Originally Posted by
jcc3inc
Sir,
You will need to ask the rack supplier what his accuracy specs are. We used to make height gauges using precision rack; it came in 11" lengths and we were shooting for .0005" accuracy or better. When using short sections of rack, you can correct for error every 11" and have an overall accuracy that is very good.
The commercial rack that we used on our cutting machines came in 6 foot lengths. I checked overall accuracy of a piece just for general information, and it was within .020" in 6 feet. We did not specify the accuracy however as the rack was used on plasma and oxyfuel machines that did not require milling machine accuracy.
Regards
Jack C.