Examples Of Adaptive Control; Clearance Control With Variable Upper Limit - Siemens SINUMERIK 840D sl Function Manual

4.3

Examples of adaptive control

General procedure
The following examples use the polynomial evaluation function SYNFCT().
1. Representation of relationship between input value and output value (main run variables
in each case)
2. Definition of this relationship as polynomial with limitations
3. With position offset: Setting the MD and SD
– MD36750 $MA_AA_OFF_MODE (Effect of value assignment for axial override in case
– SD43350 $SA_AA_OFF_LIMIT (optional) (Upper limit of the offset value $AA_OFF in
4. Activation of the control in a synchronized action
4.3.1

Clearance control with variable upper limit

Example of polynomial with dynamic upper limit
For the purpose of clearance control, the upper limit of the output ($AA_OFF, override value
in axis V) is varied as a function of the spindle override (analog input 1). The upper limit for
polynomial 1 is varied dynamically as a function of analog input 2.
Polynomial 1 is defined directly via system variables:
Figure 4-1
$AC_FCTLL[1]=0.2
$AC_FCTUL[1]=0.5
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
of synchronized actions)
case of clearance control)
Clearance control with variable upper limit
4.3 Examples of adaptive control
; Lower limit
; Request Value of upper limit
Examples
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