Siemens SINUMERIK 840Di sl Function Manual page 55

Boundary conditions:
Integral
the basic coordinate system, i.e. prior to kinematic transformation. A programmed frame
(TOFRAME) has no effect, i.e. the function cannot be used for 3D clearance control in the
direction of orientation. The "clearance control" function can be used to implement a
clearance control system with high dynamic response or a 3D clearance control system.
See:
References:
/FB3/ Function Manual Special Functions; Clearance Control (TE1)
/PG/ Programming Manual Fundamentals
The interdependency between input quantity and output quantity is assured through the
relationship illustrated in the following diagram.
Further examples
Please see section "Clearance control with variable upper limit" for an example illustrating
dynamic adaptation of a polynomial limit in conjunction with Adaptive Control (clearance
control). The chapter "Controlling the feedrate" contains an example of adaptive control of
the path feedrate.
Clearance control
The clearance value is calculated by integrating with the machine data:
MD36750 $MA_AA_OFF_MODE[V]=1 (Effect of value assignment for axial override in case
of synchronized actions)
It works in the basic coordinate system, i.e. before transformation. This means that it can be
used for clearance control in the orientation direction (after frame selection with TOFRAME).
Figure 2-7
Synchronized actions
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
evaluation of the input quantity of sensor $A_INA[3]. The offset value is applied in
Clearance control
Detailed description
2.4 Actions in synchronized actions
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