Mastercam Post Processor Editing

When you edit a post and run it through Mastercam, the software generates a .err file in the same folder. This is your diagnostic report. Learn to read it immediately; it will tell you exactly which line number caused a syntax error or a math crash.

Mastercam post processors use a specific syntax for variable handling. Understanding the suffixes is critical.

You can perform math on the fly.

# Reduce feedrate for deep drilling
calc_feed = fr$ * 0.8
"F" calc_feed$

The Problem: When machining on a rotary axis, your machine wants to spin 10,000 degrees instead of turning back 10 degrees.

The Solution: Find the rot_feed or ctable logic. Look for use_rotm variable. mastercam post processor editing

Edit:

use_rotm : 1     #Use rotary axis shortest direction?

Change from 0 to 1 or vice versa depending on your machine’s preference. When you edit a post and run it

When your post crashes or outputs garbage G-code, use the MP.DLL Debugger: