Field Change Order #510F26226 - Optic Paper/Metal Detector

Gabi Ra’anan
February 21, 2000

Reason for Change

Improve reliability and prevent denting on the plate

Description of Change

Replace existing detector with new one

Change Procedure

• Exit the application before starting.
• Open the front and right doors.
• Open the X-Y bar top cover.
• Remove the old paper/ metal detector.
• Connect the optic sensor above the same slot (the screws insert to different holes now). Use the screws supplied with the kit.
• Connect the cable labeled “Bar Flag 2” to the 3 pins connector on the converter board.
• Connect the 2 pins Molex connector to the cable labeled “paper/metal” (coming from the harness on the right).
• Connect the 4 pins Molex connector to the converter board.
• Place the board as shown in the following picture. Under the board you should find a double-sided tape for attaching the board in that place. Make sure to route all wires properly without touching the Bar Flag before you finally stick the board in place. Do not cover holes for suckers on the X-Y bar.

Test Procedure

Note: Avoid direct light on the plate or paper during the adjustment

There are two LED’s on the sensor, green and red, to indicate the reading of the sensor.

• The “Sens” screw is for sensitivity adjustments.

• The “Mode” should be in L position ( “Light On” ).

1. Open the top cover of the cassette. The front door should be open as well.

2. Open “Paper/Metal detector” dialog box in the GUI.

3. Bring the X-Y bar down manually so the suckers touch a plate. Apply enough force to fully load the suckers springs.
4. Adjust the sensitivity of the sensor as follows:

• Optic sensor status should be “ON” when it detects a plate. The red led and the green led should lighten up.
• Optic sensor status should be “OFF” when it detects a paper .The green led should be ON and the red led should be OFF. Repeat step 3 with paper to check this.

• Note: If you find that the reading is “OFF” for a plate and “ON” for a paper, flip the “Sens” screw 180 degrees. Ensure that there is no interference in the beam way from detector to plate.

5. Ensure that the sensor indications are correct when the suction cups are 20-30 mm above a plate or a paper.

Fine Adjustment

The optic sensor status depends on the amount of light reflected. It should detect a paper (“OFF”) even when the distance from the sensor to the paper is shorter. Place a peace of folded paper about 10 mm high beneath the sensor when the suction cups are pressed down. If the reading is “ON”, gently rotate the “Sens” screw until the status changes to “OFF”. (This fine adjustment will ensure paper detection when the paper is not flat on the plate).

Parts List

Attached Documentation

 N/A

Material Disposition

You can dispose off the old detector.

Logistics

DU’s should order the following quantities

• STA – 60, STE – 60, STAP – 10, STN – 10, STMA - 10