CNC Setup Utility Manual
P/N 70000490C - Tuning the Current, Velocity, and Position Controller
All rights reserved. Subject to change without notice.
5-1
10-December-04
Section 5 - Tuning the Current, Velocity, and Position Controller
The CNC has features to automatically (auto-tuning) or manually tune:
current, velocity, and position control loops. Auto tuning must be
performed in the following sequence for best results: current, frequency,
velocity, and position. The auto-tuning features will work in the majority of
the systems. For systems in which the auto tuning does not work,
guidelines are provided for manually tuning the system. In all cases,
before starting a test, energize the servos and move the axis to,
approximately, the middle of its travel. Cancel each test by pressing
Manual
(
F4
) before starting the next test.
Tuning
Modes
From the Software Options menu, select
Motion Setup/Testing
(MST).
From the MST screen, select
TuneMod
(
F6
) to display a pop-up menu
with the tuning modes: Automatic or Manual. Select the tuning mode you
want and press
ENTER
.
Automatic tuning
– requires only an initial start to begin the test and no
parameter entry from the user. The test is performed to completion
without user intervention.
Manual tuning
– requires you to modify parameters and initiate an
iteration of the test by pressing
Start
. After an iteration, you can modify
the parameters again if desired and continue with a new iteration.
From the MST screen, select an axis displayed on the MST screen [type
X
,
Y
,
Z
,
U
, or
S
(spindle)]. The axis you selected is displayed in the top-
right of the MST screen in
Active Axis:
. Press
Tuning
(
F7
) to display a
pop-up menu with the tuning mode tests:
Automatic tuning:
Current Tune, Frequency Tune, Velocity Tune, and
Position Tune.
Manual tuning:
Current Tune, Frequency Tune, Velocity Proportional
(Tune), Velocity Integral (Tune), Position Proportional (Tune), and
(Acceleration) Feedforward Tune.
Automatic
Tuning
Automatic tuning provides:
A description for each of these auto-tuning tests follows.
