22, 2007, 01:10 PM
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How much for a triple stator ? and how fast can I get one

Peter
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Old May 22, 2007, 01:34 PM
Maryland
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ah well my memory is like someone's twice my age. the factory sent me one a few months ago - double 20mm w/ the familiar green slime coating.

either way, sounds like your powdercoating should be fun, although messy and time consuming.
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Old May 22, 2007, 01:48 PM
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ryanl2006's Avatar
Ames, Iowa
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Quote:
Originally Posted by peterp1964
How much for a triple stator ? and how fast can I get one

Peter

I am working on a price now, they will obviously be more then 3 stators + 2 laminations, but I want to keep them reasonable, less then $10 for a triple.

I am building some triple ones now. The only problem is that the glue that is used for stacking takes 24hours to dry (it has to be able to withstand 400 degrees so it is some pretty intense epoxy). I should be able to post pictures tomorrow.

Thanks,
-Ryan
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Old May 22, 2007, 01:51 PM
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Ames, Iowa
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Quote:
Originally Posted by ScubaSteve
ah well my memory is like someone's twice my age. the factory sent me one a few months ago - double 20mm w/ the familiar green slime coating.

either way, sounds like your powdercoating should be fun, although messy and time consuming.

Time consuming? Well yes it takes a while to figure out how to do it.

Messy? No not really. If you use a fluid bed it is all contained within a 'box.'
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Old May 22, 2007, 04:25 PM
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Oklahoma City
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Ryan, I could use a 3 stack(~6mm) and a 5stack(~10mm) of 12T 25mm GB stators. I always seem to short through the enamel coating. I think I have some of the older uncoated stators too.

Morris
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