Fawcett EMD-100 - Manual (Page 5)

1 FAWCETT, Inc. LS manual 03/06 Page 6 of 7
OPERATING INSTRUCTIONS
Note: Periodically check dispersion shaft chuck for
tightness prior to starting Machine.
Trial and error will determine the best height position for
the dispersion impeller, which will depend on the mixing
container size you are using, but as a rule of thumb, the
impeller should be no closer than 1” to the bottom of the
mix container, and optimally should be about 1½ times
the blade diameter in height off the bottom. For example,
if the impeller diameter is 2”, the blade will work best
about 3” off the bottom.
Always start and stop the machine in low speed. Turning
on the machine at higher speeds is not recommended,
as it may damage the motor, or more likely, the sudden
start will sling the material being mixed.
Optimum operating speed is viscosity dependent. The
more viscous the material is, the slower the machine
needs to run to achieve dispersion speed. For example,
a 5000 CPS paint base may need 4500-5000 FPM
impeller peripheral tip speed to achieve dispersion; a
less viscous material may need higher tip speed.
You may run up to a 3” diameter impeller on this
machine. Larger diameter impellers may damage the
motor.
Peripheral tip speed may be calculated with the following
equation:
(IMPELLER DIAMETER in inches) x (.262) x (RPM) =
Tip speed in Feet Per Minute (FPM). Thus, for a 2”
diameter impeller, 10,000 RPM = 5240 FPM and 5000
RPM 2620 FPM
Note: This air cooled motor can get HOT, especially if
run at lower speeds under heavy load. Always be
cautious when grasping motor to raise it
Thank you for purchasing a Fawcett mixer.
www.fawcettco.com