Re: [CAD_CAM_EDM_DRO] Adding a Tail shaft to servo's with no tail shaft

jerryflyguy wrote:

> I remember someone posting a process they went through to add a tail
> shaft to a DC motor, thus making it possible to put an encoder on it. I
> can't find the site in my huge pile of favorites, anyone ever done this
> or remember the site I'm thinking of?? I've got my hands on some great
> DC motor's but they don't have the tail shaft..

I've done it a few times. I take the armature out of the motor, chuck
it up in the lathe and support the end you need to fit the shaft with a
fixed steady.

Drill, ream, bond a shaft in with a high strength loctite. If you need
to you can make the new shaft slightly oversize, and true to size in the
same setup as soon as the loctite has gone off.

If you are trying to use a standard DC motor, try to use one with a
skewed rotor, they work better as servo motors.

Wayne....

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Wayne M Weedon Email: wayne@...
Fdos Design Poole UK
Tel +44-1202-677025 Fax +44-1202-770515 Mobile: 07774 439915

Specialists in small batch & Production Mechanical/Electrical Engineering
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