14 SUPERMAX OWNER’S MANUAL
both adjustment knobs so that the indicator nee-
dles move to the desired setting at the plus (+) end
of the scale. (See Fig. 9, page 8.) The depth of cut
of the secondary drum should be rechecked each
time a different grit combination is used.
On dual drum machines, fine-tuning the rear
drum settings can help improve performance. Here
is a quick way: Raise the rear drum so it is higher
than the front drum, with the indicators showing a
-3 setting. Place the stock to be sanded under the
front drum. Then raise the conveyor table so the
front drum contacts the wood, but still can be rotat-
ed by hand. Sand the piece with the front drum and
stop the machine. Then insert the stock in from the
back so it is under the rear drum only. Turn down
the rear drum using the plastic adjustment knobs
on each side. Lower the rear drum until it contacts
the stock but still can be rotated by hand. Use this
setting, and note the readings on the depth indica-
tors for future reference.
DISENGAGING THE DRUMS
On dual drum models, either the primary (front) or
secondary (rear) drum may be disengaged so that
the other drum can be used alone. To use the pri-
mary drum as a single-drum sander, disengage the
secondary drum by raising it to the -2 setting on the
indicators on both sides. To use the secondary drum
alone, lower it to the +4 setting on both sides. In
this mode, the table height adjustment handle is
used to determine the depth of cut, which will be
limited to about 1/32 of an inch before the primary
drum starts contacting the work piece.
SELECTING INTELLISAND FEED RATES
Selecting the proper feed rate is essential to proper
finish sanding. The variable feed rate control of the
conveyor belt adjusts the load on the machine; it
can be infinitely adjusted for maximum operating
performance. A faster feed rate allows faster sanding
but fewer revolutions of the drums per inch of
sanding. A slower feed rate provides more revolu-
tions of the drum per inch of sanding to allow a
greater depth of cut and smoother sanding.
The Intellisand control (See Fig. 15) continuously
monitors the load on the drum motor and automat-
ically regulates the speed of the conveyor motor to
maintain the highest feed rate without overload. If
the load on the drum motor increases, the
Intellisand control will decrease the conveyor feed
rate and will stop the conveyor under extreme con-
ditions. If the load on the drum decreases, the
SandSmart control will increase the feed rate but
WILL NOT increase it faster than the manual set-
ting on the switch dial.
For abrasive planing and thicknessing, the feed
rate can be set at any speed after adjusting for the
proper depth of cut. If the load on the drum motor
approaches its optimum due to inconsistent stock,
the feed rate will automatically slow down. As the
load on the drum motor decreases, the feed rate will
automatically increase to its original setting.
When finish sanding with grits finer than 80, the
best finish will be achieved if the conveyor does not
change speeds during operation. While the
Intellisand control will slow the feed rate when the
main motor reaches its optimum, it is advisable to
operate below the regulation point. When the red
indicator light comes on, the Intellisand control has
detected too great a depth of cut and/or too fast a
feed rate. This change in conveyor speed may leave
a detectable mark on finish surfaces. If a mark is vis-
ible, make adjustments by slowing conveyor and/or
lessening the depth of cut and run the stock
through again.
DUAL DRUM
GRIT COMBINATIONS & SETTINGS
ABRASIVE GRIT GRADES
FRONT REAR REAR DRUM
DRUM GRIT DRUM GRIT SETTING
36 36 2.0
36 60 2.5
36 80 2.5
60 80 2.0
60 100 1.5
80 100 1.0
80 120 1.0
100 150 0.5
120 150 0.5
120 180 0.5
150 220 0.5
Note: The grits and settings shown are starting sugges-
tions only. Other combinations and settings are possi-
ble, depending on your particular circumstances.
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