Burr King Model 85 - Manual (Page 7)

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M254585opinst NEW 2009.doc - 12/30/2009
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Loading media and parts into the machine
If you purchased a media starter kit from Burr King, install the media and compounds into the chamber using the
prescribed quantities and mixtures. Otherwise follow the instructions provided. Do not exceed the media load prescribed
for your machine.
Machine Ceramic media load Part load Max. total load
M25 150 lbs. 100 lbs. 250 lbs.
M45 250 lbs. 225 lbs. 475 lbs.
M85 450 lbs. 450 lbs. 900 lbs.
Please note: Plastic media weights about 60% of an equivalent volume of ceramic media. Walnut shell or corncob weighs
about 20% of an equivalent volume of ceramic media. Unless otherwise known by the factory machines are adjusted at
the factory for ceramic media weight. This means that if you use plastic, walnut, or cob media (i.e.) it may be necessary to
reduce the drive to your machine prior to actual use.. See below
NOTE: Over loading the machine may significantly reduce its service life. If you use steel media note that steel
media weights generally 200 to 350 pounds per cubic foot (Non steel media generally weights 20 to 125 pounds per
cubic foot). To avoid possible machine damages do not add media and parts to the machine such that the total
specified machine load is exceeded.
NOTE: Using too little media in your VibraKING will significantly reduce vibratory motion and adversely affect
processing time and quality. You should have sufficient media in your VibraKING such that the media rises to less
than 6 inches (3-4 inches is ideal) of the rear upper lip of the tub when the machine is operating. Add media as
required to maintain this minimum quantity.
Place your parts into the tub. Note the above part loads. The part load prescribed is not a maximum but rather a nominal
weight. The geometry, material, and weight of your parts will determine the part load you can achieve. The greater the
total load, the harder the machine must work to sustain suitable wave and vibration energy delivery. Do not exceed the
maximum total loads specified. To do so may shorten the life of your machine, and/or diminish its process capability.
Good media and part motion
Vigorous media and part movement evidence good motion. A rotating wave with the highest portion of the wave rising up
the back wall of the machine and the front portion of the wave substantially below the rear portion should exist. With
good action the parts circulate and rise to the rear of the tub, then cascade down the wave to the tub front. Should you not
observe this quality of motion, check that the machine is loaded properly (see the previous table). To reduce the tendency
for the machine to walk reduce the drive energy. You may increase or decrease the vibratory energy delivered to the tub
by adjusting the rotating mass as follows:
CAUTION: Never apply electrical power to this equipment with the maintenance access panels removed, or if
there is any indication of improper or unsafe operation. Failure to observe this caution may create a safety hazard.
a. Disconnect main power.
b. Remove the rear panel.
c. Observe the rotating mass and the position of the counter weights in respect to each other.
d. To increase delivered energy adjust the weights to greater agreement in alignment. Do this by loosening the
weight set screws one at time and rotating the weight on the drive shaft. Tighten the set screws. Conversely, to
reduce delivered energy reduce the alignment of the counter weights.
NOTE: The weights must be aligned in pairs. There must always be an even number of weights at any given
angular displacement. Failure to observe this requirement will shorten the life of the machine and seriously reduce
processing efficiency.
e. Do not adjust the counter weights such that excessive energy is delivered to the media/parts. If you observe that the
media jumps vertically, or if you hear excessive noise generation, or if the media or parts are damaged during processing,
or if the machine walks, you may need to reduce the delivered energy.