Re: [CAD_CAM_EDM_DRO] Tuning Geckos

In a message dated 29-Jul-02 05:57:27 Central Daylight Time,
jake@... writes:

> Does anyone know what frequency range I should be looking
> for when tuning?

Jake: Will be VERY interesting to see what OTHERS have to say about this.
It surely will depend on the L of your motors. I have some new KML Size-23
S.E. motors, ca. 3.5 V - 3.2 A windings ("four wire"), and they "skip steps"
if pulsed over 400 steps/second (without ramping). Not sure why. May never
know, as application does not require high speed (plotter), and I am very,
very lazy.

I would guess you should be able to "start from dead-still" with 200
step/second, or maybe more, on up to perhaps 400. But that's assuming the
"mechanics" would be about the same as the lathes I have built with steppers.
The new KML series seem to be the cat's meow, at least in Size-34! Those
are flawless (with S.E. drive, that is!)

Lotsa luck! Jan Rowland


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