Hello. I could use help G76 programming the threads mentioned above on a cnc lathe with fanuc controls. Material is 86L20. Threads are 1.5 long. I have never done anything like this and would definitely appreciate help. Thanks.
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Most CAM programs will generate the G code to do exactly what you want. The Z start point is offset for the second lead. You just need to make sure that you are using the correct tool profile so there is proper clearance.
If you can use a G32 cycle, it is more adaptable.
Jim Dawson
Sandy, Oregon, USA
Thanks for reply Jim. How far out would I move Z starting point for second G76 pass to make the threads double lead? Still confused. This part has me stumped. I have cut acme threads before but never external acme stubs with double lead.
Jim Dawson
Sandy, Oregon, USA