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GENERAL CUTTING INFORMATION
To make a square - edged cut along an inside
diameter of a circle, the torch should move counter-
clockwise around the circle. To keep the square
edge along an outside diameter cut, the torch
should travel in a clockwise direction.
DROSS
When dross is present on carbon steel, it is
commonly referred to as either “high speed, slow
speed, or top dross”. Dross present on top of the
plate is normally caused by too great a torch to
plate distance. "Top dross" is normally very easy to
remove and can often be wiped off with a welding
glove. "Slow speed dross" is normally present on
the bottom edge of the plate. It can vary from a
light to heavy bead, but does not adhere tightly to
the cut edge, and can be easily scraped off. "High
speed dross" usually forms a narrow bead along
the bottom of the cut edge and is very difficult to
remove. When cutting a troublesome steel, it is
sometimes useful to reduce the cutting speed to
produce "slow speed dross". Any resultant cleanup
can be accomplished by scraping, not grinding.
19
MAINTENANCE
WARNING. ELECTRIC SHOCK can kill.
Have an electrician install and service
this equipment.
Turn the input power off at the fuse box, disconnect
supply lines and allow machine to sit for five
minutes minimum to allow the power capacitors to
discharge before working inside this equipment.
Do not touch electrically hot parts.
WARNING.
Do not open this machine
and do not introduce anything into its
openings. Power supply must be
disconnected from the machine before each
maintenance and service. After each repair,
perform proper tests to ensure safety.
CAUTION.
The power supply must be
disconnected from the machine before
each maintenance and service. Always
use gloves in compliance with the safety
standards.
ROUTINE MAINTENANCE
Periodically (3-6 months depending on use /
environment), remove the side/top panels of
machine and clean out machine with a low
pressure dry air line paying particular attention to
PC Boards, Fan blades and switchgear. Failure to
maintain plant can void manufacturers warranty.
Inspect input and output cables & hoses for fraying
and cuts, replace if damaged present.
Keep cutting torch and earth cables in good
condition.
Clean air vents to ensure proper air flow and
cooling.
The fan motor has sealed bearings which requires
no maintenance.
Caution:
Water must never come into contact with
the welder.
Regularly check the general condition of the tool.
Check for loose screws, misalignment or binding of
moving parts, cracked or broken parts, damaged
electrical wiring, and any other condition that may
affect its safe operation.
If the supply cord requires replacing, the task must
be carried out by the manufacturer, the manufac-
turer’s agent, or an authorised service centre to
avoid a safety hazard.
EVERY THREE MONTHS
Check external air filter, replace if necessary.
Shut off input power; turn off the gas supply. Bleed
down the gas supply. Check air filter and replace if
necessary.
EVERY SIX MONTHS
Check the in-line air filter(s), clean or replace as
required.
Check cables and hoses for leaks or cracks,
replace if necessary.
Check all contactor points for severe arcing or pits,
replace if necessary.
Vacuum dust and dirt out of the entire machine.
Summary of Contents for PLASMA-40
Page 1: ......
Page 4: ...3 IMPORTANT SAFETY INSTRUCTIONS ...
Page 13: ...12 SYMBOL CHART ...
Page 26: ...25 NOTES ...
Page 27: ...26 NOTES ...
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