Mosa MAGIC WELD Manual Del Usuario página 51

© MOSA REV.1-11/05
AUTO IDLE
Operation
When the engine is switched on it immediately
reaches a maximum speed of 4000 rpm for
approximately 6/7 seconds for easy start up,
after which it automatically decreases and idles
at 2000 rpm. It remains at this speed until
current is drawn when set to weld or auxiliary
power.
When set to weld mode the machine reaches
maximum engine speed as soon as there is
minimum contact between the tip of the
electrode and the piece to be welded and also
when set to generation drawing a minimum of
250 – 300 W
The machine returns to minimum 6/7 seconds
later if power is not drawn during welding or
generation.
Checking and adjusting idling speed
- Check idling speed when COLD;
- When the engine is switched on it reaches
maximum speed; after 6/7 seconds it
decreases automatically to idle. Check the
speed when the engine idles;
- The idling speed corresponds to 33-35 Vdc
(only for Italy 42-45 Vdc) at the welding sockets
or the equivalent at 2000-2200 rpm.
Minimum welding voltage TOO LOW
- From Fig. 1 proceed as follows:
when the machine idles (engine cold)
●
Keep pin A locked (8 mm spanner) and
●
unscrew nut B (7 mm spanner)
Again with pin A locked, turn nut C clockwise
●
(7 mm spanner) 1 - 3 mm: The more it is
extended the more the idle speed increases
Tighten nut B on pin A and check the idling
●
speed.
Minimum welding voltage TOO HIGH
- From Fig. 1 proceed as follows:
When the machine idles (engine cold)
●
tKeep pin A locked (8 mm spanner) and
●
unscrew nut B 1-3 mm (7 mm spanner)
Again with pin A locked, turn nut C
●
anticlockwise (7 mm spanner) until nut B
touches pin A
Tighten nut B against pin A and check that
●
the idling speed is correct.
Use as a welder
Adjusting the maximum engine speed
FIG. 1
To check that the maximum engine speed is
correct simply measure the welding voltage
(under no-load conditions) at maximum engine
speed which must be 49-51 V (only for Italy 66-
68 Vdc).
Turn screw (A) to adjust the engine speed Fig.
2. Turning the screw clockwise increases the
idling speed , screwing it anticlockwise
decreases the maximum engine speed.
FIG. 2
M
MAGIC WELD 34.1