Re: [CAD_CAM_EDM_DRO] Motor/Leadscrew Couplers

You can mount the motor with a hard coupling and let it simply hang there,
with the motor weight carried by the lead screw bearing. A simple drag link
takes care of the torque. This layout is not particularly sensitive to
slight misalignment, esp if the link is not over-rigid.

At 03:13 PM 11/22/02 -0800, you wrote:

>
>I'm kind of a newbie at this and I'm trying to interface the Frog to my
>lathe. The end of the leadscrew on my lathe has an external M8 x 1.25
>thread, about 8mm long. The stepper motor is a nema 23 with a 0.250"
>diameter shaft. I was wondering if the group members had suggestions on a
>good coupler design. I machined a "hard" coupler out of aluminum threaded
>one side to screw on the leadscrew and reamed on the other side for the
>shaft. Each side has a couple of set screws to hold it in place. I was told
>that you don't want to use a hard coupler and I kind of believe it -- any
>slight misalignment of the motor causes the friction to go through the roof.
>
>Any suggestion would be greatly appreciated!
>
>Thanks,
>Kory
>
>
>
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