(3) During operation, adjust the speed and thermostat controls (c
below).
c. Adjusting speed and thermostat control (figure 313)
Exact operating conditions will vary with air temperature, relative
humidity, paper weight, line voltage, and amount of water on the print when
placed on the apron. If the drum is too hot, warping and poor glossing of
the prints will result. If the drum is too cool, the prints will not be
dry, and glossy prints will stick i n s t e a d of dropping into the print
tray. Generally, the thermostat control setting will be correct and the
apron speed must be adjusted until the prints are dry enough to fall off the
drum into the print tray. Below is a table showing the approximate
operating control settings.
Control
Setting
Thermostat:
200
Idling and partial load................
220
Maximum load...........................
Speed:
Singleweight, glossy..................
16 in./min
Singleweight, matte...................
18 in./min
Doubleweight, glossy..................
8 in./min
Doubleweight, matte...................
9 in./min
EXERCISE
20. When drying print and you have to change from one type to another, you
must first change the position of the _______________ _______________.
(fill in blanks)
260
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