Pre-Clamp Pressure Adjustment; Pre-Clamp Speed Adjustment - Challenge CHAMPION 305 Instructions And Parts Manual

12.10 Pre-Clamp Pressure Adjustment

The pre-clamp feature of the Champion 305 uses low-pressure pneumatics to bring the clamp down
prior to making a cut. The system pressure is set at the factory and allows for safe and proper
operation of the clamp. It should not be necessary to adjust unless the clamp does not come down
all the way to the table after pressing the foot pedal. If this is the case follow these instructions to
adjust:
1. Open the lower left front door and locate the pneumatic pressure adjustment knob (Figure
42).
2. Loosen jam nut.
3. Increase the pressure by turning the valve clockwise until the clamp is able to travel down to
the table completely when pressing the foot pedal switch.
4. Check to make sure the force under the clamp does not exceed 66 lbs (30 kg). A scale, such
as a bathroom scale, should be used to measure this. If the force exceeds 66 lbs (30 kg),
decrease the pressure by turning the valve clockwise until the force is below 66 lbs (30 kg).
5. Tighten the jam nut on the pressure control valve.
6. Close and lock lower left door.

12.11 Pre-Clamp Speed Adjustment

The clamp down speed (when pre-clamping using the foot pedal) can be adjusted if it becomes too
sluggish or too fast. This adjustment is made on the air cylinder that is attached to the clamp. To
make this adjustment, first remove the upper rear cover. Then loosen the locking nut on the lower
flow control valve on the air cylinder (Figure 43) and turn the adjustment knob clockwise to decrease
the down speed of the clamp or counter-clockwise to increase the down speed of the clamp. Tighten
the locking nut when finished.
Adjustment
Knob
Figure 42
12.0 Adjustments
Jam Nut
51