Travel With Limited Torque/Force Foc - Siemens SINUMERIK 840D Function Manual

Enabling the fixed stop alarms
The following machine data can be use to set whether the fixed stop alarms
● Alarm 20091 "Fixed stop not reached",
● Alarm 20094 "Fixed stop aborted"
are displayed:
MD37050 $MA_FIXED_STOP_ALARM_MASK (enable of the fixed stop alarms)
Settable functional behavior for fixed stop alarms
The following machine data can be used to set that the function is not aborted when function-
specific alarms occur:
● Alarm 20090 Travel to fixed stop not possible
● Alarm 20091 Fixed stop not reached
● Alarm 20092 Travel to fixed stop is still active
● Alarm 20093 Standstill monitoring at fixed stop has triggered
● Alarm 20094 Travel to fixed stop aborted
MD37052 $MA_FIXED_STOP_ALARM_REACTION (reaction to fixed stop alarms)
Alarm suppression after new programming
Travel to fixed stop can be used for simple measuring processes.
For example, it is possible to carry out a check for tool breakage by measuring the tool length
by traversing onto a defined obstacle. To do so, the fixed stop alarm must be suppressed. When
the function for clamping workpieces is then used "normally," the alarm can be activated using
part program commands.
3.2.9

Travel with limited torque/force FOC

Function
Using the "Force Control" function to traverse with limited torque/force, when traversing, the
maximum permissible torque/force can be limited to a percentage of the maximum possible
axis torque. The limit value can be changed at any time, also while the axis is traversing. The
changes can be realized in the interpolator clock cycle, dependent on distance, time or on any
other variable. The "Force Control" function can also be programmed in synchronized actions.
The function can be permanently activated, or block related.
Programming
Syntax
FOCON[<axis>]
FOCOF[<axis>]
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
F1: Travel to fixed stop
3.2 Detailed description
109