Safety Procedures; Fastening Of The Electrode In The Electrode Holder; Setting The Grinding Angle - Migatronic GREEN POINTER PRO CUT Guide De L'utilisateur

5. Safety procedures

• Never use the product if the grinding disc is
damaged
• Use only diamond discs recommended by
Migatronic A/S
• Use the product only when all parts of the chamber
is mounted
• Use only the grinder with EP770 grinding liquid
from Migatronic A/S
• Only grind Tungsten electrodes with electrode
holder
• Always use an appropriate size clamp to the
electrode for grinding.
6. Fastening of the electrode
in the electrode holder
Select the size of the electrode clamp that match the
diameter of the electrode and mount it loosely in the
electrode holder. Then insert the electrode into the
clamp, so that approximately 20 mm of the electrode
is sticking out of the clamp. Tighten the clamp with
your fingers, but not so tightened that the electrode
cannot slide in the clamp.
Insert the electrode
with the electrode
holder into the stick-out
setting), placed below
on the right front side
of the grinding (see
picture), until it stops.
Tighten the electrode
with a smooth turn of
the electrode holder clockwise.
Only fasten the electrode as tight, as it does not slide
in the electrode clamp. If the electrode is too tight
fasten, you risk damage of the clamp.
On the back of the stick-
out adjustment, there is
a regulator screw (see
picture), which can be
adjusted to determine the
length of the electrode
sticking out of the clamp.
The manufacturer has set
the regulation screw to
grind approx. 0.3 mm in order to obtain the highest
number of grindings per electrode as possible.
This means, that you can re-grind the electrode up to
450 times. It is necessary to adjust the stick-out as the
diamond wheel wears down.
It is often not necessary to break off metal drops on
the electrode before grinding. The metal drops do not
melt together with the electrode; the grinding process
will remove them.

7. Setting the grinding angle

Adjust the grinding angle
by placing the cursor (1) at
the desired grinding angle.
Tighten the electrode guide
by tightening the screw (2).
Note: the grinding angle
equals half the tip angle!
After the tungsten electrode
is inserted in the electrode
holder, it is inserted in the
angle adjust unit until the
electrode almost touches
the diamond disc. Start the
machine at the on/off switch
and turn the electrode
holder in a calm and steady
pace and with light pressure
until the electrode holder
cannot go further in. Keep
turning the electrode
holder for at least five rounds to get the best possible
grinding result.
It is not necessary to press the electrode hard
against the diamond wheel, a light pressure and the
rotation of the grinding disc is sufficient to grind the
electrode.
Pull the electrode holder back a little, so that the
electrode does not touch the grinding disc. Turn off
the grinder and pull out the electrode holder after
the grinder has stopped turning.
Removed the electrode from the electrode holder
by re-inserting the electrode into the stick-out
adjustment and turn it counterclockwise. Then pull
out the electrode.
To create a flat tip on the electrode after grinding:
• Setting grinding angle to 90° (while grinder is
turned off)
• Put the electrode holder with the electrode in the
angle adjustment again
• Turn the tightening screw on the angle setting
down until you feel the tip of the electrode
touches the grinding wheel.
• Then turn the tightening screw down. A point on
the brass bearing on top of the screw corresponds
to remove 0.1 mm off the tip.
• Pull the electrode away from the grinding disc.
• Start the grinder and gently push down the
electrode holder in a turning movement and the
tip is flattened.
• Turn off the grinder and pull out the electrode
holder.
11
1
2