HEIDENHAIN MANUALplus 4110 - Manual (Page 44)

44 3 Machine Mode of Operation
3.2 S
w
itc
h
-On / S
w
itc
h
-Of
f
„ Standard encoder: The axes move to known, machine-based points.
As soon as a reference mark is traversed, a signal is transmitted to
the control. The control knows the distance between the reference
mark and the machine zero point and can now establish the precise
position of the axis.
Monitoring EnDat encoders
If EnDat encoders are used, the control saves the axis positions during
switch-off. During switch-on, the MANUALplus compares for each
axis the position during switch-on with the position saved during
switch-off.
If there is a difference, one of the following messages appears:
„ "Axis was moved after the machine was switched-off."
Check the current position and confirm it if the axis was in fact
moved.
„ "Saved encoder position of the axis is invalid."
This message is correct if the control has been switched on for the
first time, or if the encoder or other control components involved
were exchanged.
„ "Parameters were changed. Saved encoder position of the axis is
invalid."
This message is correct if configuration parameters were changed.
The cause for one of the above listed messages can also be a defect
in the encoder or control. Please contact your machine supplier if the
problem recurs.
„ In case you traverse the reference marks separately for
the X and Z axes, you only traverse in either the X or the
Z axis.