Re: [CAD_CAM_EDM_DRO] Re: Servo motor question

harry32002001 wrote:

>Les,
>Thanks for responding as I posted this question on another board but
>didn't get into the sizing to this level. Here's the specs that I
>have
>KT37.5 Oz-in/A, Max peak current44.5,
>

Peak torque is 1669 Oz-In

> Max Con. Stall torque300 Oz-in,
>Max con. Current 8.9A I have more info if you need it. I feel a 2-1
>ratio would be better than the 1-1 I now have but I really don't
>want to go into the Z and X-axis if possible the Y would be simple.
>

I wouldn't worry too much about it. There's no need on the Z, as the
standard Bridgeport J head has an overload clutch on the power feed
that is set at 200 Lbs linear force. Even limited to 20 A by the G340, you
get 750 Oz-In. Figure out that is about 15-20 Lbs of force on the standard
manual handles, and with ballscrews, more of that gets to the table.
The continuous rating comes out to about 6.9 Lbs force on the handles.
That could be just a tad marginal, depending on the work that you expect
to do.

Jon