BURR KING MFG. CO., INC
1220 Tamara Lane
Warsaw, MO 65355
www.burrking.com
(660)438-8998 • 800-621-2748
Fax (660)438-8991
Variable Speed Controller Instruction Manual Addendum
Congratulations on the purchase of your new Burr King. Your machine has
been configured with a variable speed controller also know as a VFD (variable fre-
quency drive)
Your VFD operates on 220 volt, single phase power. The VFD converts this
power to 220 volt 3 phase power.
Your machine requires a 15 amp / 220 volt single phase circuit to operate. Ap-
plying three phase power to your preconfigured VFD is not only dangerous to you
it will also damage the VFD and possibly the motor.
If you are not familiar with electrical codes or are uncomfortable with electric-
ity please contact an electrician for further assistance.
About your controller
The VFD controller consists of a start - stop switch and a potentiometer. Since
this controller is used for many different applications we have installed dust tight
plugs on the forward/reversing, and auto/manual switch locations.
Your machine is NOT configured to run in a reverse direction and modifying
your controller to run in a reverse direction is not recommended and will void any
factory warranties. Running your machine in the reverse direction may cause bod-
ily harm. If you need to run your machine is a reverse direction, please contact the
factory for proper components to run your machine without harm to you or the
people that maybe around your machine.
220 Volt/1phz/1.5 HP Motor -grinder kbac27d
Instructions to start your machine
After your machine has been plugged in to the correct volt-
age, move the stop/start switch to the lower most position. Raise
the switch to the upper most/ “START” position and release.
The switch will return to a “RUN’ position. To stop the machine
simply move the switch to the “STOP” position.
The “RUN” position is a neutral position. If the event that
you loose power to the machine, the machine will not automati-
cally start after the power is restored. Also if the controller de-
tects an overload at the motor, it will disengage and not restart
until the operator switches the controller to the “STOP” position,
then returns it to the “START” position.
After switching your machine to “STOP” you will notice that
a braking system will apply a controlled amount of force to re-
duce the time needed for your machine to come to a complete
stop. Your machine may not come to a complete stop prior to
the brake disengaging.
IMPORTANT: If you are running a non-contact rubber wheel on
your machine, this brake may cause the wheel to come loose.
The shutdown procedure for your machine should be first to re-
duce the speed of the machine by moving the potentiometer to
“0” then switching the machine to the stop position.
NOTE: Your machine has been set to turn at 10% speed at “0”.
This is a designed safety measure, and not a defect.
What speed to run your machine
The controller shows the speed in percentage, meaning if
your machine is set to run at 100% it is running approximately
8000 SFPM, and at 50% it is running 4,000 SFPM.
To figure your SFPM please visit our online calculator
at www.burrking.com/SFPM
If you are removing large amounts of material with a coarse
abrasive belt you will want to run your machine at 100% giving
you the best performance. Running at the maximum speed when
using a coarse belt allows the part to run cooler and the operator
to exert less pressure. New generation abrasives are designed to
run at these higher speeds and will perform best when running at
the higher speeds.
If you are removing small amounts, detail work or polishing
with a finer belt you may find that slowing the machine down
will help you control the heat in the part and only remove the
amount of material desired.
Please contact Burr King or your abrasive supplier for more
information on proper speeds for your application and belt selec-
tion. We have knowledge on many of the abrasive belts and can
help you get the most out of your new machine.
Detailed controller information
A startup guide was included with your machine. If your
need a full copy of the manual please visit
https://acim.nidec.com/drives/kbelectronics
Operating Your Variable Speed Machine
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