Siemens SINUMERIK 840D sl Function Manual page 457

5.9.3 Electronic weight compensation with travel to fixed stop
SIMODRIVE 611 digital
With NC SW 6 and SW 5.1 SIMODRIVE 611 digital and earlier, both functions "electronic
weight compensation" and "travel to fixed stop" can be used simultaneously, However, the
following features must be observed:
Interaction with traverse against fixed stop
The electronic weight compensation may not be used to offset the zero point for the fixed
stop torque or fixed stop force as it is unsuitable for this purpose.
● If, for example, the axis requires 30% weight compensation in a case where 40% fixed
● If 40% fixed stop torque is programmed in the other direction (in the opposite direction to
● If the axis needs, for example, a weight counterbalance of 30%, then it is not possible for
These properties of traveling on fixed stop in suspended axes are defined by the option of
torque limitation in the drive. These properties are neither improved nor worsened by
counterbalance.
SIMODRIVE 611 digital
A torque limitation which is lower than the force due to weight of the drive can also be set in
the NC for travel to fixed stop. In doing this, a torque/force limit is evaluated by the NC. This
torque/force limit is operative in addition to the limits set in the drive
● Current,
● Force/torque,
● Power, pull-out power,
● Setup mode
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
stop torque is programmed in the same direction, then the actual torque with which the
axis presses against the fixed stop only corresponds to 10% of rated torque.
weight compensation, i.e. in direction in which axis would drop) in the same situation
described above, then the actual torque with which the axis presses against the fixed
stop corresponds to 70% of rated torque.
the axis to approach a fixed stop if less than 30% fixed stop torque is programmed. The
drive torque would be limited so severely that the axis could no longer be kept under
control and would drop!
Electronic weight compensation (vertical axis)
Compensations (K3)
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