General Electrical Cautions
This machine should be grounded in accordance with the National Electrical Code and local codes and ordinances. This work should be done by a qualified electrician. The machine should be grounded to protect the user from electrical shock.
Wire sizes
Caution: for circuits which are far away from the electrical service box, the wire size must be in- creased 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 accord- ing to the following table is recommended:
Conductor length | AWG (American wire gauge) number | |
|
|
|
240 volt lines | 120 volt lines | |
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
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Abrasive sanding can be hazardous to operators and bystanders. Sanding sparks, chips and dust particles thrown off by the sanding disc can cause serious injury by contact or inhalation. To avoid injuries you must comply with the following safety requirements:
1.Always wear protective eyewear when operating machinery. Eye wear shall be impact resistant, protective safety glasses with side shields which comply with ANSI Z87.1. Use of eye wear which does not comply with ANSI Z87.1 specifications could result in severe injury from breakage of eye protec- tion. See Figure A, below.
2.Wear leather safety gloves, arm guards, leather aprons and safety shoes.
3.A dust collection system is recommended,
Operator shall also wear a dust mask at all times. See Figure B, below.
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 jamb 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 operating accurately and smoothly, immediately stop the motor and make repairs before attempting any sanding operations.
7.Abrasive discs must be stored in a controlled environment area. Relative humidity should be 35% to 50% and the temperature should be between 60 and 80 degrees Farenheit. Failure to do so could cause premature disc failure.
8.Examine the face of the sanding disc carefully. Excessive sanding which wears down to the backing material can tearing of 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 accurately centered on the drive wheel. Failure to do so could cause a serious unbalanced condition.
10.Always present the workpiece to the wheel while resting 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 shall be worn. See Figure C.
12.Personal hearing protection such as ear plugs or ear muffs shall be used to protect against the effect of noise exposure. See Figure D.
Figure A | Figure B | Figure C | Figure D |
