Operations - Promac JDG-0332 Operating Instructions Manual

6.0 OPERATIONS

6.1. Setup the drill bit to the ER collet chuck
*Please follow step 6.1.1 and 6.1.2 to set up the drill bit to the
chuck (without tightening)
6.1.1. Determine diameter of your drill bit, and then select
the proper collet and collet chuck.
6.1.2. Insert collet into collet chuck by 45° angle, and tighten
the nut slightly.
6.1.3. Insert drill bit into collet chuck and nuts out 35mm or
so from the collet chuck, but do not tightened the drill
too tight.
6.2.
Align drill bit
6.1.4. Reset the scale ring: turn the ring all the way clockwise,
and then turn it anti-clockwise to the number same as
the drill's size.
6.1.5. Insert the chuck set into the web adjustment shelf.
Then connect it tightly. Turn it clockwise to the end.
6.1.6. Plug the drill to the end and turn it clockwise to the
end.
6.1.7. Turn the chuck set clockwise to the end and tighten it.
6.1.8. Turn the chuck set a little to the anti-clockwise and
taking it out gently.
*Make sure the cutting lip of drill is parallel with the slot of
clamping nut before grinding job started. If it is not parallel,
adjust it again.
Attention: If the cutting lip is downward, must increase the
scale of web adjustment shelf. If it is upward, please decrease
the scale of the web adjustment shelf.
When the flute length of a drill becomes shorter, the web
thickness of a drill would become thicker. So, for the same
diameter of drills, the shorter length of a drill, the higher scale
of web adjustment shelf need to be increased.
6.3. Grind the point angle
Turn the power switch on and wait until the motor rotation
is stable (about 10 seconds), put the chuck set into the point
angle grinding shelf.
The slot of clamping nut must fit with the two pins of the
grinding shelf. Insert the drill gently into grinding shelf until
reach the grinding wheel.
Grind the drill by moving left and right until the grinding
sound disappears. And then turn to the other side, do the
same to grind the drill.
* The grinding size of drill is 2mm-13mm(15mm）
* The point angle of drill is from 95°to 135°。
* While grinding, don't hold the stem of drill, it will affect
the accuracy.
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