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General Mach Discussion / Backlash Settings
« on: July 24, 2009, 06:59:54 AM »
I'm new and I'm trying to fine tune my small wood working CNC router. I found that I had a first pass issue that caused the first pass to cut into the part by as much as .025 and then the remaining cuts would be spot on. I added Backlash to Y of .024 and this cleared the first pass issue.
I adjusted my machine so that the Y axis moves much more smoothly now. I had the V-Wheels too tight. I was able to reduce the backlash setting to .0095. I found that adding the same .0095 value to the X axis cleared up a very slight first pass issue on the X axis as well.
Is a Backlash setting of .0095 for X and Y a reasonable number for a CNC router designed for wood or should I continue to try to smooth out my machine movement? Everything looks right now including circles but it is hard to tell via the old eye ball method.
My Backlash speed is set to 100%. This seems to work but I wonder if this setting should be lower. I did have an issue once during test cuts and jogging where the machine would trip. I turned Backlash off and the problem went away. I turned Backlash back on and the tripping came back, finally I changed the setting to .1 and the problem did not come back and then I changed back to .0095 and I have not experienced any more tripping issues. My machine is set to run at 60 IPM Max at the moment.
Thanks,
BillJ
I adjusted my machine so that the Y axis moves much more smoothly now. I had the V-Wheels too tight. I was able to reduce the backlash setting to .0095. I found that adding the same .0095 value to the X axis cleared up a very slight first pass issue on the X axis as well.
Is a Backlash setting of .0095 for X and Y a reasonable number for a CNC router designed for wood or should I continue to try to smooth out my machine movement? Everything looks right now including circles but it is hard to tell via the old eye ball method.
My Backlash speed is set to 100%. This seems to work but I wonder if this setting should be lower. I did have an issue once during test cuts and jogging where the machine would trip. I turned Backlash off and the problem went away. I turned Backlash back on and the tripping came back, finally I changed the setting to .1 and the problem did not come back and then I changed back to .0095 and I have not experienced any more tripping issues. My machine is set to run at 60 IPM Max at the moment.
Thanks,
BillJ