We have 2 2011 MA0600HB mills (our first Okumas). Having mostly Fanuc controls up to this point, there is a learning curve with the control (OSP-P200M), but are OK for the most part. We have the Matrix tool mags, which are great when running, but can be a bear (and dangerous) recovering. Recovery mode allows for a single step at a time (forward or backward), which works great unless there is an actual problem (switch not making, etc.). When they were less than a month old, an Okuma tech was trying to recover, and he entered a sequence number that was 2 or 3 steps ahead of where the machine actually was, and crashed the carrier hard into a couple of tool racks.
Chip management can be an issue also. Mainly, coolant tank design is lacking. Chips get out of the machine OK, but a lot of chips get past the magnetic conveyor and into the tank. Also tank is not deep enough. With tons of wash coolant, tank level drops considerably while running, causing our thru-spindle coolant unit to alarm out.
But the machines, overall, have been a positive experience.
Note: I am an in-house service tech...not an operator or programmer.
