Re: Low cost 6A stepper drivers on eBay

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "arielnh56" <3in1@r...>
wrote:

>
>
> I had assumed that the microsteps/half steps were for increased
> resolution. I stand corrected.
>
> The gecko microsteppers are about 5 times the price of these basic
> drivers. While I accept that "you get what you pay for" surely

these

> are not complete junk? I thought the resonance issues only

happened

> at certain speeds (or load/speed combinations?). If this is the
> case, would it be a practical approach to go with these and work
> around the resonance issues by adjusting feed/speed until I can
> afford the upgrade to the microsteppers?
>
> Al

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Maybe not. A few years ago I was setting up a minimill, with drivers
that change between full, half, 5, or 10 microsteps (Flashcut 3.5
amp). I changed the drivers from 5 microstep setting which had
worked flawlessly, to half step, and immediately lost steps on parts
due to resonance.

If any of your parts will have arcs, the machine will go through
the "bad" spots of resonance no matter what feedrate it's run at,
with possible lost position.