User manual

ACME Electronic Machinery Co., Ltd. ACME
2012/6/20
4
1、Design principle
ACME electronic measuring machines are operated by photo electronic circuitry. A
small incandescent light bulb and a phototransistor are aligned face to face in a vertical
configuration to create a basic sensor unit. These sensor units are then made
horizontally in line at one-inch interval. Eight of these sensor units and a CD-4021 shift
register installed in one circuit board become a segment of the bridge.
When the leather passes through these sensor bridges, the leather blocked out the light
emitted from the incandescent light bulbs. Thus, the terminal voltage of each light－
obstructed phototransistor rises. Then the number of sensor is blocked represent the
width of the leather. In the way, leather carry through the sensors by conveyers. The
movement generated the length signal. The photo sensors incorporate with parallel
input and serial output register. The CD4021 will function as following：
Once the conveyer signal occurring, the conveyer signal extrudes the ball inside the slot
out for count. As the end of the leather pass over the sensor, the conveyer signal will
extrude no ball for count. The change state from having a ball to none of ball in the
extrusion will initial a command for display the total amount of ball, and print out, etc.
2、Control and switches
1) Machine Body
1.Power switch: For master control of power.
2.Motor switch: For moving and stopping of conveyers.
3.Light switch: Control the on/off of the incandescent light bulbs.
Note: Machine will not work if this switch was turned off.
4.Cancel button: Push this button before the hide completely passes through the sensor
bridges will cancel this particular measurement.