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

12.0 Adjustments
This switch senses when the clamp is in the up position and prevents backgauge movement
if the clamp is not up. It also diverts the air from the table when the clamp is down to prevent
the stock from moving during a cut. This switch is actuated by a actuator on the top of the
clamp. The switch must be adjusted to within 1/8" (3.2mm) of the actuator. The actuator
must be adjusted such that the switch shuts off soon after the clamp starts downward travel.

12.9 Clamp Return Speed Adjustment

The clamp return speed 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 upper flow control valve on the air cylinder
(Figure 38) and turn the adjustment knob clockwise to decrease the return speed of the clamp or
counter-clockwise to increase the return speed of the clamp. The clamp should be adjusted such that
it returns fast but does not bounce at the top of the stroke. Tighten the locking nut when finished.

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
39).
46
Actuator
Figure 37
Figure 38
Clamp Up
Proximity
Switch
Upper Flow
Control Valve