Hey guys, I recently bought a mazak qt10 with a t2 control with a Mitsubishi FREQROL FR-SE spindle controller and have had an issue keeping me from getting it up and running. I inspected the machine at the shop of the previous owner as it was under power and at the time was in production. Everything was working fine and it was making good, repeatable parts. I bought it and had it delivered to my shop, had an electrician install and wire an rpc from American rotary and powered up the machine. I put a piece of stock in the chuck and ran the same program as I had seen run in the previous shop. As the program began all was fine until it made a facing cut, retracted to take another cut, then stopped above the part, the spindle coasted to a stop and I got the alarms: 20 NMI e-stop and 204 spindle controller malfunction. I would later get the same 2 alarms if I was jogging the spindle at high rpms and push spindle stop or even decrease spindle speed button, also coasting to a stop. I went into the program and slowed down max rpm from 3,000 to 1500, 800 then 300. Every time I ran it slower it would get farther in the program and at 300 rpm it finished the program while cutting air. Although no alarms came up this time, this is way too slow to effectively turn a part. The only thing I'm doing different than the previous owner is he was running the machine at 208v 3phase and I'm running 240v with rpc. I was told maybe a step down transformer would fix the issue as it's probably meant for 200v (Japanese standard). Does this sound like over voltage may be my issue? Considering I'm getting the alarms at high rpms near and during spindle braking sequences? I still intend to install a step down transformer but can anyone shed some more light on the issue? Thanks!