Originally Posted by
Karl_T
Great info here, in a better format than I've come accross.
I'm programming my <Camsoft> lathe to do G76.
I have a question on Z start. Will the control always start threading at the current Z position and then go to Z end speced in G76 line 2? Or will it error if you're too far away? In other words, how does the control know how long the threading pass is?
Second, left hand threads. Do you just use all negative values and cut on the backside of your part?
Karl
i always set my z to start 1.5 turns from start of threads
for left hand threads i use a holder that will accomadate both left and right thread inserts and all i have to do is reverse the spindle
referring to cogsman the last 2 digits in the first g76 line is determined by the angle of your threads which is normally 1/2 of the included angle of the thread
If you can ENVISION it I can make it