Re: [CAD_CAM_EDM_DRO] what gear ratio ???

ja_erickson wrote:

>
> anybody out there ever used a 400 oz. in. servo motor with a .200
> pitch lead screw ? i'm trying to find out what gear ratio i'll need
> for a boss 5 bridgeport retrofit. any help would be greatly
> appreciated.
>
> thanks in avance
> jeff

My cnc SuperMax mill uses direct drive (well, belt driven 1:1 ratio)
1100 oz*in steppers on 5 TPI ballscrews. Using Gecko G201's
and my 75VDC 1KW power supply it works great (0-2 ips in 1/4 second
on the X&Y, twice as fast on the quill).

My guess on the 400 oz*in servo is that value is its 5% duty
peak value, and might only have a 40 oz*in continuous value,
not so good for direct drive milling. I'd say try a 2.5 : 1
or 3:1 gear ratio for a start.

Doug Fortune
http://www.cncKITS.com
















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