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¦ | PART VI - HARDWARE MAINTENANCE | ¦ |
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HARDWARE ADJUSTMENTS
AIR PRESSURE
Set AIR PRESSURE to about 80 PSI for best accuracy. However, lower pressures will work. If you plant air fluctuates, set the regulator to the low end so that the dispense valves always see a consistent pressure. Lubricated air is NOT recommended. Micro Blenders should be set to 40 PSI (2.7 bar). Vertical Valves used in removable hoppers on Micro Blenders, and 100 and 200 series blenders, are more accurate at 60 PSI pressure setting.
LEVEL SENSOR Sensor position:
On 200 and 400 models, the sensor should protrude into the mix chamber about 1/4 inch past the inside surface of the stainless mounting plate. If it does not protrude far enough, it will sense the mounting plate itself. If it protrudes too far, it will sense the mix blade. Relocate if necessary.
Adjusting sensor sensitivity:
1.A sensor adjustment is located on the back of the sensor. A small thin screwdriver is required. Some sensors have a black plastic cover that must be removed for access to the adjusting screw.
2.Fill the mix chamber until the sensor is about 3/4 covered.
3.Turn screw
4.Then turn clockwise until the LED just goes ON.
5.Empty the chamber and check to be sure the sensor LED stays
OFF when the mix blade passes near it.
6.If applicable, replace the plastic access cover screw. NOTE: 18 mm sensors, LED logic is reversed, ON when UNCOVERED.
WEIGH BIN DUMP VALVE (SOFT CLOSE)
The WEIGH BIN DUMP VALVE should be adjusted to close softly. An air flow needle valve is installed near the quick disconnect so that air flow to the weigh bin air cylinder may be restricted. Adjust as required for a soft close.
SLIDE VALVES
Slide valves must move very freely. If they seem to jam slightly in the full extended position (closed), this may be due to the cylinder mount being bent. Lifting the blender by the air cylinders, or standing on them will cause this. You can correct this by pressing up or down on the cylinder as required to straighten the mount.
If you process very hard pellets (polycarbinate and glass filled resins), your slide gate dispense valves may stick closed occasionally. We provide spacers that limit the full stoke of the air cylinder. This stops the slide from going any further then the just closed position and prevents jamming. Call us for information.
INTERNAL MIX MOTOR and AUGER FEEDER FUSES
The MIX MOTOR and AUGER FEEDER OUTLETS are driven by internal solid state
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