Siemens SINUMERIK 840DE SL - Page 1458

Detailed Description
2.4 Referencing with incremental measurement systems
Reference Point Approach (R1)
2-18 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Features of phase 3
• Feed override active
• The feed stop (channel-specific and axis-specific) is active
• NC-STOP and NC-START are active
Special feature of phase 3
If the assigned distance between the encoder zero mark and the reference point, i.e., the
sum of the reference point distance and the reference point offset:
MD34080 $MA_REFP_MOVE_DIST (reference point distance)
MD34090 $MA_REFP_MOVE_DIST_CORR (reference point offset)
is less than the deceleration distance that is needed to stop the axis on the reference point
based on the reference point positioning velocity:
MD34070 $MA_REFP_VELO_POS (reference point positioning velocity)
the machine axis first stops "behind" the reference point and then moves back to the
reference point.
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Fig. 2-10 Reference point distance plus reference point offset smaller than braking distance