General Electrical Cautions
This machine should be grounded in accordance with the National Electrical Code and local codes and ordinances. The work should be done by a qualified electrician. The machine should be grounded to protect the user from elec- trical shock.
Wire Sizes
Caution: For circuits that are a great distance from the elec- trical service box, the wire size must be increased in order to deliver ample voltage to the motor. To minimize power losses and to prevent motor overheating and burnout, the use of wire sizes for branch circuits or electrical extension cords according to the following table is recommended:
Conductor length | AWG (American Wire Gauge) number | |
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|
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| 240 volt lines | 120 volt lines |
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| |
No. 14 | No. 14 | |
No. 14 | No. 12 | |
Over 100 feet | No. 12 | No. 8 |
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Safety Requirements for Abrasive Sanding Machines
Abrasive sanding can be hazardous to operators and by- standers. Sanding sparks, chips and dust particles thrown off by the sanding disc can cause serious injury if con- tacted or inhaled. To avoid such injuries you must comply with the following safety requirements:
1.Always wear protective eyewear when operating machin- ery. Eye wear shall be impact resistant, safety glasses with side shields which comply with ANSI Z87.1. Use of eye wear which does not comply with ANSI Z87.1 specifica- tions could result in severe injury from the breakage of the eye protection.
2.Wear leather safety gloves, arm guards, leather aprons and safety shoes.
3.A dust collection system is recommended, The operator should also wear a dust mask at all times.
4.Additional precautions may be necessary for sanding materials which are flammable or have other hazardous properties. You should always consult the manufacturer of such materials for instructions on sanding and handling.
5.Do not force or jam the workpiece into the sanding disc.
6.Before sanding, always allow the motor to come up to operating speed, then check the sanding disc for wobble, runout, or any unbalanced condition. If the disc is not oper- ating accurately and smoothly, immediately stop the motor and make repairs before attempting any sanding opera- tions.
7.Abrasive discs must be stored in a controlled environ- ment area. Relative humidity should be 35% to 50% and the temperature should be between 60o and 80o Fahren- heit. Failure to do so could cause premature disc failure.
8.Examine the face of the sanding disc carefully. Exces- sive sanding that wears down to the backing material can tear the disc. Never use a disc which shows backing, nicks or cuts on the surface or edge or damage due to creasing or poor handling.
9.When installing a new disc, be certain the disc is accu- rately centered on the drive wheel. Failure to do so could cause a serious unbalanced condition.
10.Always present the workpiece to the wheel while rest- ing the workpiece firmly on the table. Failure to do so could result in damage to the workpiece or throwing of the workpiece off the wheel.
11.Safety shoes which comply with ANSI Z41.1 should be worn.
12.Personal hearing protection such as ear plugs or ear muffs should be used to protect against the effect of noise exposure.
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Figure A | Figure B | Figure C | Figure D |
