DRILL DOCTOR 750X Mode D'emploi page 24

Answer:
This happens when the Heel on the bit is higher than the
Cutting Edge (negative relief). To correct this problem,
follow the instructions in "Using the Variable Alignment to
Adjust the Chisel and Relief Angle" on page 19.
You may have a specialty drill bit. Slow and Fast Spiral,
Helix, Turbo Flutes, and Raised Margin drill bits are con-
sidered specialty bits. If you're are getting insufficient
relief on specialty bit types, try aligning all the way in the
(+) setting on the alignment port. This will help improve
the sharpening on these types of bits.
4. Question:
What can I do about flat spots on the bit point between
the Cutting Edge and the Heel?
Answer:
The flat spots on a sharpened bit are the result of an
incomplete or paused half-turn of the Chuck in the Sharp-
ening Port. To correct, apply light, inward pressure and
rotate the Chuck smoothly while sharpening. Be sure to
complete the half-turns.
5. Question:
Why is the drill point off center?
Answer:
If the tip of the drill bit appears to be sharpened off center,
check the following items:
• You may not have done an even number of half-turns
when you sharpened and one face of the bit was
ground more than the other. Always use an even num-
ber of half-turns when you sharpen.
• Make sure that there are no particles between the
Chuck Jaws and the drill bit that could hold it off cen-
ter. Check the drill to ensure it is straight and free of
burrs.
• Make sure the bit is not loose in the Chuck.
• During the sharpening process be sure to keep the
same pressure on each half-turn.
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