User guide

15-4 Heaters
Theory of Operation
Both contact and impingement heaters work in accordance with the same theory of operation, giving the
highest degree of thermal control during all phases of the dispensing process. Each type of heater is
controlled by the FmNT dispensing software.
In this theory of operation, all configurations are considered and included. However, your specific system
operation with respect to underboard heaters and options may vary depending upon system configuration.
Operation
Heaters can be arranged in any of the three zones along the length of the dispensing area:
• Pre-Heat Zone
• Dispense Heat Zone
• Post-Heat Zone
The temperature parameters for each zone are set up within FmNT, which communicates with the
Temperature Controller to regulate heater operation.
Contact Heaters
Contact heater operation on C-721 Series dispensing systems requires communication between FmNT,
the Temperature Controller Module, the Pneumatics Module and the heaters as described below and in
Steps A through D in Figure 15-3. Operation of the contact heater vacuums requires communication
between FmNT, the Conveyor Controller Module, the Conveyor Pneumatics, the Vacuum Controller and
the heater vacuum as described below and in Steps E through H of Figure 15-3.
For the heaters:
A. Temperature parameters are set in FmNT.
B. FmNT sends the temperature information to the controller on the Temperature Controller
Module.
C. The Temperature Controller Module sends the information directly to the heaters.
D. The Temperature Controller Module monitors the temperature and reports the information back
to FmNT.
For the vacuums:
E. FmNT sends information to the Conveyor Controller Module.
F. The Conveyor Controller Module sends the information to the Conveyor Pneumatics Module.
G. The Conveyor Pneumatics Module sends the information to the Vacuum Controller.
H. The Vacuum Controller activates the heater vacuum.