Re: [CAD_CAM_EDM_DRO] Re: 9x42 conversion

I don't know very much about steppers - I used Servo's to convert my
Comet 10x50..

<http://www.smidgie.com/928/machineshop>

I used Reliance Electric E712 servos with Gecko G320's. The motors are
rated for 300oz/in continuous, 1,500oz/in peak (limited to about 750oz/in
peak with the G320's). I'm using a 2:1 reduction, 5tpi ballscrew.

Using Mach2 on a 600mhz PIII, I'm running it with 105ipm rapids.. With a
faster PC, my rapids could be a bit better.

I think that once you get into a Bridgeport size machine, steppers are
not that much cheaper than servos. At least that was my personal experience.

--C.S.

>
>
>Thank you Ron. Servo's is a strong consideration. Do you
>know of a good source for the motors, or should I just look
>around.
>I have thought about driving the knee also, but I figured
>the accuracy of the whole knee dovetail and the gears would not be
>very accurate. I guess it is accurate enough for the Z axis
>especially in light of the fact that the axis does not see a large
>range of motion in most machining operations.
>Can I ask you what kind of items you mostly machine?
>
>Thanks,
>Scott