Mastercam Post Processor Editing Access

Refer to the Mastercam Post Processor User Guide to understand the variable definitions and logic structures. 4. The Anatomy of a Mastercam Post A .pst file is structured into several sections: A. Header/Initialization

ptlchg$ #Tool change output ptoolcomment "G00 G91 G28 Z0.", e$ "M01", e$ *t$, "M06", e$ Use code with caution. Advanced Editing: Using Variables and Logic

pbld, n$, *t$, "M06", e$ # Existing tool change line pbld, n$, "M01", e$ # New line added to output M01 after the tool change

Use the modified post to generate the NC code. mastercam post processor editing

Before changing any lines of code, you must understand the file types and structures that Mastercam uses to generate G-code. File Extensions (.PST vs. .MP)

Changing how and when M08 (flood) or M07 (mist) are triggered.

A forum user wanted an M01 (optional stop) after every tool change. The solution requires editing two specific post blocks: psof$ (start of file) and ptlchg$ (tool change). Refer to the Mastercam Post Processor User Guide

In MP language, the $ indicates a "pre-defined NCI variable" (data coming from Mastercam).

This text file contains the logic, variables, and formatting instructions. It dictates how the G-code is structured.

Your controller chokes on I/J/K arc definitions (typically for older controls or routers) or prefers R values. File Extensions (

Edit the pheader$ post block to add company names or file information to the top of every G-code file. 7. When to Call a Reseller

Defines the physical parameters of the machine (e.g., axis limits, travel, coolant options).

While Mastercam provides generic posts for standard machines, almost every CNC shop requires customized post processor editing to maximize efficiency, protect expensive tooling, and automate repetitive tasks. This comprehensive guide covers the architecture, editing process, and safety protocols for modifying Mastercam post processors. 1. Understanding Mastercam Post Processor Architecture

Or, if your machine uses Flood (M8) and Thru-spindle (M88), you change the string entirely: result = force$ ("M88"), e$