Safety Procedures; Fastening The Electrode In The Electrode Holder; Setting The Grinding Angle And Grinding - Migatronic GREEN POINTER PRO Mode D'emploi

5. Safety Procedures

• Never use the product if the grinding disc are
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 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 adjustment,
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. The electrode may only be fasten so
tight, that it does not slide in the electrode clamp. If
the electrode is fastened too tight, the clamp may be
damaged.
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, and will be
removed during grinding.

7. Setting the grinding angle and grinding

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 placed 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 are sufficient to
grind the electrode.
If the electrode is pushed
too hard the grinder is
overloaded and the LED on
the side will blink red. If the
overload is continued the
grinder will stop and the LED
will light red continuously.
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.
Remove 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:
• Set the 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
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 removing 0.1 mm off the tip
• Pull the electrode away from the grinding disc
• Start the grinder and gently push down the
electrode holder with a turning movement and the
tip is flattened
• Turn off the grinder and pull out the electrode
holder
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