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Manafacture: Metabo File size: 6.86 mb File name: 92680aad-dafd-49fb-8cc1-71b95c9576ae.pdf Language of manual:

This plasma beam quickly vaporizes metal and its high kinetic energy effectively ejects the melted material from the kerf. 5.1 Pilot Arc The pilot arc makes cutting painted or coated material simple, without the need to clean the surface for good electrical conduction. The pilot arc is ignited between the torch's electrode and the cutting tip by high frequency. The cooling gas blows the pilot arc from the tip as a needle-shaped flame, which burns through the paint or coating. The main arc can then start between the work and the electrode. 5.2 Taking the Machine into Operation 1. Attach the male connector (torch side) to the female one (machine side). Make sure that the positioning pin (A) aligns with the corresponding notch. 2. In order to fasten the ring (B), disengage the anti-rotation device by pressing it on proper hole (C) with the enclosed tool (D). Fasten the threaded ring (B). 3. Complete tightening the ring at 5 to 8 Nm torque, at which the distance between the parts is approximately 34 mm. To disconnect torch remove anti-rotation device first by attaching enclosed tool (D) to hole (C). Troubleshooting: In case of air leaks, make sure that • The adaptor is tightened, if not complete operation (steps 1-3). • The o-ring (E) set inside of female adaptor (machine side) is not damaged; if necessary replace it. The plasma central adaptor is a safety device and should be replaced when damaged. Connect machine to compressed air source and set pressure regulator to 5 bar. It is important to have a constant working pressure of 4.5 - 5 bar. A higher pressure reduces the cutting capacity drastically. Be sure that the air supplied is dry and free from condensate and oil. Connect power cable to a properly earthed three-phase outlet. Important! If a plug of different standard has to be installed see wiring diagram for correct connection of the power cable leads. Machine operates on 3 phases and earth. Attach earth clamp to work, ensuring good conductance. If necessary remove paint, coating or rust first. Switch machine on and select desired cutting current. Position torch and activate the torch's trigger switch. Notice! To prevent personal injury and excessive wear of electrode and plasma shroud do not start the pilot arc unless the torch is placed firmly onto the work. 15 With material of more than 5 mm thickness the arc should be started at the edge of the work, or edge of a hole drilled for that purpose, as the molten material will not be blown through the work when starting the cut, but will splash back against the torch. This would very quickly damage the plasma shroud and electrode. Select feed rate so that the spares are ejected from the kerf in a 15-20° angle of the direction of progression. Setting knob for operating regulator (factory set to 5 bar) Pressure gauge Indicator Connector for compressed air supply Water trap il pressure regulator 6 Consumables Electrode, cutting tip, shroud and spring guide are directly exposed to the high radiant heat of the arc. They need to be cleaned regularly. Check for erosion of the electrode's tip, which should not be more than 1.0 -1.5 mm or else the hafnium core may be blown from the electrode, causing a short circuit between electrode and tip. This in turn would ruin the torch body. The tip should be changed if the orifice diameter becomes enlarged or distorted, resulting in poor ignition and cutting capacities. Blackening of the electrode and tip indicates soiled compressed air. Elektra Beckum does not accept any liability for excessive wear of consumables resulting from the use of soiled air. Worn electrodes, worn tips as well as damp and oily air significantly reduce the arc starting capabilities, f Important! A broken shrouds presents a danger of severe personal injury. Replace immediately! 1 6.1 Replacing Electrodes and Cutting Tips In order to positively prevent accidents by electric shock, the shroud is fitted with a safety circuit. Only with the shroud correctly fitted to the torch head can the trigger switch circuit be closed Always disconnect machine from power before servicing! Remove the shroud to deactivate the trigger switch. Replace tip or electrode, as required. Replace shroud, making sure it is correctly fitted as otherwise the trigger switch will not work. 7 Principal Machine Components Choke Torch lead connector Transformer Solenoid valve Rotary step switch Rectifier bank (behind PCB) Electronic controls Fan Pilot resistor Earth cable socket Main contactor Pic. 7 - Components models 600, 900 and 1200 DP 16 Pic. 8 - Components Plasma 1204 DP Pic. 9 - Components Plasma 1204 DP Fan Transformer Pilot resistor Rotary step switch Choke Rectifier bank Earth cable socket Solenoid valve Torch lead connector Overload indicator Mains contactor Pilot transformer Low air pressure indicator Printed circuit board with electronic controls Mains ON/OFF switch Contactor Pic. 10 - Top view of controls Plasma 1204...

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