Hypertherm MAX200 Machine Torch Plasma Arc Cutting System - Manual (Page 69)

4-4 MAX200 Instruction Manual
14
OPERATION
Pre-operation
1. Ensure that your cutting environment and your clothing meet the safety requirements outlined in the Safety
section.
2. Refer to Cut Charts (page 4-10) for the type and width of material you plan to cut. Select the gas combination
that will create the desired results. Ensure the gas supplies are adequate for the amount of cutting to be done
and are input to the power supply at the proper pressure.
Caution: Input gas pressures below 60 psi (plasma) and 70 psi (shield/cap will cause
the safety interlock circuit to shut down the power supply. If the low pressure
interlocks are bypassed for any reason and low gas pressures occur, the
consumables and torch can
burn out.
3. Select the proper torch parts from the Cut Chart. Install the parts in the torch. (See Changing Consumable Parts
for proper installation, page 4-5.)
4. Attach the MAX200 work clamp to the workpiece. Do not attach work clamp to the section of the workpiece that
will drop off. Make sure that there is good metal-to-metal contact between the work clamp and the workpiece.
5. Apply power to the MAX200 power supply via the wall disconnect switch. See Status Indicators Before Startup
earlier in this section.
Operation
Note: When using the MAX200 machine torch with extended torch leads (100, 125 or 150 feet)
be aware that the 40A consumable parts cannot be used. There is also a slight chance
that the following conditions could occur during cutting with extended torch leads over
75 feet:
• High ambient operating temperature or high volume production cutting may increase the heat
load on the torch cooling system enough to cause the system to shutdown. If this occurs, allow
the system to cool down. Reduce the ambient temperature, if possible or the cutting “arc on”
time.
• The gas pressure response time will increase at the torch at preflow, plasma on and plasma
off. The user may have to increase the lead in of the cut and/or increase the time between
successive cuts.
• There may be a slight incidence of the torch misfiring due to the high frequency energy from
the start circuit being dissipated.