just was playing with my nm145 estop is backwards emailed novakon about that also spindle speeds seem iratic were can i get help on mach 3 i know nothing about programing i wish they would give you a learners guide on what to do and how to do it on these things
Join the machsupport forum, which is pretty helpful
ArtSoft USA - Home of Mach3 and LazyCam
Backwards estop: you need to go into mach3's setup "ports and pins", and toggle the polarity of the estop pin.
Spindle speeds: for starters, buy a cheap tachometer from ebay - that way you know exact RPMs.