Ahhh, the Z was going at about 245mm/rev hmmm could this be the problem. If so how do I get it to follow the speed set by the 'F'
A
That would be about correct for the example you gave, ie your revs were 120rpm and pitch was 2.1mm so that would mean 120 x 2.1 = 252mm/min
In my example above I was probably getting the terminology wrong.
Can you do a single start thread no problem?
Hood
Edit
just read again, were you meaning 245mm/rev like you said or per min?