User guide

4-4 Operation
Heat Station Timers
If your system is equipped with part heaters, it will also have Heat Station Timers for the pre-dispense
and post-dispense zones. The timers are located on the Temperature Controller, which is in the front
lower cabinet, next to the computer (Figure 2-3). Timer controls are on the Temperature Controller.
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NOTE Heat station timers for the pre- and post-dispense (left and right) heaters are located on
the face of the 4- or 8-channel temperature controller in the lower cabinet. Dispense
timers are controlled through FmNT programs as “wait” functions. See the Fluidmove
for Windows NT User Guide for details.
During a production run, each Heat Station Timer controls the minimum time (in seconds) that a part will
remain in its current zone. To change this minimum duration, press the
Select button on the
corresponding timer.
As a part moves from zone to zone, the heat station timer is delayed if the downstream process is not yet
completed. Dispense zone activity delays the pre-dispense zone timer. Similarly, uncompleted dispensing
activity, post-dispensing activity, and downstream machine availability will delay the dispense zone
timer.
As a result, if the pre-dispense zone timer expires while a part is waiting in the dispense zone, the part in
the pre-dispense zone will not move forward until the dispense zone is clear. Likewise, if the post-
dispense timer expires before dispensing is complete or before the downstream machine is ready to
accept the next part, the part in the dispense zone will not move forward until dispensing is complete or
the downstream machine is ready to accept the next part.
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NOTE Heat Station Timers are adjusted during installation and should be modified only by an
experienced process engineer.
Quick Refill
If your particular dispensing system is equipped with a DP-Series dispensing pump, it can utilize the
Quick-Refill feature. Quick Refill lets you specify a refill speed that is different from the pump
dispensing speed (see Valve Reverse Speed Potentiometer, Table 4-5). Specifying a separate refill speed
can greatly increase throughput by having the pump refill at a faster speed than it dispenses.
Single-Lane Conveyor
Each Century C-721 dispensing system is equipped with a single-lane conveyor as a standard feature.
The conveyor can be configured with either contact or impingement heaters. See the Conveyors section
for more details.
Consumables
The following items represent operational support material for the C-721 system. They are considered
consumables and are to be discarded after use.
• Isopropyl alcohol (IPA)
• Plastic cup PN: 58-0030
• Dry, soft, lint-free rag
• Small bottle brush
• Various types of syringes
• Latex gloves
• Conveyor o-ring belt PN: 01-0306-00