Fishman AIRFREE LDS9000 - Manual (Page 24)

24
Manual Mode
Program is ideally suited for priming the dispense tip and manual
dispensing such as potting and beads. In manual mode the parameters and
function of the parameters are exactly the same as program mode. The only
difference is that the system will only dispense fluid for the amount of
time the user holds the foot pedal down.
The Linear Drive System
AirFree PosiLok TM Piston—
The heart of AirFree dispensing
This unique design has made positive displacement with a barrel
reservoir possible. Re-engineering the pneumatic piston concept,
the high interference fit of the piston and the luer lock connection
with the Linear Drive System enables intelligent dispensing. By
increasing the interference between the O.D. of the piston and the
I.D. of the barrel, we are able to completely seal the chamber
eliminating material leakage. The luer lock connection provides
complete control over forward and reverse motion. The intelligent
control unit microprocessor knows the barrel I.D., the distance
traveled forward and the distance traveled backward. With every
dispense cycle the piston moves the exact distance every time,
guaranteed. Drip-free dispensing, air pocket venting and all-plastic
component dispensing are maintained with the new design.
The Dispense Gun—
The precision of AirFree dispensing technology
The motor used inside the dispense gun is a linear actuator. The
linear actuator creates forward motion by rotating nut between
electrically charged poles. The drive screw runs through the nut
located at the center of the motor. The design of the plastic gun
housing captures the top of the drive screw preventing it from
rotation. When electrically charged, the center nut will step from
one magnetic pole to the other, moving the drive screw forward. It
is important to note that the drive screw not rotating allows the
attachment of the PosiLok
TM piston, creating the linear motion
critical to positive displacement. By reversing the charge, we are
able to create reverse motion.
Note:
LDAV one electrical pulse (motor step) = .0005"
MDAV one electrical pulse (motor step) = .00025"
SDAV one electrical pulse (motor step) = .000125"
Defining the System