5 replies to this topic

[havlicek]

Bob's try at winding an arm sequentially got me thinking.

 

In a can type motor, the brushes are aligned with the two permanent magnets. In an open frame type motor, the brushes are most often at 90 degrees to the field plates. Have I wound any sequential five-poles arms for anyone for open frame type motors?

 

For the life of me, I can't remember whether I have or haven't... and if so, if I timed the comm the same way as I would for a can type five-pole. I know there were some five-pole arms available back in the day that could be installed in FT36D can motors, but don't know if those were stock or timed specifically for the conversion.. .or even if the brush arrangement made a difference.

 

-john

[SlotStox#53]

All the 5 poles you've done for me John have been for padlock/laminated field motors

Although the one I'm gonna send to you is from an open cage motor

So wound the standard 5 pole way the comm solder tabs are in the middle of the poles and comm slots in between poles.

But the arm is destined for a padlock motor so brushes will be like the dc85 Pittman and kemtron motors . The way you've neutrally timed them is perfect and run really sweetly .

[havlicek]

Whew...thanks Paul.  So many motors of so many types and I can't really remember all of them.  I really should write this stuff down!

 

-john

[Gator Bob]

Good news Paul,

Now ... If I didn't create any shorts or didn't loose count wrapping turns it might run ....

 

Understanding that there is that 90deg. com/mag placement thing is why I didn't rotate the com to the 'normal' tab/slot location.

Plus .. I didn't want to change it because on the padlocks I don't completely understand the long magnetic field 'face' time the arm core mass sees.

 

The way I connected to the com it's like the wire leaves the tab and winds around the 'next' lam pole.  

I think it will have advance and be timed CW at the drive end.

 

[Gator Bob]

I lost the thread where we were talking about putting 36D brushes on a padlock.

 

Well I found something in a stash of 'prototype materials' from different time and that instantly lead to a rock solid idea on how to make it happen.

 

It hit me like I stayed at a Holiday Inn Express last night.

 

I'll move some stuff over to the "MyBuilt" thread to try and keep track of things.

[SlotStox#53]

We had mentioned the crazy twisted idea in the Rods & Rails thread So it's a good thing you found your stash of prototype goodies !

*edit*

Here's the X503 arm John wound Bob..

Showing the tab in between the poles and comm segment gap in the middle of the pole.

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