Pid loop tuning procedures, Pid loop tuning procedure diagrams – HEIDENHAIN ND 1300 CNC Setup User Manual

Page 39

CNC Setup

PID Loop tuning procedures

Independent PID Loops control the motion and position characteristics of each CNC axis. The PID Loop

characteristics are often different for each machine axis and even more different for each CNC machine.

Also, application requirements and operator preferences are generally different for each system. For these

reasons, no detailed procedure can reliably describe an exact tuning process for all systems. However,

enough is common to many systems to describe a generic process that will help users get started. The

procedure is provided as two flow diagrams of iterative PID value adjustment and performance evaluation.

One diagram pertains to stepper motor systems, and the other to servo motor systems.

PID Loop tuning procedure diagrams

The diagrams illustrate the PID Loop tuning process for stepper and servo motor systems and show the

decisions required to make performance trade-offs. Each flow chart block is described in detail in the

remaining pages of this chapter. References to these descriptions are shown on the diagrams near each

block. The required initial setup parameters are shown in the upper-right corner of each diagram and must

be entered into the CNC Setup screen before following a procedure.

Page reference

Initial conditions:

Enter these values into the

CNC Setup screen before

attempting to perform the

procedure

Flow chart block

PID Loop Tuning Procedures