Siemens sinumerik 840d Programming Manual page 161

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With G code COMPON block transitions are only

constant in speed, while acceleration of the

participating axes can be in jumps at block

transitions. This can increase oscillation on the

In addition, in SW 4.4 and higher:

With G code COMPCURV, the block transitions are

with constant acceleration. This ensures smooth

velocity and acceleration of all axes at block

transitions.

COMPON/COMPCURV

Machine manufacturer

Three machine data are provided for the compressor

• $MC_COMPRESS_BLOCK_PATH_LIMIT

A maximum path length is set. All the

blocks along this path are suitable for

compression.

Larger blocks are not compressed.

• $MA_COMPRESS_POS_TOL

A tolerance can be set for each axis. The

generated spline curve does not deviate by more

than this value from the programmed end points.

The higher these values are set, the more blocks

can be compressed.

• $MC_COMPRESS_VELO_TOL

The maximum permissible path feed deviation

with active compressor can be preset in

conjunction with FLIN and FCUB.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition

Activate compressor

Deactivate compressor

5.3 Compressor COMPON/COMPCURV

Special Motion Commands

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