Tolerance And Compression Of G0 Blocks - Siemens SINUMERIK 828D Function Manual

B1: Continuous­path Mode, Exact Stop, LookAhead

3.7 Tolerance and compression of G0 blocks

3.7 Tolerance and compression of G0 blocks
Function
The function "Tolerance and compression of G0 blocks" allows rapid traverse motion to be executed faster.
It consists of the following components:
1. Configuring/programming an independent tolerance factor for G0 motion
Using this factor, the tolerances for G0 motion can be set differently to the workpiece machining tolerances.
2. Compressing G0 blocks
If this functionality is selected, for active NC block compression, in addition to traversing blocks with G1
(straight line interpolation), traversing blocks with G0 (rapid traverse) are compressed.
Effectiveness
1. The G0 tolerance factor is only effective, if:
• One of the following functions is active:
- Compressor functions: COMPON, COMPCURV and COMPCAD
- Smoothing functions: G642 and G645
- Orientation smoothing: OST
- Orientation smoothing: ORISON
- Smoothing for path-relevant orientation: ORIPATH
• several ( ≥ 2) consecutive G0 blocks in the part program.
For a single G0 block, the G0 tolerance factor is not effective, as at the transition from a non G0 motion to a
G0 motion (and vice versa), the "lower tolerance" always applies (workpiece machining tolerance)!
2. The compression of G0 blocks becomes effective:
• For NC block compression (COMPON, COMPCURV or COMPCAD).
Configuration
G0 tolerance factor
The G0 tolerance factor is set channel-specific with the 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), then the
same tolerances for G0 blocks are effective as for non-G0 blocks. Normally, the G0 tolerance factor is set to ≥
1.0.
206
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions