Post Processors

A Post Processor is needed to translate toolpath information from Mastercam into an NC format the machine tool can interpret. Mastercam provides a default set of Post Processors available with the product installation. Mastercam also has an extensive library of available post processors for use with Mastercam.

Mastercam's Post Processing Department is responsible for development and maintenance of Post Processors for use with the Mastercam product line, as well as support related to Post Processors. Your Mastercam Reseller should be your first contact with all your post requests. Your Mastercam Reseller has received extensive training with the Mastercam product line, including Post Processor development.

If you are unable to contact your Mastercam Reseller, or you need further assistance, you can contact CNC Software's Post Processing Department Monday - Friday, 8:00 a.m. - 5:30 p.m., USA EST at 860-875-5006 or by sending an e-mail to If you are unsure whether your question is Post Processor related or not, please contact Technical Support at

When requesting Post Processor modifications to an existing post processor please follow these guidelines:

  • Be sure you have already tried to contact your Mastercam Reseller for assistance.
  • Provide your contact information, Mastercam version you are running, and the serial number of your SIM.
  • Provide a detailed description of the problem you are having.
  • Provide the make and model of the machine and control.
  • Provide the .PST file that you are using including any additional post related files such as .PSB or .TXT.
  • Provide a simple Mastercam file (MCX, MC9, etc) that illustrates the problems you are having with the post processor. When possibile please narrow down the problem operations or toolpaths that are causing the problems.
  • Provide the "bad" NC code file that is being output from Mastercam. Make sure this code was generated with the Mastercam file you have included.
  • Provide the "good" NC code file that shows the corrections needed. You can make a copy of the "bad" NC file and edit it replacing the bad code with the desired code. Include any additional comments you think may be necessary or helpful.
  • Mastercam X and later customers should use the Zip2Go utility to gather Mastercam part data into a .Z2G file and attach this file to the e-mail.