17
17
CHANGING THE DISC
Before changing the abrasive disc:
1. Make sure the power to the sander is turned
OFF
at the source yellow lock insert is removed
from the start/stop switch.
2. Lower the working table (
A
) by first loosening knob (
B
) and then turning hand wheel (
C
)
clockwise (
cw
). Tilt back the guard (
F
) to expose the top of the disc. The sander takes
standard 20” (508mm) diameter cloth or paper back discs. A good recommendation would
be 60 grit for coarse or rough sanding, 80 grit for general purpose medium duty sanding, and
100 grit for fine sanding.
3. Pull at the edge of the mounted grinding disc to get it started, then pull it completely off of the
drive disc.
4. Make sure the drive disc surface is clean. Use a putty knife to remove the old abrasive or if
necessary, use a cleaner which dries film-free such as naptha to remove any old adhesive
(or dust) which might adhere to the drive disc.
5. Remove about 1/3 of the protective cover from the back side of the new grinding disc.
6. Put the exposed edge of the new grinding disc against the drive disc and center the grinding
disc carefully onto the drive disc. Press to hold that section against the drive disc.
7. Rotate the drive disc 180°. The part of the grinding disc which is attached to the drive disc
will now be at the bottom of the drive disc and will be slightly hidden behind the table. With
the drive disc in this position, you can keep the grinding disc accurately centered while
reaching between the grinding disc to remove the rest of the protective backing. Securely
press the rest of the grinding disc against the face of the drive disc.
8. Move the wheel guard forward so it covers the edge of the grinding and drive disc.
9. Adjust the table to working height.
10. Reconnect power to the machine.
11. Insert the yellow lock key and turn the machine "
ON
" and observe the action of the disc for
possible unbalance. When you are sure that everything is operating correctly, you can
resume sanding / grinding operations.
CAUTION:
Avoid material catching and being thrown from the machine.
The gap between the abrasive surface and the table edge must not exceed 3/16"
(4.75mm). If it does, loosen the four motor mount bolts and move the motor forward
to minimize the gap.
Summary of Contents for DG-500
Page 23: ...21 21 PARTS IDENTIFICATION DRAWING...
Page 27: ...25 25 NOTES...
