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General Mach Discussion / Lathe Screwcutting problem
« on: November 14, 2008, 03:15:58 PM »
Hi,
I'm using the latest version of Mach 3, V3.042.18 and I have a lathe threading problem.
On the first pass of the tool I get a different feed to the one programmed in the G76 canned cycle, the same when using G32.
For example if I set a pitch of 1.411mm (18tpi) the first pass of the tool shows a feed of 1.8mm,as shown by the DRO, then all the rest of the passes are correct at 1.411.
I know it's me but I can't see what I'm doing wrong.
Jim.
I'm using the latest version of Mach 3, V3.042.18 and I have a lathe threading problem.
On the first pass of the tool I get a different feed to the one programmed in the G76 canned cycle, the same when using G32.
For example if I set a pitch of 1.411mm (18tpi) the first pass of the tool shows a feed of 1.8mm,as shown by the DRO, then all the rest of the passes are correct at 1.411.
I know it's me but I can't see what I'm doing wrong.
Jim.