Lenze ETC Motion Control - Manual (Page 210)

Machine constants
Configuration of axes − Operating range
MK_GRUNDOFFSET
4
4.8
4.8.1
l
210 EDSTCXN EN 2.0
4.8 Configuration of axes − Operating range
4.8.1 MK_GRUNDOFFSET
This machine constant is the offset of the mechanical zero point of the
machine in relation to the zero point of the position measurement system.
The unit is millimeters for linear axes and degrees for rotation axes.
4.8.2 MK_SW_ENDS_MINUS, MK_SW_ENDS_PLUS
This machine constants define the positive and negative traversing range
limit of the mechanics. The millimeter unit is used for linear axes and
degrees for rotation axes. Use G26 to switch on the monitoring function. See
also MK_VOREINSTELLUNG.
The values refer to the machine zero point (home position + basic offset) and
not to the zero point of the position measurement system.
4.8.3 MK_SW_ENDS_MIT_RAMPE
This machine constant indicates whether a controlled deceleration or an
abrupt stop should take place when the traversing range limits are
exceeded.
Value Meaning
0 When the SW limit switches are reached, there is an abrupt stop.
1 Decelerate on the programmed path with the current deceleration ramp. In the
process, set the traversing range limit in such a way that the axis can stop before
reaching the mechanical limit stop by means of the set acceleration values.
2 Look−ahead software limit switches. The process involves the calculation of
whether the corresponding software limit switch will be reached by means of the
current axis speed and the configured max. axis deceleration ramp. If this is the
case the axis in question is decelerated to such an extent that it comes to a halt at
the set software limit. All of the other axes which participate in the path are
stopped as in the case of 1.
Caution: The correct functioning of this function can only be guaranteed if a value
less than 180
°
is entered in MK_LAH_GRENZWINKEL.
4.8.4 MK_SCHLEPPGENAUHALT
This machine constant defines the limit value of the system deviation of the
individual axes for exact positioning with following error monitoring in
[mm] or [degrees]. This function must be activated with G60.(
¶ 118).
4.8.5 MK_GENAUHALTZEIT
This machine constant defines the time in seconds by which the extent of
the following error of an axis must have constantly fallen short of the
configured value under MK_SCHLEPPGENAUHALT, before the next function
can be executed. This MC is only effective if the "Genauhalt mit
Schleppabstandsüberwachung" ("Exact positioning with following error
monitoring") function is switched on. The default value is 0.