Hey all,
In the process of fine tuning and working out some issues with my Taig mill. Running a PC with a 3.16Ghz processor with 4Gig RAM, connected to a Leafboy77 (
http://leafboy77.com/index.php/en/) USB motion board, connected to 3 each 2m542 stepper motor controllers, then connected to the 3 570oz/in stepper motors. Also installed is a 48VDC power supply.
I am curious as to the speed at which other owners have their Taig mills running. With backlash enabled, I am pretty much limited to 12in/min. Without backlash enabled I can jog at 25. I really would like to be able to machine close to that speed with backlash enabled. I only have backlash compensation enabled for Y at .003". Is backlash compensation a inhibiting factor?
Questions are, I have tried to follow the 50/50/50 rule talked about before with regard to backlash compensation. Took the middle of the two extremes of .050 and .005 for a setting of .0275 for the shuttle speed. Backlash speed set at 50%, and motor speed set at 15ipm. Again, the mill without backlash compensation enabled and speed set higher can traverse at about 23-25ipm. Again, I would like to be able to approach that with the backlash enabled. Assumed that with these motors, they would have the torque to do nearly anything I needed.
Also dealing with another abnormality. 20% of the time when jogging X and Y, X will sometimes slow and chatter, as if losing steps. I can let go of the Y arrow key and X will still chatter. I can also toggle off and on the Y arrow keys and stop and start Y at will all the while X is still chattering. Sometimes the roles are reversed, so it doesn't only affect X. I can run X and Y separately and never have a problem. Why does it happen when they are operated together sometimes? It can be a real pain especially when the part is zeroed and I am just moving the spindle out of the way or changing tools or moving to begin a tool touch. If I hear the steps being lost, I have to backtrack, waste time and reinstall the edge finder and rezero.
Would running CV help the issue? Also what effect does the kernel speed have on mill operation?
Ultimately, I would like to get rid of the stepping issue, and increase my machining speed.
Let me know what you all think.
Pete