Manual

Page 34 of 64 General Machine Products Co., Inc.
TO SET PRESSURE SWITCH SMALL DIAMETER (UNDER 12MM) OR FLEXIBLE CABLE
Clamp a piece of 1” O.D. dowel/round bar x 13” long between top and bottom housings so it
butts up to the air chamber mounted collets (in effect placing the motors in stall mode).
1. Connect the electric lead to the power pack and blowing machine.
2. Rotate the speed control knob fully counter-clockwise to “MIN”.
3. Press the on/off button (to turn the electric’s on).
4. Turn the pressure switch adjusting screw fully in (clockwise) using either a 3/32 inch or
1/8” Allen key through the hole in the side of the panel (see fig. 2).
5. Start the power pack.
6. Turn the hydraulic on/off valve to “on” position.
7. Turn the speed control knob towards “max” (clockwise) until the pressure gauge reads 870
psi (60 Bar).
8. Turn the pressure switch adjusting screw slowly out until the power pack stops.
9. Turn the speed control knob to minimum (turned fully counter-clockwise).
10. After 5 seconds has elapsed restart the power pack and turn the speed control knob
slowly towards ”MAX” and note what pressure the power pack stops, repeat the procedure
and fine adjust the pressure switch adjusting screw until 870 psi (60 Bar) is achieved.
Fig 2
When installation of cables of diameters 12mm O.D. and above are required again, re-
set the pressure relief valve and pressure switch to:
Pressure relief valve 110 Bar
Pressure switch 100 Bar
Speed Control