This is the most common format for standard 2-axis to 4-axis machines. It is a text-based file written in the MP scripting language that handles the translation logic.
Mastercam is a popular computer-aided manufacturing (CAM) software used by machinists and manufacturers to create and optimize G-code for CNC machines. One of the key components of Mastercam is the post processor, which plays a crucial role in converting the CAM software's output into a format that can be read by the CNC machine. However, sometimes the post processor needs to be edited to meet specific requirements or to optimize the machining process. In this article, we will provide an in-depth guide on Mastercam post processor editing, covering the basics, benefits, and best practices.
Editing Mastercam post processors is a targeted, technical task that adapts CAM output to machine-specific requirements. Follow a disciplined workflow: backup, small iterative edits, thorough simulation, and controlled on-machine testing. Properly managed posts reduce machining errors, improve cycle reliability, and standardize shop practices.
Since Mastercam X, the .pst file is no longer a standalone entity. It interacts with the and Control Definition (CD) . mastercam post processor editing
You don’t need to build a 5-axis, dual-spindle Swiss post from scratch. Even skilled integrators take weeks to do that. Start small:
Defines physical machine attributes like travel limits and axis orientation.
Safe tool changes prevent collisions with fixtures, stock, or the machine enclosure. You can modify the ptlchg$ block to ensure the Z-axis retracts to the maximum machine home position ( G28 G91 Z0. ) before commanding a tool rotation or moving the X and Y axes. This is the most common format for standard
A "Block" is the fundamental unit of output. It defines what is printed on a line of G-code.
Change the string text inside the quotes to match your machine tool manual specifications. 5. Step-by-Step Editing Workflow and Safety Protocols
The Ultimate Guide to Mastercam Post Processor Editing A Mastercam post processor is the critical bridge between your digital CAD/CAM design and your physical CNC machine. It translates Mastercam’s internal toolpath data (NCI files) into the specific G-code and M-code language that your machine tool controller understands. One of the key components of Mastercam is
There are several reasons why you may need to edit a post processor:
Open a .PST file to find a highly structured document divided into several functional zones. The Header
The Ultimate Guide to Mastercam Post Processor Editing A Mastercam post processor is the critical bridge between your digital CAM software and your physical CNC machine. It translates the toolpath data on your screen into the specific G-code and M-code language your machine tool understands. While Mastercam includes a vast library of generic posts, maximizing your shop's efficiency often requires custom edits.