Topics

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General Mach Discussion / An answer to my motor stalling problem when reversing

« on: July 17, 2011, 11:14:15 PM »

 I found that it was my backlash enabled causing my stalling problem when ERP listed several things as did others. When I disabled backlash, it started working fine. I found that I needed the backlash to make my machine accurate but couldnt make the stalling when reversed quit. Then I found an article that answered my problem. I dont know the guys name, but he had the same problem and recommended setting the shuttle speed from 1 to .500.  I did and it worked. I ended setting it at .250 and it works great. I had no idea that this had anything to do with backlash settings.  I hope this helps  someone else with backlash problems. This setting is found under general configuration. Again, thanks to all who replied. What a great forum Thanks,  Vincent
 

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General Mach Discussion / when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 05, 2011, 10:17:06 PM »

Hi guys, I'm a newbee. Bought a taig cnc from Deepgroove a few years back with xylotex 4 axis board and never could get the motors stepping right and finally gave up and didn't touch it till now. I'm going to try again hopefully with help from the forum so I can use this thing. I have 280 oz, 1.8 deg. 2.7amp motors with a 24 volt 8 amp power supply. I have tried every kernel on Mach 3 but was never able to get them to run right. I have checked the voltage settings on all the axis's and they are set at 3.3 volts no motor attached. The power supply has 24 volts and doesn't drop when the motors turn. The motors will get up to speed and be very smooth if you keep going the same direction but if you  reverse directions, the motors stall and slowly get up to speed. If you keep going the same direction its great but if reversed, same thing again. I'm lost. It seems like some kind of pulse thing but I just don"t know. The z axis  doesnt do this. Only the y and z. Any help is appreciated.  Thanks, Steelman