Siemens SINUMERIK 802D sl Function Manual page 318

Reference Point Approach (R1)
18.2 Referencing with incremental measuring systems
Characteristics of traversing to the reference point cam (phase 1)
● The feedrate override and feedrate stop is in effect.
● The machine axis can be stopped/started.
● The cam must be reached within the traversing distance in MD34030
● The machine axis must come to a halt at the cam, otherwise a corresponding alarm is
Characteristics when synchronizing with the zero pulse (phase 2)
● Feedrate override is not active. Feedrate override 100% is active. Termination occurs at
● Feedrate stop is active, the axis comes to a halt and a corresponding alarm is displayed.
● The machine axis cannot be stopped and restarted with NC stop/NC start.
● Monitoring of the zero mark is active with MD34060 REFP_MAX_MARKER_DIST.
Characteristics of traversing to the reference point (phase 3)
● The feedrate override and feedrate stop is in effect.
● The machine axis can be stopped and re-started with NC stop/NC start.
● If reference point offset is smaller than the braking distance of the machine axis from the
Different motion sequences during referencing:
Referencing type
With reference cam (MD34000
REFP_CAM_IS_ACTIVE = 1)
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REFP_MAX_CAM_DIST, otherwise a corresponding alarm is triggered.
triggered.
feedrate override 0%.
reference point positioning velocity to stop, the reference point is approached from the
opposite direction.
Synchronizing pulse before cam, reference
coordinate before synchronizing pulse =
without reversal:
(MD34050
REFP_SEARCH_MARKER_REVERSE = 0)
Synchronizing pulse
(zero mark, BERO)
Motion sequence
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0