Ransburg MMA-570 Direct_Ind Charge Atomizer A13366 - Manual (Page 53)

BELL CUP PREVENTIVE
MAINTENANCE
It is the user’s responsibility to ensure proper
maintenance of the atomizer bell at all times. Bell
cup failure due to inadequate cleaning or handling
will not be covered under the Warranty. The
“DO NOT” bullets (see “Operator/Maintenance
Warnings” in the “Maintenance” section) listed are
some examples of improper handling which could
adversely affect performance or personnel safety
and should not be attempted for any reason.
Bell Cup Handling
Always verify that high voltage is turned off and
the atomizer bell has stopped spinning before
performing any type of handling maintenance.
BELL CUP CLEANING -
DIRECT CHARGE
Always verify that high voltage is in degrade mode
of 40-50 kV and that the atomizer bell is spinning
before performing any type of color change or
bell flush cleaning cycle.
To reduce the risk of fire or explosion, the sol-
vents used for exterior cleaning must have flash
points above 100°F (37.8°C). Since electrostatic
equipment is involved, these solvents should also
be non-polar.
Solvents used for equipment flushing should have
flash points equal to or higher than those of the
coating material being sprayed.
1. The atomizer bell will normally be fully
cleaned during a bell flush cycle. Flush-
ing should be done before any down time
or break in production. A bell flush cycle
may also be required while spraying batch
parts of the same color. Verify that high
voltage is in off and that the atomizer bell
is spinning before flushing through the bell.
2. If there is any remaining paint build-up on
any areas of the bell after flushing, the bell
cup should be removed for hand clean-
ing. The bell’s leading edge, splash plate,
serration cuts, and rear of cup are some
examples of areas for special attention.
Bell Cup Soaking (Direct/Indirect)
Bell cups and splash plates can be soaked in a
heated solution for up to 2 hours in an ultrasonic
cleaner (120°F. 49°C maximum). Bell cups alone
may be soaked for an extended amount of time.
BELL CUP CLEANING -
INDIRECT CHARGE
Always verify that high voltage is OFF and that the
atomizer bell is spinning before performing any
type of color change or bell flush cleaning cycle.
To reduce the risk of fire or explosion, the sol-
vents used for exterior cleaning must have flash
points above 100°F (37.8°C). Since electrostatic
equipment is involved, these solvents should also
be non-polar.
Solvents used for equipment flushing should have
flash points equal to or higher than those of the
coating material being sprayed.
1. The atomizer bell will normally be fully cleaned
during a bell flush cycle. Flushing should be
done before any down time or break in produc-
tion. A bell flush cycle may also be required while
spraying batch parts of the same color. Verify
that high voltage is in off and that the atomizer
bell is spinning before flushing through the bell.
2. If there is any remaining paint build-up on
any areas of the bell after flushing, the bell
cup should be removed for hand clean-
ing. The bell’s leading edge, splash plate,
serration cuts, and rear of cup are some
examples of areas for special attention.
3. Visually inspect the bell cup edge for signs
of abrasion. If the edge is excessively worn
or badly chipped as the result of a collision
with a part, replace the cup immediately.
4. Remove splash plate. Inspect for wear on the
bell cup where the fluid leaves the large diameter
of the splash plate. If any undercut in this area,
the cup should be replaced. Also, check the
three (3) pins between the front and rear splash
plate halves. If worn, replace entire assembly.
5. Check the center holes of the splash plate
for wear. Hold splash plate up to a light
source and look straight into the holes. If
light is clearly seen, the angled holes are
worn and the splash plate must be replaced.
MMA-570 Direct/Indirect Charge - Maintenance
Ransburg
LN-9279-13 50