PCP-Manual-REV-C.pdf - 第13页

PCP Series Manual Revision B / October 2021 Page 13 of 56 Pump Shutdown Proce dure 1. Remove the needle from the manifold. 2. Purge material through the manifold. 3. Completely clean the manifold material outlet. 4. Inst…

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PCP Series Manual
Revision B / October 2021
Fluid Pressure
The resistance of flow through the dispense needle have an effect on the outlet fluid
pressure. The size of the static mixer and dispense needle, the viscosities of the fluids, and
the flow rate also all have an effect on the outlet fluid pressure.
• The maximum outlet fluid pressure is 285 psi.
Material Flow Rate
Material flow rate can be adjusted in Auto Cycle or Manual mode through PVA Portal. Refer
to the Portal instructions in your workcell manual. An alternative is to adjust the path
speed in PathMaster instead of material flow rate. Refer to your PathMaster manual.
Install the Needle
After the system has been bled, you must install the needle.
1. Push the needle up and twist to attach it.
2. Use the purge function to release all air from the needle.
Snuff Back
The “snuff back” function prevents strings or drips of material at needle tip after material is
dispensed. Snuff back is the when the pump operates in the opposite direction for a short
period and causes the material to flow in the opposite direction also. Snuff back removes
the fluid pressure from the static mixer and needle to stop strings or drips at the needle tip.
WARNING: Snuff back makes the pumps operate in the opposite direction and it is
possible that mixed material from the static mixer is pulled back into the pumps. Use
the minimum snuff back or material will cure in the pump.
1. Use PVA portal to adjust the snuff back time for your application.
2. If the needle tip drips or has strings of material when the valve is closed, increase
snuff back.
3. If material cures in the pump assembly, decrease snuff back.
4. Contact PVA for additional information on snuff back adjustment.
PCP Series Manual
Revision B / October 2021
Pump Shutdown Procedure
1. Remove the needle from the manifold.
2. Purge material through the manifold.
3. Completely clean the manifold material outlet.
4. Install a night cap on the manifold material outlet.
5. Release the fluid supply pressure. Refer to the workcell manual if necessary.
PCP Series Manual
Revision B / October 2021
Disassemble and Clean the Pump
Remove the Pump from the Workcell
1. Remove the motor connection from the motor assembly of the pump.
2. Turn the luer lock dispense tip counterclockwise and pull to remove.
3. Discard the luer lock dispense tip.
4. Use a wrench to remove the material fitting from the fluid body.
5. Install a cap on the material fitting.
6. Use a 2.5 mm hex key to remove the bolt from the back of mount plate in the back
of the fluid body.
Figure 2: Remove Pump from Workcell
7. Remove the pump from the workcell.