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General Mach Discussion / Origin position -x keeps creeping when returning back to Zero----HELP !!!
« on: February 01, 2008, 12:15:12 AM »
:(I did several tests and the machine will not return to it's origin....I have cadded out a 5x5 square and turned it on a 45 degree angle flat on the table, I mark Z position by touching down on my surface. Then the bit starts it's cutting on the middle line which is what im looking for is alignment when the bit completes it's cutting, but what im getting is the alignment is not lineing back up to it's starting cut, and it's off in the -x position by about 1/16th and when it returns to it's zero position it's also off by 1/16 in the -x.
Each time i run the program it creeps another 1/16th in the -X.....and the DRO reads x-0 y-0....My y position is perfect. When i run a circle it seems all proper except when it returns back to origin....
We know it's not mechanical....we have checked all our setting that we know, we ran the program on our other CNC's and it works 100% on them...So is it MACH3...something weve missed....
As A NOTE: if we touch down and set x0 y0 and make a program to move 12" in the positive x and return back to it's origin it's out by maybe 1/64 without any real cutting at all, and if we keep running this program it just keeps adding up the negative error an moving a 64th back more each time.
thanks Jeff
Each time i run the program it creeps another 1/16th in the -X.....and the DRO reads x-0 y-0....My y position is perfect. When i run a circle it seems all proper except when it returns back to origin....
We know it's not mechanical....we have checked all our setting that we know, we ran the program on our other CNC's and it works 100% on them...So is it MACH3...something weve missed....
As A NOTE: if we touch down and set x0 y0 and make a program to move 12" in the positive x and return back to it's origin it's out by maybe 1/64 without any real cutting at all, and if we keep running this program it just keeps adding up the negative error an moving a 64th back more each time.
thanks Jeff