Solder Paste Applications - Asymtek Heli-Flow DV-8000 Series Owner's Manual

Solder Paste Applications

Solder Paste applications require a different priming procedure than non-solder paste applications because
of the tendency of the paste to "cold weld" to the feedscrew. This cold welding increases feedscrew wear and
affects dispensing performance.
Tools and Materials Needed
•
Syringe of Solder Paste
•
Syringe of Conditioning Fluid (KC-01)
•
Dispensing Needle (application specific)
CAUTION!
NOTE
This procedure assumes that a clean dispensing cartridge and needle are installed. If not
clean, refer to
1. Perform dispensing system start-up as specified in the applicable dispensing system manual.
2. Use the position controls to move the dispensing head directly over the purge station.
3. Open the dispensing system door/hatch and perform the following:
a. Install a syringe of conditioning fluid on the pump. See
b. Remove the Purge Station Lid. If the purge cup contains fluid, remove it and replace with a
clean cup.
4. Close the dispensing system door/hatch.
5. In the Fluidmove Main Window, click on Run a Program.
The Fluidmove Production Window opens.
NOTE
6. In the Production Window, click on Setup and then double click on Valve - Forward/Reverse
(Figure 4-7).
NOTE
7. In the Valve Forward dialog box click the radio button next to Forward and enter a duration of 60
seconds (1 minute).
The 60-second Valve Forward duration is an estimate of the time necessary for the
conditioning fluid to flow completely through the pump and be dispensed in a steady,
unbroken stream. The preferred duration may vary. Pump motor speed should be at your
production-run setting.
8. Click on the Forward button to start the pump.
9. After the pump has stopped, check for drooling.
"Drooling" means that fluid continues to drip from the tip of the needle when the pump is
OFF. Drooling occurs because there is air in the fluid path or the air pressure is too high.
Operation
Only trained service technicians should perform this procedure.
"Cleaning the Pump" in the
Authorized personnel can also turn the Pump ON and OFF by going to Tools >
I/O Test > Dispenser and toggling the Valve Forward output.
On systems with Dual-Action Dispensing Heads, you will have to select Valve 1
(V1) or Valve 2 (V2), as applicable.
•
Appropriate Personal Protective Equipment
•
Plastic Purge Cup (P/N 58-0030)
•
Clean Cloth with recommended Solvent
Maintenance section.
"Installing/Changing a Fluid Syringe."
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