Adj 4.16 Book Underside Air Lift - Challenge CMT-130TC Service Manual

ADJ 4.16 Book Underside Air Lift

The book underside air lift uses a blast of air to
reduce scratching on the bottom cover as the
books moves through the machine. The amount
of lift may require adjustment depending on the
thickness of books being trimmed.
Initial Actions
Check that the air supply is switched on.
Procedure
1. Switch the main power ON.
2. Go to the diagnostic screen and enable out-
puts (GP 6.2 Input/Output Diagnostics).
3. Switch on the "Book Underside Air" output.
This will manually actuate the air valve 7B
and start the underside air blast.
4. Locate the book underside air lift adjustment
knob at the front of the machine (Figure
4-33).
5. Locate the red locking ring and unlock it by
pulling it toward you (away from the ma-
chine).
6. To increase the amount of lift, such as for
thicker books, adjust the valve counter-
clockwise. To decrease the amount of lift,
such as for thinner books, adjust the valve
clockwise. It may be helpful to place a book
on top of the lower gripper block.
7. When finished adjusting, push the locking
ring back in to lock it in place
8. Switch the main power OFF to exit the diag-
nostic screen.
CMT-130TC Book Trimmer
Figure 4-33. Underside Air Lift Adjustment
MAY 2019
4-21 4. Repair/Adjustment Procedures