Mechanics and Construction > Mechanics and Construction

Just got new MINI steppers. What is the smallest way to do PWM?

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Sisco:
Mini? Damn.. Those things are Micro Steppers :P

ROBOT420:
waltr; Did they get there yet?

Sisco; Want some?

waltr:
Not yet. Maybe tomorrow.

jwatte:
Where'd you get them? They are adorable!

ROBOT420:
Just got this info from a fellow who ordered some from me off ebay.....

Hi Stephen,
I received the stepper yesterday and I have done done some preliminary
testing on then. I have a manual step controller. It's nothing but a
bunch or switches that switch in polarities to simulate stepping. I
started using 5 v and then pushed it up to 7 v. With continuous
current on the coils the stepper started to heat up noticably. I found
at this  voltage the current was 153 ma @ 7v. The steppers have an 8
step per revolution. I think this can be refined using half steps and
a dedicated controller chip. I'll be looking into that. Soldering a
lead to the post is something that you have to be quick and use a very
small iron. The plastic case for the post will melt in a heart beat! I
do not have anything definite on the torgue yet as the controller chip
when I find it and get it hooked up will answer this more directly. So
far the steppers seem well made and work consistently with the
primitive setup that I used to make the steps.
Again the controller chip is what I need to look into next. I will
keep you informed. I would be interested in ordering more in the near
future after I get a controller chip connected.

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