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

Thanks Mark, how tough is it to pull the armature out of the motor to machine the shaft? I've got a machinist who I think would gladly tackle it but I don't want to wreck the motor by pulling it appart or something. Also, what is the reasoning behind the flex coupling to the encoder? I could see it if the tail wasn't running true but.. if it is..??

My game plan was to simply face off the end of the existing shaft.. d&T for a male stud type stub shaft and lock-tite it in there.. and be done.. I like the idea of chucking the drive end and using the body on the steady so you can true the end if need be.. like you say.. it might be hard on bearings depending how its set up..

any "got ya's" to watch for while pulling these appart? They are an MCG motor...

Jarrett

----- Original Message -----
From: Mark Vaughan <mark@...>
Date: Thursday, April 26, 2007 3:47 pm
Subject: RE: [CAD_CAM_EDM_DRO] Adding a Tail shaft to servo's with no tail shaft

> I have popped the motors in a lathe before, drilled and taped the
> end, then
> bolted a stub on with some locktight.
>
> You can normally get it pretty true if your careful with your
> turning, you
> can run the motor and hand work the stub afterwards with a graver
> if there's
> any slight error, or spin the motor on a lathe with the body held
> in the
> steady so it runs tru in the motor bearings to finish it off. Make
> sure you
> use a flex coupling to the encoder, even on motors with tail shaft
> stubsfrom new.
>
> I have seen others join the stub in with a V, or filled slot to
> stop it
> turning, but locktight and hi tensile socket cap head seems to
> work, glues
> it all to the screw.
>
> Make sure you motor doesn't have a thrust bearing on the end, if
> it's a
> roller bearing your OK, but some motors have a single ball thrust
> bearingwhich might cause an issue.
>
>
>
> Regs Mark
>
>
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>
> Managing Director
>
> Vaughan Industries Ltd, reg in UK no 2561068
>
> Water Care Technology Ltd, reg in UK no 4129351
>
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
>
> RSGB DRM111(Cornwall)
>
> _____
>
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of jerryflyguy
> Sent: 26 April 2007 22:08
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Adding a Tail shaft to servo's with no
> tail shaft
>
>
>
> 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..
>
> Thanks guy's
>
> Jarrett
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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