Swoop, I appreciate your help. I do know it is a 1998 machine, and will get the serial # and let you know. I'm thinking a solenoid on the brake may be not getting enough voltage, and it drops out, causing the machine to stop. I'm no mechanic, but doing a lot of reading. What are your thoughts on that possibility? I brought the platform controller home with me, and see some need for electronic cleaner on some terminations and contacts.