I'm having trouble with my DIY CNC engraver. I've tried to include as much info as possible.
Here's a picture to demonstrate the problem: http://stratcat50.googlepages.com/YAXIS-BAD.jpg The actual program is a 12 in ruler, this pict is just an example. It seems like the Y axis is dropping steps occasionally when moving towards Y0. I typically run 8-16 IPM cutting and 12-20 IPM rapids. I went through the machine today and did a complete clean & lube. Tightened the cogbelt between Y motor and ballnut. Made it the same as the X axis cogbelt which uses identical motor, ballnut, cogbelt, etc. Checked for binding, obstructions, etc. All OK. I can do F8 G01 X18 Y5 G01 X0 Y0 and both axes return to 0. It only happens after many Y axis operations. The shift does NOT always occur at the same place along the X axis and is NOT a linear shift (ie; X=2 Y=0.01, X=4 Y=0.02, X=6 Y=0.03 etc) The shift is NOT always the same amount. And... sometimes at the start of a program, the Y axis just growls and doesn't move. A little push and it's on it's way. All this using 5V 1A motors running off a PC power supply's +5 supply. This afternoon, I connected the Y motor to the +12 supply through an 8 Ohm/200Watt resistor. It actually sounds better, but still has the shifting problem. It just started this recently. I didn't notice it when running Win/KCam. Installed EMC from the live install CD on an IBM Net Vista, 256MB, 667MHz Celeron. kernel 2.6.15 magma, EMC/Axis 2.1.0 The latency test shows around 16000 after running 20 minutes. I know Linux pretty well though have always run text mode in the past. The GUI is new and foreign to me. (And this from a Mac user ;^) EMC appears to be running fine. Thanks for any suggestions, -- Emory Smith [EMAIL PROTECTED] http://defoliants.googlepages.com ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
