Use Instructions; Torch Function - CEMONT SHARP 25MC WT Betriebs-Wartungs Und Sicherheitsanleitung

4.0

USE INSTRUCTIONS

After connection operation are complete , clamp to the workpiece
with the ground clamp.
1. Push the button (0 - I) for power supply to ( I ) (Ref. 1 - Picture
1 Page 3.)
2. Regulate air pressure 5 <P> 6 using the control filter knob
(Ref. 2 - Picture 2 Page 4.) Check the manometer located on
the control filter (Ref. 3 - Picture 2 Page 4.)
Picture 2.
A
3. Choose the cutting current by the current regulation-switch
(Ref. 6 - Picture 1 Page 3.) situated on the frontal panel, fol-
lowing the specifications shown in the schedule bellow. Use
the table below to better choose the power needed.
5.0

TORCH FUNCTION

Equip the torch with the appropriate nozzle and shield cap in rela-
tion to the cutting current you intend to use, observing the indica-
tions in the following table:
Current (Amp) Nozzle diameter (mm)
30/35A
50A
80/85A
120A
Start to cut slowly, then increase the speed to obtain the desired
cut quality . To start a cut on the sheetmetal border, align the cen-
ter of the torch to the sheetmetal and press the start button: the
arc cut will start on the border.
Regulate the speed to obtain a good cut. Air plasma will create a
straight arc (stainless steel aluminum) or, a 5° arc Fig.E (Soft
steel). The arc varies depending on speed, material and thick-
ness.
E
6.0 PERFORATION
In some cutting operations, it could be necessary to start the cut
from a point distant from the border. The backfire from this opera-
tion could shorten the life of torchs' components.
USE INSTRUCTIONS
2
3
Shield cap type
1 or 1,2 contact
contact -
1,2
'with spacer
1,4 with spacer
1,8 with spacer
Therefore, it is suggested to do the job as fast as possible. When
doing a perforation (Fig.F).
Slightly incline the torch, so that backfire particles are blown away
by the nozzle (and by the operator) instead of bouncing back to
the torch. Clean slag and incrostations from the protection bush.
Spraying or inmerging the protection bush in an anti-slag sub-
stance, minimizes the quantity of incrostation that would stick to it.
NOTE. THE FOLLOWING SUGGESTIONS SHOULD BE TAK-
EN IN CONSIDERATION FOR ALL CUTTING OPERATION.
1. After completion of all cutting operation, wait 5 minutes be-
fore shutting off the generator. It will give the fan time to cool
and disperd the equipments' heat.
2. In order for components to last longer, don't let the arc pilot
"ON" longer hen necessary.
3. Handle torch components with care and protect them from
damages.
4. For material sostitution use only the safety tool.
5. It is not enough to turn the power switch (0-I) Rif.1 to the po-
sition (0) at the end of operations. Unplug the power cable 5
minutes after the last cut.
READ FREQUENTLY OVER THE SAFETY PRECAUTIONS
GIVEN AT THE BEGINNING OF THIS MANUAL.
7.0 COMMON CUTTING DIFECTS
Trouble shooting for arc cutting operations:
1. Insufficient penetrations.
a. Cutting speed too fast.
b. Not enough power.
c. Eccessive materrial thickness.
d. Torch components damaged or worned out.
2. Main arc goes off.
a. Cutting speed too slow.
b. Noozle is too distant from workpiece.
3. Slag formation.
a. Wrong gas pressure.
b. Wrong cutting power.
c. Torch components worned or damaged.
4. Burned nozzle.
a. Current too high.
b. Noozle damaged or loose.
c. Noozle touching the workpiece.
d. Eccessive slag: low gas plasma pressure.
4 EN
EN
F