Detailed Description
2.1 Path feedrate F
Feeds (V1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-7
Note
G96, G961 is only active during workpiece machining (G1, G2, G3, spline interpolation, etc.,
where feedrate F is active).
The response of the spindle speed when G96, G961 and G0 blocks are active can be defined
in channel-specific machine data:
MD20750 ALLOW_G0_IN_G96 (G0 logic for G96, G961).
When constant cutting rate G96, G961 is selected, no gear stage change can take place.
The spindle speed override switch acts on the spindle speed calculated.
A DRF offset in the transverse axis does not affect the spindle speed setpoint calculation.
At the start of machining (after G0) and after NC Stop, G60, G09, ... the path start waits for
"nAct= nSet".
The interface signals "nAct = nSet" and "Set speed limited" are not modified by internal
speed settings.
When the speed falls below the minimum speed or if the signal "Axis/spindle stationary" is
recognized, "nAct =nSet" is reset.
A path operation, which has started (G64, rounding), is not interrupted.
Spindle speed limitation with G96, G961
The programming command LIMS can be used to define a maximum spindle speed for the
"Constant cutting rate" function in setting data:
SD43230 SPIND_MAX_VELO_LIMS
(spindle speed limiting for G96/G961)
and in the part program (for the master spindle).
The last value changed (LIMS or SD) is active.
LIMS acts on G96, G961, G97, and can be defined for up to four speed limitations in a single
block in the part program. Spindle number Sn=1, 2, 3, or 4 of the master spindle that is
possible in the particular instance can be programmed in part progam instruction LM[Sn].
Note
When the block is processed, all programmed values are transferred to setting data
SD43230 SPIND_MAX_VELO_LIMS.
Depending on machine data:
MD10710 PROG_SD_RESET_SAVE_TAB[n] (setting data to be updated),
the speed limitation written with LIMS will remain stored after the control system has been
switched off.
When G96, G961, G97 are reactivated, this spindle speed limitation is also activated.
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