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Setup
Small Shot Mode
When running dispense cycles that are less than 5
grams, it is recommended that you use small shot
mode on the F4 Series fluid automation system to
effectively maintain material mix and ratio accuracy.
There are several system requirements for running in
small shot mode:
•
The F4 Series system must use a barrel mixing
stack. The system has to control the A and B
valves at the stack.
•
A material regulator must be used with the bar-
rel mixing stack.
•
The small shot for liquid silicone rubber (LSR)
kit (part no. 25C237) is required. The kit
includes a custom software blue token that
must be inserted into FCM2 to enable this fea-
ture.
See the Fluid Automation F4 Series Kits - Accessories
manual 3A3103 for information about the small shot for
liquid silicone rubber (LSR) kit and the stacks and regu-
lators that can be used with the pressure transducer.
Small Shot Operation
The material regulator is used to regulate the outbound
pressure of mixed material to the press and is able to
handle pressure fluctuations on the inbound side. Ide-
ally the inbound pressure should be a minimum of 600
psi above the outbound pressure to ensure constant
pressure on the material regulator.
When the F4 system is running in small shot mode, the
pressure on the inbound side of the material regulator is
managed by using the Low Setpoint and the Fill Above
Setpoint values at the Small Shot Setup screen in the
ADM software. See Small Shot Setup on this page.
Pressure transducers installed at the A and B shutoff
valves on the barrel mixing stack monitor the A and B
pressure of the system up to the stack. When the pres-
sure drops below the Low Setpoint value, the system
dispenses material up to the Fill Above Setpoint value.
For example, if the Low Setpoint is set at 1200 psi and
the Fill Above Setpoint value is set at 600 psi, the sys-
tem dispenses material when the pressure drops below
1200 psi and stops dispensing when the pressure
reaches 1800 psi. If a material regulator is running at
400 psi to the press (outbound), this ensures that the
inbound pressure stays more than 600 psi above the
outbound pressure.
3A8810 A
Small Shot Mode Software Setup
1. Ensure the custom software blue token is inserted
into FCM2.
2. On the ADM, press
screens. Use the right or left arrow key to navigate
to the Small Shot Setup screen in the Menu Bar.
3. Press the
key to enter the screen to make
changes.
4. Use the directional keypad to navigate to the item
to be changed.
5. Use the numeric keypad to enter new values.
6. Press
to accept a new value or selection.
7. When you are finished making changes, exit the
screen using the
F
. 11
IG
Low Setpoint is the pressure threshold that the system
must fall below before it starts dispensing material. The
value can be set between 1200 and 1800 psi.
Fill Above Setpoint is the amount of pressure that the
system adds above the Low Setpoint pressure when
dispensing material. This pressure, which is stored in
the hoses and stack, is used to bleed down the system
while running small shots. This allows the F4 system to
fill a larger volume of material to ensure the system
stays on ratio. This can be set between 400 and 1200
psi.
Setup
to access the Setup
key. See F
. 11.
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