Re: [CAD_CAM_EDM_DRO] Shoptask cnc steppers

At 10:23 PM 1/16/03 -0600, you wrote:

>I've got a question for the group. I've go a shoptask 3 in1
>I'm trying to set the maximum step rate on the motors. The question
>is how much force should the X/Y table apply before losing steps
>I realize that it will vary depending on what material is going to being cut
>I'm just looking for an approximate figure I'd like to get the most speed I
>can and still be reliable. Any ideas

My conversion will shift bolted-down parts and tooling before it stalls, or
occasionally if crashed in the right direction it unscrews the pulley
retainer nuts. That may be overkill but it doesn't ever lose steps while
working. For ref, I'm running 450 oz/in steppers at 3-3.5 amps, a 2.5:1
drive ratio and 5 mm pitch screws. I use Berg's cable belts and it will
even break them at splice bushing, or did before Berg corrected a QC
problem. Anyway I overkilled that too, had them make me some customs with
two bushings per splice.

Regards, Hoyt McKagen


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