Examples Of Adaptive Control; Clearance Control With Variable Upper Limit - Siemens SINUMERIK 828D Function Manual

Examples

3.3 Examples of adaptive control

3.3 Examples of adaptive control
General procedure
The following examples use the polynomial evaluation function
1. Representation of relationship between input value and output value (main run variables
2. Definition of this relationship as polynomial with limitations
3. With position offset: Setting the MD and SD
4. Activation of the control in a synchronized action
3.3.1

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 3-1
144
in each case)
– MD36750 $MA_AA_OFF_MODE (Effect of value assignment for axial override in case
of synchronized actions)
– SD43350 $SA_AA_OFF_LIMIT (optional) (Upper limit of the offset value $AA_OFF in
case of clearance control)
Clearance control with variable upper limit
.
SYNFCT()
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
Synchronized actions