Re: [CAD_CAM_EDM_DRO] Steppers

In a message dated 31-Mar-02 03:01:54 Central Standard Time,
capper@... writes:

> Is there a mechanical way to trigger steppers? I was thinking about
> putting one on the down feed on my shaper and triggering it with a
> switch or something on the backstroke. Probably a stupid idea.

No, Cap! NOT a "stupid idea" at all, if you will "never" need to do more
than that! Such as make it "step", say, five clicks, or ten, per stroke, for
some jobs, etc. You could rig DPDT (latching?) relays for bipolar motors
(better choice!), or SPDT's for unipolar "six-wire" motors, but this would
really be a primitive kludge! But, could work!

Of course, you could also have fine, bipolar chopper-drives such as Gecko
G210 or 201, with 24-80 VDC supplies, and de-bounced micro-switch
input-circuits, and all that, and do "same thing", only perhaps "more
electronically elegant". The advantage of this approach would be that you
could make the shaper do dances for every stroke! And, in this case, you
could use opto-isolator "switches" rather than microswitches.

Lotsa luck! Work carefully and neatly! Jan Rowland


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