Machine data
2.4 Axis-specific machine data
Parameter Manual
252
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Description:
Electronic cam offset for incremental measuring systems with equidistant zero
marks.
When the reference cam signal occurs, the zero mark search does not start
immediately but is delayed until after the distance from REFP_CAM_SHIFT.
This ensures the reproducibility of the zero mark search through a defined
selection of a zero mark, even with temperature-dependent expansion of the
reference cam.
Because the reference cam offset is calculated by the control in the interpo-
lation cycle, the actual cam offset is at least REFP_CAM_SHIFT and at most
REFP_CAM_SHIFT+(MD34040 $MA_REFP_VELO_SEARCH_MARKER*interpolation cycle)
The reference cam offset is effective in the search direction of the zero
mark.
The reference cam offset is only active if existing cam MD34000
$MA_REFP_CAM_IS_ACTIVE=1.
Description: The value displayed corresponds to the distance between exiting the reference
cam and the occurrence of the reference mark. If the values are too small,
there is a risk of not being able to determine the reference point due to
temperature reasons or varying operating times of the cam signal. The dis-
tance travelled may serve as a clue for setting the electronic reference cam
offset.
This machine data is a display data and can therefore not be changed.
34092 REFP_CAM_SHIFT A03, A11 G1,R1
mm, degrees electronic cam offset for incremental measuring systems DOUBLE Reset
-
- 1 0.0, 0.0 0.0 - 2/2
34093 REFP_CAM_MARKER_DIST A03, A11 R1
mm, degrees Reference cam/reference mark distance DOUBLE PowerOn
-
- 1 0.0, 0.0 - - ReadOnly
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