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11
Figure 10:
Achieving
accurate angles
using a
machinist's
protractor
Disc
Machinist's
proractor
Note: the table protractor, while accurate, may not
give you the precision required for highly accurate grinding.
For these cases requiring high precision angles, use a
machinist's protractor to establish the required angle
between table and disc as shown in Figure 10.
Adjusting the table angle
The table can be adjusted downward to a maximum
angle of 45 degrees and upward to a maximum angle of 15
degrees.
To adjust the table angle:
1. Be sure the ON/OFF switch is in the off position.
2. Disconnect the machine from its electrical power source
to prevent any chance of an accidental start-up.
3. Unlock the table lock handle.
4. Turn the table tilt handle until the pointer on the angle
protractor is on the angle you want to achieve.
5. Lock the table lock handle.
6. Reconnect the machine to its electrical power source.
Figure 9: Table tilt system
Table
Table tilt
lock handle
Pointer
Table tilt
protractor scale
Crank
Raising and lowering the
table
For grinding most workpieces, the table should be
positioned more-or-less in the middle of the disc. This
allows you to do most of your work on the right-hand side of
the disc where downward motion of the disc provides the
safest grinding torque.
To grind larger workpieces, a larger disc surface area
can be exposed by lowering the table. This is done as
follows:
1. Turn off the ON/OFF switch and disconnect the machine
from its electrical power source to prevent the possibility of
accidental start-up.
2. Unlock the table lock handle.
3. Turn the table height handle until the table is at a height
appropriate to your workpiece size.
4. Lock the table lock handle.
5. Reconnect the machine to the electrical power source.
Note: Never expose more of the grinding disc than
necessary to do an effective job of grinding the workpiece.
The more disc you have exposed, the more hazardous any
operation may become. And, the more disc you have
exposed, the harder it is to control dust when using a
vacuum dust control system.
Table raiser
lock handle
Crank handle
Gearbox
Table raiser
rack
Table
Figure 8: Table raiser system
Machinist's
protractor
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