6541
General Mach Discussion / Re: Motors stalling, losing steps
« on: February 08, 2009, 10:03:33 AM »
The capacitor formula in reply#16 is a standard powere supply formula you will find in most electronic books.
The capcitor size found from the formula is a value, which if used, should provide you with DC ripple
to less than 10%. So less cap maybe more ripple in the DC and likewise more cap less ripple. So it acts
as a fiiter.
As far as steppers running hot....I don't like mine running above 120F ( my preference only )
80C and above you can burn yourself and they should be guarded from a safety point of view.
Yes you can run them hotter. Motor winding insulation is one limit on how hot you can get them.
I know that if the temp gets to high they will start acting strangely.
Then if they are only warm, the motor isn't working to it's available potential.
The "ticking sound" ........you realy need to take a look at the generated pulse signal out of the
PP port and see what it looks like. If you have ringing or whatever on the signal out of the PP it can
create all kinds of problems. The only way to clean up a pulse signal is deal wiith the source of it.
If you can't find that source and cure it.......nothing downstream will clean it up......from trying homemade
clean up circuits / break out boards / different PP card , if it's generated by the computer before the PP,
they will probably not work ( my experience and what other knowledgable people have told me).
One solution is to have the pulse provided by using the SmoothStepper.
Just some info for your consideration as i think your not having much fun!,
RICH
The capcitor size found from the formula is a value, which if used, should provide you with DC ripple
to less than 10%. So less cap maybe more ripple in the DC and likewise more cap less ripple. So it acts
as a fiiter.
As far as steppers running hot....I don't like mine running above 120F ( my preference only )
80C and above you can burn yourself and they should be guarded from a safety point of view.
Yes you can run them hotter. Motor winding insulation is one limit on how hot you can get them.
I know that if the temp gets to high they will start acting strangely.
Then if they are only warm, the motor isn't working to it's available potential.
The "ticking sound" ........you realy need to take a look at the generated pulse signal out of the
PP port and see what it looks like. If you have ringing or whatever on the signal out of the PP it can
create all kinds of problems. The only way to clean up a pulse signal is deal wiith the source of it.
If you can't find that source and cure it.......nothing downstream will clean it up......from trying homemade
clean up circuits / break out boards / different PP card , if it's generated by the computer before the PP,
they will probably not work ( my experience and what other knowledgable people have told me).
One solution is to have the pulse provided by using the SmoothStepper.
Just some info for your consideration as i think your not having much fun!,
RICH