I am using MACH3 turn and and I am having a problem with the G76 code. I used the Wizard to thread a .25" end of a 2.16" tube. I don't add Chamfer or taper but I get all sorts of odd paths while threading. First an chamfered cut front to back, next a straight cut then a deeper angled cut ... until it gets to depth. Then it does an reversed chamfer on the back end of the thread. Is this normal? Here is the Gcode:
G00 z2.1
G00 X1.1
M04 S400
M01
M08
G76 x1.0 z1.75 q1 P0.08333 H0.02 I29 C0.1
M9
M5
M30
Any help would be appreciated.
BOb