Burr King Model 960-401 - Manual (Page 12)

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DOC 960401OP-99 08/02 REV A
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9. Insure that the grinder is located in a work area that provides clear access to the machine such that
operators have clear and unobstructed access to the machine. The work place should be free from floor
obstructions, trip points, and other faults that may reduce operator safety.
10. Burr King recommends that all three-phase installations include a magnetic starter. Magnetic starters
protect motors from “single phasing”, overheating, etc. thereby reducing the risk of damage to the equipment
and/or fire hazard to your facility.
11. Insure that the model 960-401 AC power source is properly sized, and properly fused. You should
consult a competent electrician, or you may call Burr King Manufacturing for guidance.
Functional operating instructions for the model 960-401 belt grinder
The model 960-401 was fully tested and verified to comply with requirements prior to shipping from the
factory. You should perform the following steps in preparation for using the grinder:
1. With the machine securely bolted to its table, pedestal, and/or floor point connect the AC power to its
source.
2. Insure that the abrasive belt is tensioned properly. To do this, raise the tensioning handle (P/N 937G). You
will hear mechanical clicks as the tensioning ratchet pawl (737F) moves. Generally, the belt will be
adequately tensioned when you hear three to eight clicks. To reduce or release the belt tension slightly raise
the tensioning handle (P/N 737A) then press the button (P/N 737B) in the center of the tensioning handle.
Move the tensioning handle down slightly to reduce belt tension or all the way down to release belt tension.
4. Engage the motor by placing the ON/OFF switch to ON. The belt should rotate smoothly in a CCW
direction about the machine wheel belt path as you face the right side of the machine. If either of these
conditions is a not met turn the machine OFF immediately.
a. If the abrasive belt does not remain centered on the contact wheel (802-4) while the belt is moving
use the tracking adjustment (P/N 921-4) on the upper left side of the machine to track the belt. Turning this
control CW to causes the belt to track to the right, conversely turn the control CCW to causes the belt to
move to the left.
b. If the belt runs in reverse ( up from the floor) you must correct this by changing the main drive
motor rotation direction. A COMPETENT ELECTRICIAN SHOULD PERFORM ALL ELECTRICAL
WORK ON THE MODEL 960-401.
1) Reversed the motor direction of a three-phase motor by reversing any
two legs of the input power lines.
2) Reverse the motor direction of a single phase motor by reversing leads 5 and 8 found
within the metal wiring box located on the motor, or as otherwise instructed on the actual
motor label.
c. If the machine belt tensions, and tracks properly, but has excessive vibration turn the machine OFF
and call the Burr King factory for assistance.
Belt speed
The 960-401 will operate at two different belt speeds (fixed speed model). It is shipped from the factory in
the high-speed mode of approximately 4700 surface feet per minute (SFPM). To change to the lower belt
speed of approximately 2100 SFPM it is necessary to reverse the drive pulleys. To do this first remove
electrical power ten:
• remove the rear idler wheel
• remove the pinch guard
• remove the main belt guard
• locate the hex head bolts that secure the two halves of the main frame together, support the frame
and remove these bolts.
• loose the two elastic hex bolts that secure the motor side of the frame to the motor, do not
remove these.
• remove the v-belt
• remove and reverse the v-pulleys taking care to align them so that the v-belt tracks true and the
pulleys do not drag the frame.
• reassemble
• tighten the v-belt and secure by tightening the elastic nuts.