two screws (1). Slide collar (7) into position and secure with
setscrew (1-. Attach vertical drive shaft (6) to universal joins
with tapered pin (10-.
(3) Insert horizontal drive shaft (22, fig. 6-11) (into
position on lensboard (23) and turn on horizontal adjustment
b. Calibrating. Calibrate the lensboard to the lens. Refer
handwheel (19). Position the two bearing blocks (2) and (20)
and secure each to lensboard with two screws (1). Slide collar
(21) into position and tighten setscrew (1). Attach horizontal
drive shaft (22) to universal joint (18) with tapered pin (10).
Section VII. LENSBOARD CARRIAGE ASSEMBLY
The lensboard carriage assembly (fig. 6-12) consists of two
vertical side frames of heavy ribbed casting bolted and pinned
to the carriage base plate. The carriage base plate is equipped
with side bearing block gibe and shims. It is securely mounted
with provisions to take up wear and to insure an accurate
sliding fit on the camera rail. The assembly is propelled along
the camera rail by the lensboard drivescrew. Four oil felt wipers
are installed on the carriage base plate to clear and lubricate
the rail in both directions of travel. Two travel limit switches are
mounted on the lens side.
6-26. Lensboard Carriage Disassembly
c. Remove two screws (15, fig. 6-11)
to release the oil felt
wiper (13) and wiper guard (14) from the carriage base plate
(17). Remove the remaining three wipers in the same manner.
d. Tap out two dowel pins (3, fig. 6-12) from under
carriage base plate (6). Remove two hex socket head screws
(2) and lockwashers (1) and lift off lensboard side frame (4).
Remove the remaining side frame (a) in the same manner.
e. Remove eight screws (9, fig. 6-13), securing carriage
base plate to four side bearing lock gibs (8). Remove four
screws (2), securing the drive bracket (5) to carriage base plate
f. Tap out tapered pins (4) from driven gear (7) and shaft
extension (6). Then remove extension and universal joint (3)
through top of carriage base plate (1). Tap out pin (4) to
disconnect extension and universal joint.
g. Remove carriage base plate from camera.
Figure 6-12. Lensboard carriage assembly, partially