Heidenhain (or anything else!) nc code spec

[kefex]

Hey there, folks,

I am attempting to write a post-processor for some CNC software, and I am having trouble locating a specification for Heidnehain CNC language.

I have to read in and parse the code, looking for certain statements which I must alter to fit the kinematics of the head of the target machine.

But I can only find incomplete documentation. Does anyone know where I might find such documentation?

I've managed to track down the RS247D spec for the EMC project, but it's apparent there are several statements in the Heidenhain code which aren't covered there. For instance:

6 L A+0 B+0 R0 FMAX M94

Any help would be greatly appreciated!

Thanks,

Kevin Atkinson

[anorec]

L A+0 B+0 R0 FMAX M94

You should find all you need on http://www.heindenhain.com

Here what I read on whatever user's manual about M94 code

Reducing display of a rotary axis to a value less than
360°: M94
Standard behavior
The TNC moves the tool from the current angular value to the
programmed angular value.
Example:
Current angular value: 538°
Programmed angular value: 180°
Actual path of traverse: –358°
Behavior with M94
At the start of block, the TNC first reduces the current angular value
to a value less than 360° and then moves the tool to the programmed
value. If several rotary axes are active, M94 will reduce
the display of all rotary axes. To have the TNC reduce the display
for a specific rotary axis only, enter the axis after M94.
Resulting NC blocks
To reduce display of all active rotary axes:
L M94
To reduce display of the C axis only:
L M94 C
To reduce display of all active rotary axes and then move the tool in
the C axis to the programmed value:
L C+180 FMAX M94

Duration of effect
M94 is effective only in the block in which M94 is programmed.
M94 becomes effective at the start of block.