Specifications

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3BUS 208 000 R1301 77Platform Tuning
Motor Controller Setup (Fincor and Lovejoy)
The direction and speed of the AC motor which drives the Scanning Platform, is
managed by the motor controller, located in the end column of the Scanning
Platform. The motor controller determines how much torque to apply when the
head package encounters resistance.
At initial power-up, before head position calibration or tuning, the Scanning
Platform will move at 50 percent of its maximum speed whenever the JOG push
buttons are pressed. The maximum speed is determined by the FMAX adjustment
on the motor controller and this speed is used when moving off–sheet from a position
out on the scanner.
The motor controller will also affect the perceived tuning of the Scanning Platform.
The actual velocity of the head package movement has a non-linear relationship
with the output request of the Scanning Platform due to the dynamics of the motor
controller. Any changes to the motor controller adjustment will require retuning
of the software.
The procedure to correctly set up the motor controller requires you to manually
adjust the motor controller and alter instance variables in the Scanning Platform
software using the ft utility.
1. At the Service Workstation, run the ft utility by typing ft at the $$ prompt. The
menu tree shown in Figure 5-1 on page 69 will help you find your way through
the menu selections.
2. In the ft main menu, select MODIFY Values, selection 1.
3. Select Manual Servo Calibration, selection 6, from the MODIFY Values menu.
The Manual Servo Calibration screen is shown in Figure 5-3.