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MBM PP 35 Manuel D'instructions Et D'entretien page 8

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CUTTING OPERATIONS
PRELIMINARIES
WARNING
Disconnect primary power at the source before assembling or disassembling stacked modules, individual
modules, torch parts, or torch and leads assemblies.
√ √ √ √ √
Check and follow instructions as foreseen in the paragraphs "Safety and Installation" of the present
instructions manual.
TORCH PARTS
√ √ √ √ √
Check the torch for proper assembly. Install proper torch parts for the desired application (refer to
Section called Torch Consumable Parts Selection). NOTE: The power supply will not operate unless
the torch shield cup is fully seated against the PIP (Parts in Place) pins in the torch head.
INPUT POWER
√ √ √ √ √
Check the power source for proper input voltage.
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Make sure the power source meets circuit protection and wiring requirements.
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Plug unit in and close main disconnect switch to supply primary power to the system.
GROUND CABLE
√ √ √ √ √
Check for a solid ground cable connection to the workpiece.
PURGE SYSTEM
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Place the ON/OFF switch to the ON position. The ON light will flicker momentarily as the system
powers up and then stays on. Activate the torch button to initiate gas purge (pre-flow) to will remove
any condensation that may have accumulated in the torch and leads while the system was shut down.
When the gas purge is complete, pilot arc will be initiated
WARNING
Do not initiate pilot arc during adjustment.
CHECKING AIR QUALITY
√ √ √ √ √
To check air quality, deactivate the torch (post-flow) and place welding filter lens in front of the torch.
Any oil or moisture in the air will be visible on the lens. DO NOT initiate pilot arc while checking air
quality.
CUTTING
A. Cutting with a Hand Torch
√ √ √ √ √
The torch can be comfortably held in one hand or steadied with two hands. Choose the technique that
feels most comfortable and allows good control and movement. Position the index finger or thumb to
press the control switch on the torch handle.
√ √ √ √ √
For edge starts, hold the torch perpendicular to the workpiece with the front of the tip on the edge of
the workpiece at the point where the cut is to start. For piercing, angle the torch slightly to direct
sparks away from the torch until the pierce is complete.
√ √ √ √ √
For drag cuts keep the torch in contact with the workpiece. For standoff cutting, hold the torch 1/16 -1/
8 in (2-3 mm) from the work.
√ √ √ √ √
With the torch in starting position, press the control switch. After an initial gas purge (pre-air), the pilot
arc will come on and remain on until the cutting arc starts.
√ √ √ √ √
Once on, the main arc remains on as long as the control switch is held down, unless the torch is
withdrawn from the work or torch motion is too slow. If the cutting arc is interrupted, the pilot arc comes
back on automatically.
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