Manual

4-4 Configuration and Characterization
4.5 Characterization
" NOTE A characterization must be performed for each tool and each coating material used or as
required to ensure quality and consistent dispensing.
Many variables, such as material type, temperature, viscosity, substrate type, robot velocities, and
dispenser response times affect the coating process. Characterization improves coating placement
accuracy and repeatability. The Characterization Wizard helps you adjust program values to compensate
for these variables. The characterization process consists of defining the following values:
• On/Off Response Times • Dispense Speed (Velocity)
• Dispense Height • Dispense Width
"NOTE All of these variables are interrelated. Make your selections based on the results you want
to achieve. Refer to ECNT online help or contact your Asymtek representative for
additional information.
The characterization automatically calculates dispensing ON and OFF times. Characterization
compensates for such variables as:
• Change in air pressure
• Fluid viscosity
• Fluid Dispensing Applicator velocity
When you perform a characterization, the Fluid Dispensing Applicator will dispense three stripes of
material. You will then be prompted to select the best pass (generally the third line). The values will be
stored in the Robot Controller. The Fluid Dispensing Applicator will then dispense three additional stripes
of material. These lines should correspond to the best pass previously selected. This is your
characterization.
To perform a characterization:
1. From the Operator Screen, click on
Configure Tool > Toolname.
! The Conformal Coating Characterization Wizard dialog box shown in Figure 4-3 opens:
Figure 4-3 ECNT Characterization Wizard Dialog Box