LinkBack URL
About LinkBacks
What is your power supply voltage and what are your motor specs (ie voltage, current, photos etc)?
| | |
Ok guys. sorry no pictures yet but I promise they are on their way. I just finished my electronics and decided to do some testing with my steppers. At first it seemed they worked great, however, I soon realized that wasn't the case. About 20% of the time they stop spinning and stall out. They still sound like they are running but they don't spin. It seems like (but I am not sure on this) it occurs more when they get hot. Could this be that case? Any ideas? I have the hobbycnc EZ board and three nema 23's.
Thanks all, Beau
What is your power supply voltage and what are your motor specs (ie voltage, current, photos etc)?
My motors are size 23 steppers. They they run at 3.6 volts and draw 2.3 amps. Here is a link to them.
1.8DEG. 3.6V SIZE 23 STEPMOTOR-MPJA, Inc.
My power supply is a 24 volts 14.5 amps and is regulated.
Here are a few pics of my controller box(almost finished.)
Sorry for the bad quality. It was just my phone. I will try to use my camera for the next pics.
Happy cncing, Beau
I just found a video on youtube in which the guy has the same problem.
[nomedia="http://www.youtube.com/watch?v=vg1p99FGUXA"]YouTube - CNC stepper motors stalling[/nomedia]
Best regards, Beau
Play with the motor tuning, you may have the steps per wrong or the speed is set too high. I remember having this problem when I was setting my first machine up. I have the hobby cnc 4axis board.
http://www.beamsshop.com
Its weird thought because it will even do it at slow speeds like 20 ipm. I can't seem to figure out what causes this.
Resonance. It actually can be worse when the motors are not attached to the machine.
See this thread.
http://www.cnczone.com/forums/steppe...tml#post256639
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
I have used a similar PSU voltage to your 24v and have similar unipolar IC drivers, and similar unipolar steppers (mine are 3v 2A) and mine gets excellent low-med and high speed performance although I never have a need to run it over 12 revs per second.
Check you have the right current adjustment, you can even run a little over the rated current with unipolar like using 2.5A instead of 2.3A.
After that it might be an issue with the wrong acceleration ramps or sometimes a PC issue where an interrupt or something is causing pauses in your step signal.
And like Ger21 said you can't judge it when the motors are not attached. I have a foam pad that I sit the motors on when testing them with no load, and sit them sideways which helps a little with the resonance.
Posting Permissions
| | |
