I have three external drivers on my large CNC mill (one for X, two for Y axis and Z runs on an internal driver) and am getting some missing steps. I just upgraded this machine to two-start lead screws with anti-backlash nuts and did not have missing steps when X and Y were running slowly off the internal drivers. I purchased 2M542/STM5045 external drivers and running two 36 volt, 9.7 amp power supplies (one for the Y steppers and the other for for the X stepper).
While reading recent forum posts I saw the following and wonder if I need to increase my microseconds_per_step_pulse setting to 2.
"I also increased microseconds_per_step_pulse = 2 in the config file because the M542T datasheet recommends a 1.5 micro-second pulse as a minimum"
Anyone mess with this setting? Are there other related settings that would need adjustment as well? I'm running the drivers at 3200 steps/revoution. Should I drop this to 800 steps/revolution?
Any info on this is greatly appreciated,