We program all of our Fadal machines in format 2 and have for years. Our 6030 started acting off last night. When the spindle slows and reverses at the bottom of the hole the motor and attached sheet metal shake. I called out our local maintenance company and the motor mounts are all good and the belts were just replaced last year. He switched to format 1 and the problem doesn't exists. We also tried both high and low gear. The tech that came out didn't really know what else to do and I didn't want to play the guessing game. Does anyone have any idea why the problem only happens while in format 2?

Thanks for reading.