Contour/Orientation Tolerance - Siemens SINUMERIK 840D sl Function Manual

B1: Continuous-path mode, Exact stop, Look Ahead

4.6 Contour/Orientation tolerance

4.6 Contour/Orientation tolerance
Parameter assignment
Machine data
● Contour tolerance / orientation tolerance
MD33100 $MA_COMPRESS_POS_TOL[<axis>] = <value> (maximum tolerance with
compression)
Via the axis-specific machine data, the maximum permitted contour deviation (contour
tolerance) or angle deviation of the tool orientation (orientation tolerance) of each axis is
set. The machine data is effective with the following functions:
– Rounding: G642, G643, G644, G645
– Compressor: COMPON, COMPCURV, COMPCAD
The machine data is not effective with the rounding function G641. The programmable
distance to the block transition with ADIS= or ADISPOS= is used for G641.
● Rounding mode
MD20480 $MC_SMOOTHING_MODE (rounding behavior with G64x)
● Compressor mode
MD20482 $MC_COMPRESSOR_MODE (mode of compression)
● Rounding G645
MD33120 $MA_PATH_TRANS_POS_TOL (maximum contour deviation for rounding
G645)
Effective on rounding tangential, but not continuously curved block transitions (e.g. circle -
straight line)
Setting data
● Channel-specific contour tolerance
SD42465 $SC_SMOOTH_CONTUR_TOL (maximum contour deviation)
● Channel-specific orientation tolerance
SD42466 $SC_SMOOTH_ORI_TOL (maximum angular deviation of the tool orientation)
● Channel-specific orientation tolerance with rounding with OST
SD42676 $SC_ORI_SMOOTH_TOL (tolerance for smoothing with orientation on rounding)
● Channel-specific orientation tolerance with rounding with ORISON
SD42678 $SC_ORISON_TOL (tolerance for smoothing the orientation)
Programming
Syntax
CTOL = <value>
OTOL = <value>
ATOL[<axis>] = <value>
232
The higher the value, the more short blocks can be compressed into a long block.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions