Fig. 4-54 Adjustment Of Cleaner Blade Pressure (A) - Canon NP-70 Service Manual

NP-70
4-47
a)
Remove the skirt blade and holder by unscrewing the skirt blade knobs:
b) Release the cleaner blade pressure by pulling out the locking arm knob and, then, raising
the arm. Place the pressure receiving sheets (the two sheets of stainless foil especially pre-
pared for measuring the blade pressure) between the cleaner blade and the drum.
c)
Lock the cleaner blade by repositioning the locking arm knob, making sure the sheets re-
main in position between the drum &blade.
d) Hook the spring balance to the pressure measuring sheet in the middle and draw it out in
the plane tangent to the blade-drum contact point. Do this slowly and with uniform speed,
measuring the value on the balance while the inside sheet is sliding (see Fig. 4-54).
e)
Measure three points (front, center, and back) of cleaner blade contact, repeating steps
b) ~ d).
Pressure Adjust-
ment Plate
Spring
Balance
Pressure
Receiving
Sheets
Locking Arm Knob
Fig. 4-54 Adjustment of Cleaner Blade Pressure
(AJ
Cleaner Blade
The pressure of the cleaner blade should be within the range of 150 ~ 190 g/cm2
f) When the pressure is out of the specified range, first attempt to adjust it by tightening/
loosening the adjustment screws (see Fig. 4-55) for the cleaner blade.
Adjustment Screw
Adjustment Screw
4i ~i
■
Support Bracket
Fig. 4-SS Adjustment of Cleaner Blade Pressure
(BJ
© CANON INC.
Second PrintingJune, 1974
p'
Blade Knob