Dear friends,
Hopefully anyone here could supply me with some guidance in how to commission this problem that I have encounter on a 3 axis Mitsu MELDAS 64 CNC control. (year 2002)
Here is the description of the scenario:
The Z axis CURRENT reading will start creeping up until it reaches the 100 limit and will generate an alarm. That could be interpreted as mechanical overload of some sort, but not really and here is why: This very same Z axis runs trouble-free on handle mode movements, up and down, slow or quick, and even if we are running a program on MDI mode that has Z axis MOVEMENTS THAT ARE NOT TINNY.
This problem ONLY SHOWS UP whenever we run a MDI program code with very small (i.e 0.05mm) movements. Specially whenever we are trying to machine a ramp shape that require the Z axis to move in very small increments, that is when after a few minutes of running this program, we watch on the DIAG screen (see attached picture) how the reading for CURRENT keeps on going up until it reaches 100 and triggers the alarm. By this time, the servo motor is SMOKING HOT.
I am thinking it might be related to the synchronization of the DYNAMIC brake, but since I am not so familiar with this brand CNC I would not know exactly how to recalibrate. I will appreciate any help.
Thanks a bunch!
peloflex.