Unitek MICROPULL IV MP4/115, Operation And Maintenance Manual

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CHAPTER 3: OPERATING INSTRUCTIONS
MICROPULL
®
IV WIRE BOND PULL TESTER
3-4 990-180
2 Use the screwdriver end of the hook insertion tool and slowly turn the zero adjust potentiometer on the
Beam Module, figure 3-4, clockwise until the minus sign in front of the PEAK FORCE reading lights.
Then, turn the zero adjust counterclockwise until the minus sign just goes out.
Beam Travel Adjust
CAUTION:
Move the device holder so that it is not under the hook before adjusting the beam travel to
eliminate the possibility of bending the hook.
1 Push The Control Lever down. The beam arm is now in its lowest position. The relative position of the
hook can be changed by using the five sets of mounting holes in the beam
2 Raise the Control Lever. The hook should move 1/4-inch vertically.
3 Actuate the footswitch, if necessary. Return the Control Lever to its lowest position.
4 With the BEAM TRAVEL control at MIN turning the DOWNSTOP control to UP should raise the hook
position by about 1/4 inch.
Figure 3-4. Beam Assembly Adjustments
Tape cable
connector
Beam amplifier
PCB (A1)
Beam
Test staus
indicator (red)
Hook access
cover
Beam calibration
potentiometer (R1)
Beam support
Zero adjust
potentiometer (R6)
Damping screw