Emerson 20/20 service manual Photochopper

Section 14 • Slide Calibration

4.From the main screen select the Menu button.

5.On the menu screen select the Slide Calibration but- ton. When the “Slide Valve Calibration” screen appears, then you can safely connect the Power Cable (Yellow TURCK cable) and the Position Transmitter Cable (Gray TURCK cable) to the Capacity motor. Press “+” or “-” to move the slide valves to check the rotation. (See Table 1 below for proper shaft rotation). If for any reason the “+” or “-” command on the panel does not correspond to the slide increase or decrease, swap the blue & brown wires of the Yellow TURCK cable in the control panel to reverse the rotation of the motor.

CAUTION

DO NOT CONTINUE TO ENERGIZE THE ACTUATOR MOTOR AFTER THE SLIDE HAS REACHED THE MECHANICAL STOP. Doing so may cause mechanical damage to the motor or shear the motor shaft key. When the slide has reached the mechanical stop position, press the button in the center of the photochopper to release the brake, and thereby

release the tension on the actuator motor.

6.Quickly press and release the BLUE CALIBRATION BUTTON on the ACTUATOR motor once. This instructs the ACTUATOR motor to enter the calibration mode. The red LED on the actuator control board will begin flash- ing. Use the “-” button on the Vission 20/20 panel to drive the capacity slide to its minimum mechanical stop position.

This will be apparent by a slowing of the motor rotation and a winding sound from the actuator motor. When you hear the motor wind-up, release the “-” button.

Then use the “+” button to pulse the motor so that the capacity slide is “just off” of its minimum position and there is no tension on the motor shaft.

7.Quickly press and release the BLUE CALIBRATION BUTTON on the ACTUATOR motor once. The red LED will now flash at a slower rate. This now instructs the ACTUATOR motor that this point is the minimum slide position. This point will correspond to 0 volts AFTER the ACTUATOR calibration procedure is completed.

8.Use the “+” button on the Vission 20/20 to drive the capacity slide to its maximum mechanical stop position. This will be apparent by a slowing of the motor rotation and a winding sound from the actuator motor. When you hear the motor wind-up, release the “+” button.

9.Quickly press and release the BLUE CALIBRATION BUTTON on the ACTUATOR motor once. The RED LED will stop flashing. This now instructs the ACTUATOR mo- tor that this point is the maximum slide position. This point corresponds to 5 volts. The ACTUATOR calibration procedure is completed.

Now the Capacity Channel is automatically calibrated based on the calibration settings made to the actuator.

Figure 14-2. Photochopper

CAUTION

Do not over tigten screws. Failure to comply may

result in damage to equipment.

.

10.Gently lower the plastic cover to where it contacts the base and O-ring seal. After making sure that the cover is not binding, gently tighten the four # 10 Phillips screws.

11.Repeat the same procedure for the Volume slide motor.

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 14 – 3