My lightmachine TMC1000 looses registration when ever I have a feedrate greater than 5 ipm. At 5 ipm it runs without error, any faster and it's a disaster. I am using an old pentium 133 machine and everything on the unit is original. The three axis all are in good shape don't appear to be slipping. Any suggestions on how to get a faster feedrate. The manual claims it is capable of 20+ ipm. Thanks