Carriage Actuator Arms Adjustment; Main Drive Belt Adjustment - Centronics 704 Technical Manual

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302.3 CARRIAGE ACTUATOR ARMS ADJUSTMENT (Figure 5-3)
A.
Be
C.
De
Ee
Bend .ready to print (RTP) switch actuator arm parallel to and
59 mm (2.3 in.) from center of upper guide bar. ©
Bend end of print (EOP) switch actuator arm parallel to and 55 mm
(2.1 in.) from center of upper guide bar.
After actuator arms have been adjusted, slowly move carriage
assembly from left to right insuring arms do not contact the RTP
and EOP optics switches.
If actuator arm should contact switch, loosen two optical switch
mounting screws and position switch so that actuator arm is
centered in slot of switch.
Tighten optical switch mounting screws, if necessary.
00444
CARRIAGE
Figure 5-3. CARRIAGE ACTUATOR ARMS ADJUSTMENT
52.4 MAIN DRIVE BELT ADJUSTMENT (Figure 5-4)
A.
With the carriage assembly in the left most position, adjust belt
tension by turning clockwise (tighten) or counterclockwise
(loosen) two adjusting screws on idle pulley assembly so that
deflection at center of belt is 8 to 9 mm (9/16 in.) when a 300
gram (11 0z.) load is applied at the center of the belt.
NOTE: IT IS BEST TO USE A WIDE LOAD DISTRIBUTED 64 MM TO 74 MM
(2-1/2 ine TO 3 in.) OVER THE BELT.
5-3