Category: Milling Machines
Hey, I have a weird issue. Not sure where it comes from or what the cause is, but I don’t know what to look for anymore.My machine is off position at the end of the program. For troubleshooting: I put a work piece in my machine and went to X10 Y20 and made manually a mark on the workpiece.Then I run a program and at the end I go back to X10 and Y20, but the machine is off in X and Y for a few millimeter. This is happening again and again and it is always the same distance off. First I thought it had something to do with speed and acceleration. I tried lowering it. Same error. I let the machine then run in a higher Z position without any load. In the air so to say. Same error!Then I tried another NC program, same thing here. At the end it’s repeatable a little bit off.I lowered the acceleration (75mm/s2) and feed speed to 1/10 (600mm/min) of its original value. Same error!I had deadband at 0.01 and lowered it to 0.007. Same error.I tried changing the Ferror from 2.0 to 1.0. Same error.I tried different programs and it feels like the offset is larger if the travel within the program is larger.I checked the mechanics and I am sure it’s not a mechanical error.I don’t know what else to test.
The machine is an open loop stepper system with DM322T Driver and Nema 23 motors.
