Siemens SINUMERIK 840C - Manual (Page 280)

07.97 6 NC Machine Data (NC MD), NC Setting Data (NS SD)
6.6.1 General MD bits (general bits)
Bit 1 Bit 1 = 0 All zero point offsets are deselected with G53 (G54-G59 + ext. ZO).
Bit 1 = 1 G53 has same effect as @706, all zero offsets (G54-G59 + ext. ZO),
DRF and PRESET are deselected with G53 or with @706. Tool offset
(TO) is not deselected.
Suppress with
@706
Suppress with
G53
1st 2nd 3rd 4th
settable zero offset
G56
Coarse setting
Fine setting
PRESET offset
DRF offset (with handwheel)
External ZO (from PLC)
2nd programmable ZO (G59)
1st programmable ZO (G58)
G55 G54 G57
Suppress with
@706 or G53
1st 2nd 3rd 4th
settable zero offset
G56 G55 G54 G57
Bit 1 = 0 Bit 1 = 1
Bit 0 Run the length compensation even for non-programmed axes (840C (T)): If a
modification of the tool length compensation (e.g. deselection via D0) produces a
traversing path in an axis that is not programmed in this block, traversing is carried
out nonetheless. If this bit is not set, traversing is carried out only if the axis has
been programmed.
Programming example for the 840C (T):
.
.
.
N5 G18 G0 X0 Z0 LF
D3 ....Type 3 (turning tool)
N10 G01 F200 D3 X10 LF Length 1 30
N20 Z30 LF Length 2 20
.
.
.
If the bit is set, the length compensations are run in block N10 already to position
Z20.
If the bit is not set, the Z axis is not moved to position Z50 (Z30 + length
compensation 2) until block N20 is processed.
This function is active only for 2 axes in the mode group.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–95
SINUMERIK 840C (IA)