If you are programming a lathe or a mill-turn with the 828D, the post must support Siemens ShopTurn commands. This allows for graphical simulation directly on the CNC screen without back-plotting.
The post should convert Mastercam’s standard drilling and tapping operations into Siemens cycle format, not long-hand G-code. This keeps the program size small and allows the operator to edit peck depths or dwell times easily at the control.
The 828D distinguishes between external subprograms (calling another file) and internal subprograms (LABEL jumps). Your post needs to output CALL commands correctly based on how you set up your Mastercam subprograms.
Your post must allow you to activate CYCLE832 via Mastercam’s "Text" or "Misc" integers. Without this, your finishing passes will lack the smooth acceleration/deceleration needed for die and mold work. siemens 828d post processor for mastercam
MCALL CYCLE83(1., 0., 1., -25., , 1., , 1., 1., 1., 1., 1., 1.) MCALL CYCLE84(1., 0., 1., -12., , 1., , 1., 1., 1., 1000., 2000.) MCALL Notice how the Siemens post uses MCALL to activate the cycle and parentheses for all parameters. This is what makes the 828D so powerful.
Most CNC controls read G-code line-by-line in a modal fashion. The Siemens 828D, however, operates heavily on software boundaries and parameterized cycles (CYCLE83, CYCLE84, CYCLE832). It also uses different codes for High-Speed Machining (HSM).
Siemens handles plane switching differently for drilling cycles. A standard post may crash on a 5-axis or right-angle head operation. The 828D post must properly handle PL (Plane selection) commands. If you are programming a lathe or a
Before running any Mastercam program, ensure your 828D is set to "DIN/ISO" mode, not "ShopMill" mode. Press the "Program" button, then select "New" and choose "DIN/ISO" . Trying to run G-code in ShopMill mode will result in a syntax error.
When purchasing or customizing a post for the 828D, ensure it includes the following:
Using the wrong post processor for a Siemens 828D is like speaking French to a German engineer—neither side understands the other. A dedicated Mastercam post processor for the 828D unlocks the true potential of the control, allowing you to use advanced cycles, high-speed machining, and rigid tapping without manual editing. This keeps the program size small and allows
Bad Output (Standard FANUC post):
Mastering the Siemens 828D: The Ultimate Guide to the Mastercam Post Processor
The Siemens 828D is one of the most powerful and versatile CNC controls for shop-floor machining. It bridges the gap between basic pocket milling and complex, multi-axis interpolation. However, its power comes with a unique programming language (DIN/ISO with Siemens cycles) that differs significantly from standard FANUC or Haas controls.