Flesher: Technical Support

System 3 Service Bulletin 008:

Setting Auxillary Sensors on the System 3

FOIL SENSORS

Foil sensors on the System 3 machine are designed to detect broken or out of foil condition and stop the machine from beginning to stamp a new piece of cloth or from releasing the piece of cloth just stamped (depending on when the fault condition is detected). The sensitivity of these sensors must be adjusted to detect infrared light reflected from the back of the foil. These adjustments are the top three adjustment potentiometers on the lower right hand corner of the I/O board in the area labeled AUXILLIARY SENSORS. The potentiometers are labeled R24, R22, and R15. These sensor adjustments should be set with no foil in place.

First remove the foil from in front of the sensors and turn the sensor adjustments fully counter clockwise. Adjust the sensors clockwise until the respective LED indicator turns off. Then turn the adjustment counter clockwise slowly until the LED indicator just turns on. This is the most sensitive point of adjustment and should be left there.

CLOTH SENSORS

Cloth sensors on the System 3 machine are designed to detect a mis-feed of the cloth feeder. The sensitivity of these sensors must be adjusted to detect infrared light reflected from the back of the cloth. The adjustment is critical since very little light is reflected from the back of a piece of black cloth. The sensors must be able to discriminate between the light reflected from the back of cloth and ambient light entering from overhead lights or outside sunlight.

The cloth sensor adjustments are the fourth and fifth potentiometers (counting down from the top) on the lower right hand corner of the I/O board in the area labeled AUXILLIARY SENSORS. The potentiometers are labeled R14, and R6. These sensor adjustments should be set with no cloth covering the sensors and with normal ambient light conditions.

First make sure there is no cloth covering the sensors and turn the sensor adjustments fully counter clockwise. Adjust the sensors clockwise until the respective LED indicator turns off. Then turn the adjustment counter clockwise slowly until the LED indicator just turns on. This is the most sensitive point of adjustment and should be left there.

If the sensors fail to detect an actual mis-feed condition or if they detect a mis-feed condition when there isn't one, there may have be too much ambient light when the sensitivity adjustment was made. If the machine is in bright sunlight or high lighting from incandescent lamps difficulty may be experienced in obtaining satisfactory adjustment. Shading these sensors from the source of ambient light may be necessary.