Hey all,
I've got a NM-145 that's having some strange problems with the z-axis. It seems to be losing it's position. Sometimes when I jog up, the position counter increases on the controller, but the machine does not move. If I home it, the counter will continually increase well beyond the limits of the machine (70+ inches? I don't think so). Eventually, the z-axis will start to move and when it hits the home position, the counter will reset to the appropriate number. This problem only happens with the z-axis. To make matters worse, sometimes it seems to work just fine and I haven't found any reliable explanation for what causes it to work certain times and not others.
I've taken apart the machine, cleaned and lubricated where necessary, and made sure the home switch inside was free of any debris that might be interfering. I would guess the problem is either the motor or an incorrect signal from the controller software (Mach 3 v R3.043.022).
Does anyone have any insight or suggestions? Thanks.