Telwin Superior Plasma 90 HF, Руководство по устранению неисправностей и ремонту

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G) Checking torch operation (fig. K)
a)
b)
H) Checking HF operation
(fig. 4)
I) Cutting test
If the load test was positive but arc strike is difficult or even
impossible, the fault could be located in the torch. With the
machine disconnected from the main supply check electrical
continuity in the torch with the torch mounted on the machine:
OUT-:
between the central part of the torch (the nozzle-holder should
be unscrewed to allow access to the inside) and the HF
transformer output (OUT-);
OUT AP:
between the outer threaded part of the torch (the nozzle-holder
should be unscrewed to allow access to the inside) and the
output faston OUT AP connected to J4 on the HF filter board.
For the following test, disconnect all the instruments, disconnect
fastons J2 and J5 on the HF board
;
Before continuing check carefully to make sure all the instruments
have been disconnected. Prevent body contact with the OUT
terminals and with parts inside the power source. Switch on the
machine and with a digital multimeter set on volts make sure that
when the torch button is pressed the voltage over fastons J2 and
J5 (disconnected) is equal to 230Vac 20%;
If the result of the previous test was positive the fault could be in
the HF board or in the HF filter board (torch button). In this case
make sure the wiring is correctly assembled on the boards, if the
problem persists we advise replacing the board concerned.
Switch off the machine and assemble the machine definitively.
With the machine set up as described in the instruction manual,
make a test cut on a piece of iron plate (less than 30 mm thick).
To make the test it is necessary to connect the compressed air
(pressure 5.5 bar). Monitor the dynamic behaviour of the
machine.
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SUPERIOR PLASMA 90 HF
FIGURE K
Electrode
Nozzle
Insulating diffusorors
Nozzle holder
Spacers