I'm hoping someone here may be able to help. I just got my cnc setup, installed mach3 on a windows 7 machine and setup the configs as instructed by the cnc seller. What is really weird is when I test the motors (jog) without any other applications running the steppers barely move; however if I start up another program that uses a fair amount of CPU power (such as Adobe media player, or Google chrome) , the motors run at normal speed. The second I terminate the other program the motors go back to barely moving. Any help at all would be appreciated.
I've heard of this once or twice before, several years ago. There's a post here somewhere where someone found a small program to run in the background that fixed the problem. Not sure what the actual cause is. Possibly a specific motherboard-CPU combination that causes it?
I don't recall the exact program used, but it was something like this.
http://www.cpukiller.com/The author of the post I mentioned claimed that his processor was running to fast for Mach3, and slowing it down allowed Mach3 to run perfectly. I believe the problem was something else, as it didn't seem to affect anyone else. But if it works for you, it's worth a shot.
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