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PVA Portal Manual Revision I / Janua ry 2022 Page 53 of 106 7. In the SetupTre e tab, adjust th e setpoint to match the v alue found. 8. Change the flow set point t o the valu e that was sho wn on the mode system message…

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PVA Portal Manual
Revision I / January 2022
4. Disconnect the material line from the inlet port of the flow monitor.
5. Turn the air inlet and the material outlet valves to the open position.
6. Use the material pressure regulator to slowly increase the material pressure until
material flows from the disconnected material line.
7. Turn the material outlet valve to the closed position.
8. Reduce the pressure for the pressure vessel and adjust the material pressure
regulator to 0 psi. Refer to the fluid system manual for more information.
9. Reconnect the material line to the inlet port of the flow monitor.
10. Perform the manual purge procedure to open the valves. Refer to Section 6.1 for
more information.
11. Turn the material outlet valve to the open position.
12. Use the material pressure regulator to slowly increase the material pressure to the
operating pressure.
13. Repeat the manual purge procedure for each valve until the material flows without
any breaks in the flow.
8.4.8.2 Finding the Correct Material Volume
A complete path program is needed before being able to find the correct material volume.
Any change to a program also changes the flow data results.
1. Load a completed path program into memory.
2. In Portal, select Manual mode.
3. Put the board in the correct position, as related to the board stops, and run one
cycle as “WET”. For more information on Manual mode, refer to Section 6.
4. After the cycle is completed, the dispensed volume is shown in the system
messages window.
5. Select the “Stop” button to go to Cycle Stop mode.
6. Select Setup mode and then the “Flow Monitor” tab.
PVA Portal Manual
Revision I / January 2022
7. In the SetupTree tab, adjust the setpoint to match the value found.
8. Change the flow set point to the value that was shown on the mode system
messages window. This will be a DMC command in the path program; adjust the
value of the variable to achieve this.
9. Select the “Stop” button to go to Cycle Stop mode.
10. Select Manual mode.
11. Operate the workcell for additional cycles to ensure that the path program
dispenses the same amount of material for each cycle.
8.4.8.3 Set the Material Volume Check
The settings for the material volume check must be programmed into the path program. If
no settings are programmed in the path, the machine will use the flow monitor settings of
the most recently run program. To set the material volume check parameters, program the
following settings into the path program using the two variables FCx_SET and FCx_DEV:
Note: If either of these variables are set to “0”, they will cause errors.
• “x” is the letter of the related flow monitor (A, B, C, or D).
• FCx_SET is the set point for the material flow in cc.
• FCx_DEV is the percent deviation permitted, which can range from 0 to 99.
For example, entering the following line into a path program would put the volume setting
for monitor ‘A’ at 0.5 cc and the allowable deviation at 5%:
• FCA_SET=0.500; FCA_DEV=5
8.4.8.4 Auto Cycle Flow Error
Auto Cycle checks the material flow after every cycle if the error is turned “ON” in Flow
Control mode. If the volume is within the set parameters, no indication is shown. When the
volume is outside the set parameters, the flow error screen is shown when the cycle
completes, not immediately on error. Before operating the workcell again, remove the part.
Note: Any changes made to settings in the material delivery system (material
pressure, stroke adjustment, etc.) will affect the data from the flow monitor. When
this happens, it will be necessary to find the correct material volume again.
PVA Portal Manual
Revision I / January 2022
8.4.8.5 Flow Monitor Calibration
The Flow Monitor on the workcell measures the amount of material that moves through
the material supply line before it splits to supply individual valves. It does not control the
process, but reports deviations from the set values. Both the necessary material volume
and the permitted deviation are determined by the operator. The flow monitor calibration
should be examined once a month or if changes are made to the fluid delivery system.
The following procedure is to calibrate a single flow monitor, if the specific gravity of the
dispensed material is known. This procedure would calibrate the A flow monitor, to
calibrate the B, C, and D monitors replace the variable DEZ, with DEW, DEE, and DEF as well
as FCA_CAL, with FCB_CAL, FCC_CAL, and FCD_CAL, respectively. Refer to Table 1 for
more information on the variables relating to each flow monitor.
1. Login to Portal.
2. Ensure the workcell is in Manual mode.
3. Select the Terminal tab on the right side of the Portal screen to open the terminal.
4. Type DEZ=0 (for first flow monitor only) in the top of the terminal screen and select
the “Enter” button on the keyboard. This resets the flow monitor encoder to zero.
5. Weigh an empty purge cup and record the weight or zero the scale with the empty
purge cup on it.
6. Purge a quantity of material into the purge cup.
7. Type DEZ=? into the terminal and select the “Enter” button on the keyboard. A
number will return (e.g., 50 counts per cc dispensed). The factory set value is 1000
count/cc. If zeros or incorrect data are returned, type MG_DEZ=?
8. Weigh the dispensed quantity of material in grams. If necessary, subtract the weight
of the cup from this value.
9. To find the material volume in cc, use the equation below:
Grams of material/specific gravity = cc
e.g.: 0.500 g/0.96 = 0.5208 cc
10. Use this value (in cc) to find the correct number of counts per cc dispensed.
Counts/cc = counts per cc
e.g.: 25 counts/0.5208 cc = 48.003 counts per cc