VALCO MELTON D-90, Manual

Page: 81 / 150

5-42 Valco Cincinnati, Inc.
Section 5 – Setup MM125 - D-90 Hot Melt Unit
AutoTune Feature
The Auto Tune feature will optimize the PID settings for each zone that is
enabled when the Auto Tune is started. The Auto Tune feature can take up to
eight hours to complete and the power must not be turned off during this
process. It is recommended to only enable zones that need their PID values
adjusted to reduce the time taken for tuning.
The AutoTune Feature is located in the PID Screen and can ONLY be
accomplished under the password Level 3!
Changing out gun/hose pairs or moving
a gun or hose from it’s original
AutoTune position, will require that
AutoTune be run again to optimize the
PID settings again.
PID Settings - Continued
The PID settings are factory set for each zone. The factory PID settings
complement Valco Melton’s Tank, Hose, and Gun watt densities (Tank 1
screen shown. Use left/right keys to access other screens).
CAUTION! CAUTION! CAUTION! CAUTION! CAUTION! Changing these settings is not recommended. Changes
should be made only by authorized ValcoMelton
personnel.
In the case where a special temperature zone is used (example: coating
head) and its temperature does not regulate properly, the Auto Tune function
can be used to set the PID settings.