I am using a TM 4800 table with a Flexcut 80. Have been using it for a year now. For some reason, I'm having a problem cutting 1/4" HR plate today. Machine pierces and then does not move. Torch fires for about 10 seconds and then stops. 60amp ; 131 ArcVoltage; 70ipm. Cut is fine once it gets going. Any ideas? I've called tech support, but have been waiting for over 4 hours with no return call. Thanks in advance. Pete