CAUTION:
DO NOT ATTEMPT TO LOOSEN "LOCK NUT", THIS WILL RESULT IN
BREAKING THE ADJUSTMENT SCREW.
STH PUMPS
STQ PUMPS
ADJUSTMENT
SCREW
LOCK ADJUSTMENT
(REMOVABLE THREAD LOCK)
ADJUSTMENT
SCREW
HEX LOCK NUT
DO NOT
LOOSEN
3.4
Dispense Volume Values for FMI
STH/STQ Pumps:
NOTE
: To assure the best performance set the pump
displacement volume as large as possible.
FMI pumps
are calibrated at the factory to the maximum value.
Both STH and STQ pumps can be adjusted down to as
little as 10% of the rated flow.
3.5
Adjusting Dispense Volumes:
To adjust dispense volumes rotate the stroke-length
adjustment screw using the appropriate hex driver
(see Required Tools on page 1). To increase the flow,
turn the screw counter-clockwise. To decrease the
flow, turn the screw clockwise
CCW=Increase, CW=Decrease
.
CAUTION: DO NOT LOOSEN THE HEX LOCK
NUT WHEN ADJUSTING THE STROKE RATE. IT IS
SET AT THE FACTORY AND SHOULD NOT BE
TAMPERED WITH. See Figure E
3.6
Lock setting:
Once the pump is calibrated apply
a drop of removable wicking thread lock between the
lower pivot pin and the adjustment screw threads.
See Figure E.
3.7 Dispensing Hints:
1) Speed
- Optimum results for fluids 500 cps or
less is between 120-350 rpm.
2) Cavitation:
Use the largest suction tubing you
can to avoid cavitation.
3) Splashing
can usually be avoided by
modifying dispense tip to larger I.D.and/or
decreasing dispense speed.
4) Hanging drop at dispense tip can be avoided by:
a) Use of rigid discharge tubing
b) Small dispense tip
c) Increasing speed
5) High viscosity dispensing requires:
a) Large suction tubing
b) Pressurizing suction reservoir
6) Bubbles in discharge
a) Suction fitting leak
b) Cavitation
7) Need Help? Call, fax, or email us… We can
help solve almost any fluid control problem.
3.8 SPECIAL MOTORS AND CONTROLLERS
FMI offers a complete variety of stepper motors
and stepper motor controllers from simple quick
start control to complex application specific stepper
motor control. Our standard step motor controllers
are:
SCST
General Purpose Stepper Motor Control for
quick start control of FMI STH and STQ pumps.
ICST
Intelligent Stepper Motor Controller
which includes an embedded microprocessor for
custom programming of FMI stepper motor pumps
to meet specific application operations.
IDS 2000
Industrial Dispenser/Pump which includes
the SCST and FMI pump head integrally mounted
in a rugged stainless steel enclosure.
STH00
0.002
0.025
STH0
0.005
0.050
STH1
0.010
0.100
STQ0
0.008
0.080
STQ1
0.003
0.032
STQ2
0.007
0.072
STQ3
0.128
1.280
NOTE:FOR ADDITIONAL REFERENCES SEE H431 AND Q431
Figure E
3
MODEL
ML/REV
MIN
ML/REV
MAX
5 Aerial Way, Suite 500, Syosset NY 11791 Tel: 516-922-6050 Fax: 516-624-8261
Website: www.fmipump.com Email: [email protected]
ST431-02
