User guide

Set Up 2 Page Description (continued)
Tuning the Cutter
The right-hand side of the Cutter Tune page is used to test repeatability. The tester
is permanently enabled. “Test Reset” may be pressed at any time to begin a fresh
test. For example, after changing any tune value the test may be reset to begin a
fresh test. Repeatability is shown in length and time formats. Length is the most
important. However, if time is fluctuating excessively this could indicate poor
puller or cutter repeatability.
Common Tuning Controls
There are four values and two check boxes that are used to tune the cutter drive .
These values are Inertia Ratio, Friction, Response and Time Constant. Check
boxes to enable Feedforwards and Time Constant are provided.
Please refer to
Control Techniques documentation for additional information and setting descrip-
tions for Inertia Ratio, Friction Response and Time Constant.
The four values in the top section are Torque, Follower Error, Shunt and
Foldback. These values are read-only and help to show the effects of tuning.
Cutter Drive - Tune Results / Repeatability
To access the Cutter Tune Page:
1
Press the Set Up 2 tab.
2
Press the Cutter Tune sub-tab.
4-84 l Operation
(continued)