a couple of questions

[john86126]

a am building a plasma cnc cutter and having trouble with a couple of things one the acme thread the ones im am looking at is the 3/8 4tpi with 4 starts how good would this be also can i use regular acme nuts on a 4 start thread
and also how would i couple these to my stepper shaft

27" by 30"

420Oz nema 23 steppers at 100 tpm

[BobF]

Dumpster makes nuts for some of the multi start acme and couplers. No regular nuts don't work on multi start.
I used 1/2 8tpi 2 start.
http://dumpstercnc.com