14
9.0
Operations
Before using your drum sander, review the previous
sections on initial set‐up and adjustment. Before
operating, make sure an abrasive strip is mounted
and a proper dust collection system is connected.
9.1
Basic Operating Procedure
1.
Establish depth of cut.
2.
Start dust collection system.
3.
Turn on the power switch
4.
Start sanding drum.
5.
Start conveyor and select feed rate.
6.
Feed stock through machine.
To feed stock through the sander, rest and hold board
to be sanded on conveyor belt, allowing conveyor
belt to carry board into drum. Once stock is halfway
through, reposition yourself to outfeed side of
machine to receive and control board as it exits.
Board will be forced down against
conveyor table as it begins feeding, causing pinching
hazard. Keep fingers away.
Do not open drum hood until
drum comes to a complete stop.
9.2
Drum & conveyor motor operation
1.
Connect power supply to machine.
2.
Disengage emergency stop by clockwise turning
the red button or pulling it up (A, Figure 9‐1).
Note: Error Indicator (D) may flash continuously to
remind that the conveyor speed dial is NOT set at
OFF position before starting the operation.
The
control system is designed to prevent the conveyor
belt from being activating accidentally. If conveyor
belt motor doesn’t work, turn the dial (C) to OFF and
re‐dial.
3.
Turn on the On/Off switch (B) to start drum
motor.
4.
Rotate conveyor speed dial (C) clockwise to start
and increase speed of conveyor.
Figure 9‐1: control panel
9.3
Setting depth of cut
Adjusting the drum sander for proper contact
between abrasive and stock determines the depth of
cut. The depth of cut is controlled by the height
adjustment handle.
It may take experimentation to determine proper
depth of cut, given the variables of abrasive grit, type
of wood, and feed rate. For best results, use scrap
wood to practice sanding and to develop skill and
familiarity with the machine before doing finish work.
A combination of several variables will determine
proper depth of cut to use, including the following:
1.
Abrasive type and grit size.
2.
Width of piece being processed.
3.
Hardness of piece.
4.
Feed rate of conveyor belt.
NOTE:
The use of a carrier or backer board (not
provided), is recommended for cuts 1,5mm or less.
This is a flat board, usually of wood or MDF, slightly
larger than the workpiece and of even thickness,
placed beneath the workpiece as it is fed through the
sander. The workpiece may be attached to the carrier
with rubber cement, carpenter’s tape or some other
easily removable adhesive. However, some operators
use a rubber or textured surface on the carrier to
help stabilize the workpiece by simple friction.
9.4
Establishing drum height
A good rule of thumb when sanding with grits finer
than 80:
1.
To establish drum height, position stock under
the drum. Do NOT start drum.
2.
Lower drum to the stock thickness, making sure
drum can still be rotated by hand while just
contacting stock.
Do not start drum while in
contact with stock.
3.
Without changing drum height, turn on conveyor
and run the stock out from under the drum. Start
