Siemens SINUMERIK 840D sl Function Manual page 236

B1: Continuous-path mode, Exact stop, Look Ahead
4.7 Tolerance and compression of G0 blocks
G0 tolerance factor
The tolerance factor for rapid traverse movements is only effective if both conditions are met:
1. One of the following functions is active:
– Compressor function: COMPON, COMPCURV, or COMPCAD
– Smoothing functions: G642 or G645
– Orientation smoothing: OST
– Orientation smoothing: ORISON
– Smoothing for path-relevant orientation: ORIPATH
2. Several (≥ 2) consecutive G0 blocks in the part program.
For a single rapid traverse block, the G0 tolerance factor is not effective, as the lower
tolerance always applies (workpiece machining tolerance) at the transition from a non rapid
traverse motion to a rapid traverse motion (and vice versa).
Compression
Compression of rapid traverse blocks is activated with the commands COMPON, COMPCURV, or
COMPCAD. See Chapter: "Compression of blocks for linear and circular movement (Page 227)"
Parameter assignment
G0 tolerance factor
The G0 tolerance factor is set via the channel-specific machine data:
MD20560 $MC_G0_TOLERANCE_FACTOR (tolerance factor for G0)
The G0 tolerance factor can be both greater or less than 1.0. If the factor equals 1.0 (default
value), the same tolerances are effective for non rapid traverse movements as for rapid
traverse movement. Normally, the G0 tolerance factor is set to ≥ 1.0.
Compressing G0 blocks
The compression of G0 blocks is set for specific channels using the hundreds position in the
machine data:
MD20482 $MC_COMPRESSOR_MODE = <value>
Value
0xx
1xx
2xx
3xx
A detailed description of MD20482 can be found in:
References
Function Manual, Special Functions; Multi-Axis Transformations (F2); Section: "Compression
of the orientation"
236
Meaning
Circular blocks and G0 blocks are not compressed.
Circular blocks are compressed. Only COMPCAD.
G0 blocks are compressed.
See also MD20560 $MC_G0_TOLERANCE_FACTOR or NC command STOLF
Circular blocks and G0 blocks are compressed.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions