Haas VF-2. Magnatek drive. The actual spindle speed is approximately 50% of the commanded and its erratic. example, s6000, actual bounces between 2800 and 3000.
If you command it at 10 rpms, you can count the rpms and it is off. at the very slow speed you can see the varriance in rpm as well.
I swapped the magnatek drive unit from the machine next to it, so thats not the problem.
It's not producing any alarms either.
I'm thinking the Mocon board but I wanted to see if anyone had any thoughts before I schedule a service.
Thanks