Delta 31-280 User Manual
INSTRUCTION MANUAL
Sanding Center
6" Belt/12" Disc Sander
(Model 31-280)
PART NO. 406-12-651-0004 - 07-31-01)
Copyright © 2001 Delta Machinery
To learn more about DELTA MACHINERY
visit our website at: www.deltamachinery.com.
For Parts, Service, Warranty or other Assistance,
please call
1-800-223-7278 (In Canada call 1-800-463-3582).
2
GENERAL SAFETY RULES
Woodworking can be dangerous if safe and proper operating procedures are not followed. As with all machinery, there are certain hazards involved with the operation of the product. Using the machine with respect and caution will considerably lessen
the possibility of personal injury. However, if normal safety precautions are overlooked or ignored, personal injury to the operator may result. Safety equipment such as guards, push sticks, hold-downs, featherboards, goggles, dust masks and hearing
protection can reduce your potential for injury. But even the best guard won’t make up for poor judgment, carelessness or inattention. Always use common sense
and exercise caution
in the workshop. If a procedure feels dangerous, don’t try it. Figure
out an alternative procedure that feels safer. REMEMBER: Your personal safety is your responsibility.
This machine was designed for certain applications only. Delta Machinery strongly recommends that this machine not be modified and/or used for any application other than that for which it was designed. If you have any questions relative to a particular application, DO NOT use the machine until you have first contacted Delta to determine if it can or should be performed on
the product
.
Technical Service Manager
Delta Machinery
4825 Highway 45 North
Jackson, TN 38305
(IN CANADA: 505 SOUTHGATE DRIVE, GUELPH, ONTARIO N1H 6M7)
WARNING: FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY!
1. FOR YOUR OWN SAFETY, READ INSTRUCTION
MANUAL BEFORE OPERATING THE TOOL. Learn the tool’s
application and limitations as well as the specific hazards peculiar to it.
2. KEEP GUARDS IN PLACE and in working order.
3. ALWAYS WEAR EYE PROTECTION.
Wear safety glasses.
Everyday eyeglasses only have impact resistant lenses; they
are not safety glasses. Also use face or dust mask if cutting
operation is dusty. These safety glasses must conform to
ANSI Z87.1 requirements. Note: Approved glasses have Z87
printed or stamped on them.
4. REMOVE ADJUSTING KEYS AND WRENCHES. Form
habit of checking to see that keys and adjusting wrenches are
removed from tool before turning it “on”.
5. KEEP WORK AREA CLEAN. Cluttered areas and benches
invite accidents.
6. DON’T USE IN DANGEROUS ENVIRONMENT. Don’t use
power tools in damp or wet locations, or expose them to rain.
Keep work area well-lighted.
7. KEEP CHILDREN AND VISITORS AWAY. All children and
visitors should be kept a safe distance from work area.
8. MAKE WORKSHOP CHILDPROOF – with padlocks,
master switches, or by removing starter keys.
9. DON’T FORCE TOOL. It will do the job better and be safer
at the rate for which it was designed.
10. USE RIGHT TOOL. Don’t force tool or attachment to do a
job for which it was not designed.
11. WEAR PROPER APPAREL. No loose clothing, gloves,
neckties, rings, bracelets, or other jewelry to get caught in moving parts. Nonslip footwear is recommended. Wear protective
hair covering to contain long hair.
12. SECURE WORK. Use clamps or a vise to hold work when
practical. It’s safer than using your hand and frees both hands to
operate tool.
13. DON’T OVERREACH. Keep proper footing and balance at
all times.
14. MAINTAIN TOOLS IN TOP CONDITION. Keep tools sharp
and clean for best and safest performance. Follow instructions
for lubricating and changing accessories.
15. DISCONNECT TOOLS before servicing and when changing accessories such as blades, bits, cutters, etc.
16. USE RECOMMENDED ACCESSORIES. The use of accessories and attachments not recommended by Delta may cause
hazards or risk of injury to persons.
17. REDUCE THE RISK OF UNINTENTIONAL STARTING.
Make sure switch is in “OFF” position before plugging in power
cord.
In the event of a power failure, move switch to the
“OFF” position.
18. NEVER STAND ON TOOL. Serious injury could occur if the
tool is tipped or if the cutting tool is accidentally contacted.
19. CHECK DAMAGED PARTS. Before further use of the tool,
a guard or other part that is damaged should be carefully
checked to ensure that it will operate properly and perform its
intended function – check for alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other
conditions that may affect its operation. A guard or other part
that is damaged should be properly repaired or replaced.
20. DIRECTION OF FEED. Feed work into a blade or cutter
against the direction of rotation of the blade or cutter only.
21. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN
POWER OFF. Don’t leave tool until it comes to a complete stop.
22.
STAY ALERT, WATCH WHAT YOU ARE DOING, AND
USE COMMON SENSE WHEN OPERATING A POWER
TOOL. DO NOT USE TOOL WHILE TIRED OR UNDER THE
INFLUENCE OF DRUGS, ALCOHOL, OR MEDICATION. A
moment of inattention while operating power tools may result
in serious personal injury.
23. MAKE SURE THE TOOL IS DISCONNECTED FROM THE
POWER SUPPLY while the motor is being mounted, connected,
or reconnected.
24. THE DUST GENERATED by certain woods and wood
products can be injurious to your health. Always operate
machinery in well ventilated areas and provide for proper dust
removal. Use wood dust collection systems whenever possible.
25.
WARNING: SOME DUST CREATED BY POWER
SANDING, SAWING, GRINDING, DRILLING, AND OTHER
CONSTRUCTION ACTIVITIES contains chemicals known to
cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
· lead from lead-based paints,
· crystalline silica from bricks and cement and other
masonry products, and
· arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how
often you do this type of work. To reduce your exposure to
these chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that
are specially designed to filter out microscopic particles.
SAVE THESE INSTRUCTIONS.
Refer to them often and use them to instruct others
3
ADDITIONAL SAFETY RULES FOR SANDING CENTER
1. WARNING: Do not operate this tool until assembly and installation are complete, according to instructions.
2. WARNING: Unguarded rotating shafts can create an entanglement hazard. ALWAYS COVER THE POWER TAKE-
OFF SHAFT when accessories are not in use.
3. IF YOU ARE NOT thoroughly familiar with the operation of Belt and Disc Sanders, obtain advice from your supervisor,
instructor, and/or other qualified persons.
4. CAUTION: This tool is designed to sand wood or wood-like products only. Sanding or grinding metal could result in fire,
injury, or damage to the product.
5 REMOVE SCRAP PIECES, TOOLS, and other objects from the table before turning the machine “ON.”
6. NEVER START THE TOOL while the work piece is contacting the sanding belt or disc.
7. CHECK TO SEE that the sanding belt runs in the proper direction. A directional arrow is printed on the back side of belt.
8. CHECK THE BELT to see that it is tracking correctly.
9. CHECK THE BELT AND DISC to see that they are not torn or loose.
10. HOLD the work firmly while sanding.
11. MAINTAIN a maximum clearance of 1/16" between the table and the sanding belt or disc.
12. KEEP hands away from abrasive surfaces.
13. USE A BACKSTOP while sanding with the sanding arm in the horizontal position.
14 NEVER wear gloves or hold the work with a rag while sanding.
15. ALWAYS sand on the downward rotation of the disc and hold the work securely on the table. Sanding on the upward
rotation could cause the work piece to be thrown upward.
16. SAND with the grain of the wood.
17. DO NOT sand small workpieces that cannot be safely supported.
18. AVOID awkward hand positions where a sudden slip could cause hand contact with the abrasive surfaces.
19. PROVIDE ADDITIONAL SUPPORT at table height while sanding large work pieces.
20. NEVER perform layout, assembly, or set-up work on the tables while the tool is “ON”.
21. IMPORTANT: When the tool is not in use, the switch should be locked in the “OFF” position to prevent unautho-
rized use.
22 ADDITIONAL INFORMATION regarding the safe and proper operation of this product is available from the National
Safety Council, 1121 Spring Lake Drive, Itasca, IL 60143-3201 in the Accident Prevention Manual for Industrial Operations and
also in the Safety Data Sheets provided by the NSC. Please also refer to the American National Standards Institute ANSI 01.1
Safety Requirements for Woodworking Machinery and the U.S. Department of Labor OSHA 1910.213 Regulations.
POWER CONNECTIONS
A separate electrical circuit should be used for your tools. This circuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cord is used, use only 3-wire extension cords which have 3-prong grounding
type plugs and matching receptacle which will accept the tool’s plug. Before connecting the motor to the power line, make sure
the switch is in the “OFF” position and be sure that the electric current is of the same characteristics as indicated on the tool.
All line connections should make good contact. Running on low voltage will damage the motor.
WARNING: DO NOT EXPOSE THE TOOL TO RAIN OR OPERATE THE TOOL IN DAMP LOCATIONS.
MOTOR SPECIFICATIONS
Your tool is wired for 120 volt, 60 HZ alternating current. Before connecting the tool to the power source, make sure the switch
is in the “OFF” position.
44
Fig. 1 Fig. 2
GROUNDED OUTLET BOX
CURRENT
CARRYING
PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
GROUNDED OUTLET BOX
GROUNDING
MEANS
ADAPTER
GROUNDING INSTRUCTIONS
WARNING: THIS TOOL MUST BE GROUNDED WHILE IN USE TO PROTECT THE OPERATOR FROM
ELECTRIC SHOCK.
1. All grounded, cord-connected tools:
In the event of a malfunction or breakdown, grounding
provides a path of least resistance for electric current to
reduce the risk of electric shock. This tool is equipped with an
electric cord having an equipment-grounding conductor and
a grounding plug. The plug must be plugged into a matching
outlet that is properly installed and grounded in accordance
with all local codes and ordinances.
Do not modify the plug provided - if it will not fit the outlet,
have the proper outlet installed by a qualified electrician.
Improper connection of the equipment-grounding conductor can result in risk of electric shock. The conductor with
insulation having an outer surface that is green with or without yellow stripes is the equipment-grounding conductor. If
repair or replacement of the electric cord or plug is necessary, do not connect the equipment-grounding conductor to
a live terminal.
Check with a qualified electrician or service personnel if the
grounding instructions are not completely understood, or if in
doubt as to whether the tool is properly grounded.
Use only 3-wire extension cords that have 3-prong grounding
type plugs and matching 3-conductor receptacles that
accept the tool’s plug, as shown in Fig. 1.
Repair or replace damaged or worn cord immediately.
2. Grounded, cord-connected tools intended for use on
a supply circuit having a nominal rating less than 150
volts:
If the tool is intended for use on a circuit that has an outlet that
looks like the one illustrated in Fig. 1, the tool will have a
grounding plug that looks like the plug illustrated in Fig. 1.
A temporary adapter, which looks like the adapter illustrated in
Fig. 2, may be used to connect this plug to a matching 2conductor receptacle as shown in Fig. 2 if a properly grounded outlet is not available. The temporary adapter should be
used only until a properly grounded outlet can be installed by
a qualified electrician. The green-colored rigid ear, lug, and the
like, extending from the adapter must be connected to a
permanent ground such as a properly grounded outlet box.
Whenever the adapter is used, it must be held in place with a
metal screw.
NOTE: In Canada, the use of a temporary adapter is not
permitted by the Canadian Electric Code.
3. Grounded, cord-connected tools intended for use on
a supply circuit having a nominal rating between 150 250 volts, inclusive:
If the tool is intended for use on a circuit that has an outlet
that looks like the one illustrated in Fig. 3, the tool will have
a grounding plug that looks like the plug illustrated in Fig. 3.
Make sure the tool is connected to an outlet having the same
configuration as the plug. No adapter is available or should
be used with this tool. If the tool must be reconnected for
use on a different type of electric circuit, the reconnection
should be made by qualified service personnel; and after
reconnection, the tool should comply with all local codes
and ordinances.
WARNING: IN ALL CASES, MAKE CERTAIN THAT
THE RECEPTACLE IN QUESTION IS PROPERLY
GROUNDED. IF YOU ARE NOT SURE, HAVE A QUALIFIED ELECTRICIAN CHECK THE RECEPTACLE.
GROUNDED OUTLET BOX
CURRENT CARRYING PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
Fig. 3
2
5
Use proper extension cords. Make sure your extension cord is in good condition and is a 3-wire extension cord
which has a 3-prong grounding type plug and matching receptacle which will accept the tool’s plug. When using an
extension cord, be sure to use one heavy enough to carry the current of the tool. An undersized cord will cause a
drop in line voltage, resulting in loss of power and overheating. Figs. 4A and 4B show the correct gauge to use
depending on the cord length. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier
the cord.
EXTENSION CORDS
Fig. 4A
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC TOOLS
Ampere Total Length Gauge of
Rating Volts of Cord in Feet Extension Cord
0-6 120
up to
25 18 AWG
0-6 120 25-50 16 AWG
0-6 120 50-100 16 AWG
0-6 120 100-150 14 AWG
6-10 120
up to
25 18 AWG
6-10 120 25-50 16 AWG
6-10 120 50-100 14 AWG
6-10 120 100-150 12 AWG
10-12 120
up to
25 16 AWG
10-12 120 25-50 16 AWG
10-12 120 50-100 14 AWG
10-12 120 100-150 12 AWG
12-16 120
up to
25 14 AWG
12-16 120 25-50 12 AWG
12-16 120
GREATER THAN 50 FEET NOT RECOMMENDED
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC TOOLS
Ampere Total Length Gauge of
Rating Volts of Cord in Feet Extension Cord
0-6 240
up to
50 18 AWG
0-6 240 50-100 16 AWG
0-6 240 100-200 16 AWG
0-6 240 200-300 14 AWG
6-10 240
up to
50 18 AWG
6-10 240 50-100 16 AWG
6-10 240 100-200 14 AWG
6-10 240 200-300 12 AWG
10-12 240
up to
50 16 AWG
10-12 240 50-100 16 AWG
10-12 240 100-200 14 AWG
10-12 240 200-300 12 AWG
12-16 240
up to
50 14 AWG
12-16 240 50-100 12 AWG
12-16 240
GREATER THAN 100 FEET NOT RECOMMENDED
CHANGING VOLTAGE
The motor supplied with this tool is a dual voltage, 120/240
Volt, Single Phase motor and is wired for 120 volts.
To operate the tool at 240 volts:
1. DISCONNECT TOOL FROM POWER SOURCE.
2. Remove the motor cover (A) Fig. 5 by loosening the
six screws that fasten it to the stand.
3. Remove the brown wire from terminal 2. Connect it
to terminal 6 (Fig. 6).
4. Remove the blue wire from terminal 4. Connect it
to terminal 2 (Fig. 6). NOTE: The wires have spade-type
quick connectors. No wire nuts are required.
5. Replace the motor cover removed in STEP 2.
6. Replace the 120 volt plug (supplied with the motor)
with a 240 volt plug that has two flat, current-carrying
prongs, and one round or “U” shaped ground prong.
(See Fig. 3) Use this plug ONLY with the proper mating
3-conductor grounded receptacle (See Fig. 3).
Fig. 5
Fig. 6
BROWN
RED
6
4
BLUE
1
120 VOLTS
240 VOLTS
2
BLUE
RED
6
4
BROWN
1
Fig. 4B
A
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