We recently upgraded our DIY machine from 170 oz/in motors to 425 oz/in motors. With the lower torque motors we could not get the ipm speed nessecary to cut wood (80 - 110 ipm). Thinking that our motors were the problem, we upgraded them to the larger ones mentioned above. Actual motor details here.
With new motors in place, we still have speed issues. They are actually slightly worse with the new motors than the old. I'm wondering now if our controller is the issue. We are using the TB6560AHQ drivers implemented in this board.
The motors are 200 steps / turn at 1/2 micro stepping = 400 steps/turn
The lead screw is 12 turns / in.
So total turns per inch = 4800.
We began trouble shooting by completely removing the motors from the machine and just driving them with no load. I could get the motors up to 110 ipm with very slow acceleration. At that speed, I could just tap the dampener (a rubber hockey puck) with one finger and get the motor to stall. I would have expected these motors to be much more robust than that. When hooked to our y-axis, the best i can do with no stalls is 40 ipm and fairly slow acceleration.
Could this be a driver problem? Perhaps lack of sufficient current? We would greatly appreciate any help as this is devastating our progress.