SL940-Install-Ops-Maintenance-7210918_B.pdf - 第127页

Configuration a nd C haract erization 6- 19 To perform a charac terization:  NOTE Make sur e you hav e selec ted the p roper tool as the poi nter in the E dit Sc reen ( Fi gur e 6-16 ). T his is the too l that will be u…

6-18 Configuration and Characterization

2. Move the robot until the tool tip is above all components on the boards you are coating, and

any other component in the workcell with which the tool tip could collide.

3. Select the

Safe Z Height value field.

 When you click on the Safe Z Height value field, the

Teach Field button appears.

4. Click on the

Teach Field button.

 The value entered is the current Z coordinate of the tool tip, and should be negative.

 If you wish to edit this value manually, select the property field and enter a new value.

5. Enter the desired Z-Speed.

6. Click on

OK.

6.13 Bar Code/DataMatrix Scanner Configuration

If your system is equipped with the optional Bar Code/DataMatrix Scanner, you will need to perform a

Scanner configuration. For additional information, refer to the appropriate Scanner User Manual or

contact your Asymtek representative.

6.14 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

• Coating Height

• Coating Speed (Velocity)

• Coating Width

NOTE All of these variables are interrelated. Make your selections based on the results you want

to achieve. Refer to the ECXP User Guide or 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

• Coating applicator velocity

When you perform a characterization, the coating applicator will dispense three stripes of material. You

will then be prompted to select the best pass for both the start and end values. The values will be stored in

the robot controller. The coating applicator will then dispense three additional stripes of material. These

lines should correspond to the best pass previously selected. This is your characterization.

Configuration and Characterization 6-19

To perform a characterization:

 NOTE Make sure you have selected the proper tool as the pointer in the Edit Screen

(Figure 6-16). This is the tool that will be used to teach the positions. If the

system is configured with a Genie Camera or a Laser Pointer and you are going

to use one of these to teach positions, make sure it is selected.

Figure 6-16 Selected Pointer

1. From the Edit screen, click on Configure > Tools.

2. Select the tab for the tool to be configured and then click the

Configure button

(Figure 6-1).

 The tabs will vary depending on system configuration.

Figure 6-17 ECXP Tool Configuration

 The Conformal Coating Characterization Wizard dialog box shown in Figure 6-18 opens:

6-20 Configuration and Characterization

Figure 6-18 ECXP Characterization Wizard Dialog Box

3. Click Clear Positions and then click OK to confirm.

 If you have performed a characterization before, the old test area coordinates are used

unless you clear them.

4. Click

Next.

5. Click

Yes when prompted to teach the substrate height.

6. Teach the substrate height.

a. Place a characterization sheet (Figure 6-19) in the workcell.

b. Lower the tool tip to the substrate and click

Teach Z

c. Click

7. Enter the dispense height.

 The following variables should be considered:

- Height of tallest component to be coated

- Width of coating stripe

- Coating material flow rate and viscosity

- Coating stripe overlap

8. Enter the desired rotate position and click

Next (for applicators equipped with rotate and

cross-cut nozzles).

9. Enter the desired dispense speed and click

Next.