Knife Latch Adjustment - Challenge CHAMPION 305 Instructions And Parts Manual

4. If the backgauge position readout is off, you will have to adjust the accuracy. This parameter
provides a means for adjusting the accuracy of the backgauge. To change the accuracy,
move the backgauge to 2 inches (50.8mm) and cut paper. Measure the paper, and type in
what you actually measure. The computer will calculate the amount of error and will
compensate. The amount of error could also be added to or subtracted from the value
already displayed. Press "A" for Maint., then select Parameters, then select Accuracy Adjust,
then enter the measured value.
5. Send the backgauge back several inches, then bring it forward through the 5" (127mm) pre-
setter again and make another test.

12.5 Knife Latch Adjustment

The knife latch prevents the knife edge from drifting down while the machine is not in operation. The
knife latch height must be set properly in order for the machine to function properly and to prevent the
knife blade edge from becoming exposed.
blade edge being exposed at times other than normal operation. Serious injury could result.
Follow these instructions to adjust:
1. Make sure the knife is all the way up and has not drifted down by performing a cut cycle.
2. Turn the machine off and lock out power, see page 6.
3. Loosen the two screws on top of the control console and tilt down the console. Locate the
knife latch assembly inside the machine.
4. Check the gap as shown in Figure 34. The gap should be .030" (.8 mm) to .060" (1.5 mm).
5. If the gap is out of range, adjust the knife latch height by loosening the mounting screws
(Figure 34) and move the knife latch assembly up or down until the gap is in the correct range
of .030" (.8 mm) to .060" (1.5 mm).
6. Tighten the mounting screws.
Failure to adjust the knife latch properly could result in the knife
Knife Latch
Gap
Figure 34 – Knife Latch
Mounting Screws
Adjust-
ment
12.0 Adjustments
45