Sterlco ST500 Series Central Granulator - Manual (Page 44)

44
SETTINGS AND ADJUSTMENTS
SECTION 4-10
Adjusting or Replacing Rotor Knives
BASIC FACTS ABOUT THE KNIVES
All of the rotor knives are ground in sets to equal dimensions. Mount and service them as sets. .
The rotor knives must be mounted tightly against the backs of knife seats in order to make it possible
to achieve consistent knife clearances.
Accurate cutting clearance is obtained by setting the bed knives to a 0.006 in. to 0.008 in. (0.15 mm
to 0.20 mm} gap from the rotor knives.
The bed knives are adjusted by turning captive adjusting screws. For best results, start with the bed
knives adjusted to a wide gap from the rotor knife, and slowly adjust them to the required gap by
turning the screws in the same direction; avoid reversals. Reversals introduce inaccuracies due to
backlash.
TURN OFF AND LOCKOUT the power per OSHA 1910.147 OR ANSI Z244.1-1982 (Lockout/Tag-
out of Energy Sources).
If it is not possible to lock out the power, have an electrician remove the fuses.
Make sure the rotor has come to a complete stop.
The hydraulic cylinders or jackscrews, which open the machine, should not operate until the rotor is
completely stopped. If you discover that the hydraulic cylinders or jackscrews DO operate while the
rotor is still turning, immediately shut down the machine and call for maintenance to adjust it.
Wear gloves to protect against injury from the rotor or bed knives.