Cutting Velocity Diagram - ELLETRO PLASMA Manual De Instrucciones

Air keeps flowing out as long as the push-button is held and until
approx. 1 minute after releasing it.
C If the machine is functioning and pressing the push-button no
air flows out of the torch, verify:
That nozzle holder (5) (picture 11) is appropriately fastened
−
and fitted with electrode, diffuser and nozzle.
That thermostat is not temporarily off due to transformer
−
overload or discontinued (pilot lamp C, picture 1). The lamp
that indicates thermostat intervention could be out of order.
That push-button, safety contacts, and control cables on the
−
torch are not discontinued.
That solenoid valve is efficient and that feeding is correct; if
−
not, replace control circuit, after checking the continuity of the
electrical connections.
D If the machine is functioning and pressing the push-button air
flows out of the torch but the arc is not activated, ensure:
That the torch has not short-circuited.
−
That pilot arc contactor is efficient.
−
That the contactor is supplied; if not, replace the control
−
circuit, after checking the electrical circuit.
That the high-tension circuit is efficient.
−
That impedance -has not short-circuited.
−
Attention: if impedance has short circuit, to try to active the
pilot arc many times at a stretch may damage the machine.
3) Cutting
E If pilot arc turns on, but as it approaches to the workpiece to
be cut the machine stops and the pilot lamp signalling
"electrode exhausted" lights up even with a new electrode,
ensure that the reed is efficient
F If the torch arc turns on but then turns off again when the
torch is approached to the workpiece, verify:
That the workpiece is efficiently grounded.
−
That the control circuit is efficient.
−
G If the electrode and the nozzle wear too quickly or cut
quality is poor, ensure:
- That the solenoid valve is efficient and appropriately
supplied. Correct supply only occurs during cutting as the
above mentioned solenoid valve is only supplied under
those conditions. If this is not the case, replace the control
circuit after verifying the continuity of the connections. The
efficiency of the solenoid valve is usually tested observing
the gauge pointer that has a slight movement towards
lower pressure values when the solenoid valve is triggered,
or also feeding it separately with outside voltage.

CUTTING VELOCITY DIAGRAM

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