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PVA JDX - Set Fluid Pressure; Set the Heater Temperature

PVA JDX
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JDX
PVA
Revision H (2016)
13 of 39
Set the Heater Temperature 3.4
The temperature can be adjusted to improve dispense quality. The fluid will dispense
with a cleaner break and better flow when the heat is set correctly. The viscosity and
rheology of the material have an effect on the necessary dispense temperature.
Generally the higher the viscosity the more heat you will need.
1. Turn on heater and wait 5-10 minutes for the temperature to stabilize.
2. Examine the table shown below to find a good temperature to start with.
Table 1: Fluid Viscosity And Dispense Temperatures
Fluid Type
Viscosity cps
Temperature °C
Hysol 3800
300
35
EMI3553
1K
40
EMI 1748S-HTG-HV3
400K
45
Loctite 3621
50K
45
EMI 1768-VTG
65K
45
Alpha WS-619
100K
50
Norland 123 TKHGA
200K
50
Namics 8439
50K
55
Namics 8410
60K
55
3. Use trial and error to find the best temperature setting for your material. Fluid
viscosity does not directly relate to the necessary temperature.
WARNING: If the temperature is set too high the material will cure in the
nozzle plate.
Set Fluid Pressure 3.5
The fluid pressure supplies the material to the jet chamber to keep the drop size correct
and consistent. Higher fluid pressure is usually better.
1. Set the jet to open with the operator interface or JDX controller box.
2. Start at 10 psi and increase the fluid pressure until a steady stream or a
continuous flow of dots exit the nozzle. Fluids react differently, some may curl
up or pool at the nozzle outlet.
Refer to Section 10 for more information.

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