Multi cut threading macro program example using G76Custom Macro Using variables for the Programming : Ideal application for the use of Variable programming (i.e. Custom Macro Programming) on a CNC Lathe : As such the usage is covering very vast application area. You name it and it can be coded using macros. But, by and large following are the core application areas : 1) Threading applications like variable lead threading, Multi start threading, Square and Trapezoidal threading, circular form non-standard type threading ; 2) Multi-start worm cutting ; 3) Face and radial grooving of non-standard type; 4) Design one’ s own cycle of any type. Example : Carrying out 4 start threading of the size M16 x 2.0 mm pitch. Write a custom Macro “A” Program for the same. Use Multi-cut threading cycle G76. Use following data : Data : i) O. D. = 15.8 mm (A) Custom Macro A for FANUC OT-D/C systems O0001 (4 START THREADING); N1; (B) Custom Macro “B” for FANUC Oi Mate TB/TC system : O0001 (4 START THREADING); N1; ____________ Jasmin C. Shah, CNC Application Engineering and Programming consultant Date : 13th September, 2006
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