Portal_Manual_1.2.1_Rev_H-1.pdf - 第39页
Portal PVA Revisio n H ( 2018 ) 39 of 93 8.3.2 Find the Correct Material Volume You must have a complete path pro gram b efore you find the correct mate rial volume . Any change to a pro gr am changes the flow data resul…
Portal
PVA
Revision H (2018)
38 of 93
8.3 Flow Monitor (Optional)
The Flow monitor will always be in setup tree with only on/off settings. Setpoint and
deviation MUST be set in path programs.
Some workcells have flow monitors (up to four) installed. Workcell flow monitors
measure the amount of material that flows through the supply line before it goes to
supply individual valves. They are used to show when the actual values are outside of
the set values. The operator sets the necessary material volume and permitted
deviation.
8.3.1 Priming the Flow Monitor
The flow monitor must be primed before it is used to prevent damage. When you prime
the flow monitor, the amount of air that goes through the unit during initial startup is
reduced. Do the procedure below to prime the flow monitor.
1. Fill the pressure vessel with material and close tightly, refer to the system
manual.
2. Set the material pressure regulator to 0 psi.
3. Turn the air inlet and material outlet valves to the closed position.
4. Disconnect the material line from the inlet port of the flow monitor.
5. Turn the air inlet and 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.
9. Connect the material line to the inlet port of the flow monitor again.
10. Do the manual purge procedure outlined in the operations and maintenance
manual to open the valves, refer to Section 6.1.
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. Continue the manual purge procedure for each valve until material flows
without any breaks in the flow.
Portal
PVA
Revision H (2018)
39 of 93
8.3.2 Find the Correct Material Volume
You must have a complete path program before you find the correct material volume.
Any change to a program changes the flow data results.
1. Load a completed 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 the Manual mode, refer to Section 6.
4. After the cycle is done, the dispensed volume is shown in the system messages
window.
5. Select “Stop” to go to Cycle Stop.
6. Select “Setup” mode.
7. Select the “Flow Monitor” tab in Setup mode (In the setup tree 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 your path program, adjust
the value of the variable to achieve this.
9. Select “Stop” to go to Cycle Stop.
10. Select “Manual” mode.
11. Operate the workcell for more cycles to make sure the path program dispenses
the same amount of material each cycle.
8.3.3 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 program run before it. To set the material volume check parameters,
program these settings into the path program.
• Two variables are used: FC_SETx and FC_DEVx; if you set these to “0” it will
cause errors.
• And “x” is the letter of the related flow monitor (A, B, C, or D).
• FC_SETx is the set point for the material flow in cc.
• FC_DEVx is the percent deviation allowed, which can be anywhere from 0 to 99.
As an example, entering the following line into a path program: FCA_SET=0.500;
FCA_DEV=5 would put the volume setting for monitor ‘A’ at 0.5 cc and the allowable
deviation at 5%.
Portal
PVA
Revision H (2018)
40 of 93
8.3.4 Auto Cycle Flow Error
Auto Cycle checks the material flow after every cycle if the error is turned “ON” in the
Flow Control mode. If the volume is within parameters, no indication is shown. When
the volume is outside the parameters, the flow error screen is shown when the cycle
completes (not immediately on error).
Remove the part before operating the workcell again.
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.
8.3.5 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 any changes are made to the fluid
delivery system.
This 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
respectively, as well as FCA_CAL, with FCB_CAL, FCC_CAL, and FCD_CAL. See the Chart
at the bottom of the page for the variables relating to each monitor.
1. Login to Portal.
2. Make sure the workcell is in Manual Mode.
3. Select the Terminal tab on the right side of the Portal screen to open the
terminal screen.
4. Type DEZ=0 (for first flow monitor only) in the top section 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 key board. A
number will return (ex. 50 counts per cc dispensed). The factory set value is
1000cnt/cc. If zeros are returned or incorrect data, type MG_DEZ=?