3.6
Prime the Jet, continued
10.
Remove the purge cup and place a glass slide or piece
of substrate under the nozzle.
Press the
Trigger
button to run the recipe once.
Observe the quality of the drops.
Repeat this several times to ensure adequate priming.
11.
Wipe the nozzle tip of any accumulation. The jet is ready
to operate with the appropriate recipe settings for dispensing.
3.7
Check for Fluid Leaks
Before running a program, it is important to check for fluid leaks. Fluid should not drip
through the orifice. If fluid is leaking through the nozzle tip when the jet valve is closed,
check to see if the jet pressure is set to at least 35 psi (0.24 MPa). Increase the
pressure to 60 psi (0.42 MPa) and check to see if
the leak stops.
There are several areas to check for fluid leaks:
Check to see if fluid leaks out of the weep
hole in the heater block shown in
Figure 3-7. If fluid is leaking, the
diaphragm is either missing or damaged
and should be replaced. The heater block
will need to be removed and the leaking
fluid should be cleaned.
Fluid can leak out of the Luer fitting that attaches the syringe to the feed tube.
Sometimes the Luer fitting is a little snug and hard to twist in completely. If fluid is
leaking, give the fitting an extra turn to seat it completely. If this does not solve
the leaking, change the feed tube and/or the syringe and check again.
Fluid can leak at the junction between the feed tube and the nozzle plate inlet
fitting. The feed tube is connected using a standard barb to the inlet fitting. If fluid
is leaking at the barb end of the fitting, replace the feed tube.
Check for leaks between the diaphragm and the nozzle plate. The nozzle plate
must be attached correctly with screws well tightened. Make sure the Jet valve is
closed. If fluid can be seen leaking under the diaphragm, then the Jet has not
been assembled correctly. Disassemble the dispensing components and inspect,
clean, and/or replace the diaphragm as required. If the leak continues, the
diaphragm or nozzle plate is most likely damaged or dirty, and it should be
cleaned or replaced.
If fluid leaks between the diaphragm and the nozzle plate, the jet will not function
correctly. Dispensing should be discontinued, and the components should be cleaned or
replaced as required.
Figure 3-7: Check for Leaks at Weep Hole
Figure 3-6: Trigger Button
3A6244A
Advanjet HV-2100 Jet Setup and Operation
Page 17 of 22
