Re: dinky microstepping driver ? Linistepper

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@y...>
wrote:

> Dave,
>
> Romans honesty in specs might be misread from your post...
>
> Very few microstepping drives are actually accurate at each step.
> Roman is just saying this. His drive is no less precise in its

steps

> than most any other microstepping drive... In fact, it can be tuned
> to be more precise to a specific motor if you can "do" pic
> programming.
>
> And the 3600 IS based on a std. 1.8 degree motor and its 200 full
> steps/rev. So yes, up to 3600 microsteps per rev.

I understood this part, that doing the math would yield the motor
natural steps, but I expect someone with one of those odd 7.5 degree
per step motors might expect 3600 steps per revolution. and
inversly. a 400 step motor will offer 7,200 steps per rev.

>
> BTW, The Xylotex bd is also 35 volts, and so is the 5804 unipolar
> chip. Until the recent Gecko debut, 24 and 35 volt stepper drives
> were really common. Still are... I've run 297/298 drives at 34

volts

> for years... Plenty of torque, since torque is amps, not volts. And
> Jeff can speak to the speed available at 24 volts with his Xylotex
> bds...

There is no doubt that a balanced and engineered sysem will work
better than one with just plain voltage. I currently use 35 volts
for my 1.7V steppers, in series to keep them cool, and still have
pleanty of power and speed left over.

> And while we're talking volts, be sure to read what Roman has to

say

> about the subject in his description/ tutorial. When I first saw
> these about 6 or so months ago (and ordered a few), I was thankful
> that someone was saying something besides "Ya gotta run at 10-25
> times the motor rating..." Different drives perform differently,

and

> to try to use the specs/recommendations for one to evaluate another
> can be a bad choice. The proof is in whether the needs of the
> application get met.
>
> 25 bucks and some solder time instead of hundreds? Not a bad trade,
> IMO. And these drives, as I posted already, are pretty nice. And
> cheap. Just hot.

The only thing I missed having is a order form with all digi-key part
numbers.... but then, sometimes one acutally has to do SOME work !

You are correct that Romans details are plain and straightforward, no
beating around the bush.

Dave