User guide

Needle Heater 12-1
12 Needle Heater
Overview
The Needle Heater consists of a needle-heating element, selected for compatibility with your valve or
fluid pump (Table 12-1), and a factory-installed 4- or 8-channel Temperature Controller.
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NOTE For many epoxies and adhesives, a higher fluid temperature can decrease “stringing”
during dispensing, thus increasing dispensing accuracy.
Theory of Operation
Depending on the type of heating element used, the Needle Heater attaches to the needle or to the Luer
Lock fitting, and is plugged into an outlet on the Dispensing Head. Needle Heater temperature is
controlled through the Fluidmove for Windows NT (FmNT) software.
Your Asymtek service technician installs the Needle Heater as part of the dispensing system installation
or during an upgrade. This section describes the function and operation of the Needle Heater.
Table 12-1 Heating Element Compatibility Guide
Heating Element Valve Compatibility
HT-04 Asymtek DV-04 valve only
HT-06 All Asymtek valves except DV-04
HT-10N All Asymtek valves using metal needles
WARNING! CAUTION!
The Needle Heater elements should be installed by Asymtek-trained
personnel. If the dispensing system needs to be moved, the Needle Heater
should be disconnected. Refer all major adjustments to an Asymtek service
technician and see the service manual for the C-721 dispensing system for
further assistance.
Operation
Major components of the HT-04 heating element are shown on in Figure 12-1. Figure 12-2 shows an HT-
06, and Figure 12-3 shows an HT-10. The 4- and 8-channel Temperature Controller is shown in Figure
12-4.