10
Operation
Please read and understand the operating
instructions prior to working with your MicroCut
875SC.
1) Wear the correct eye protection and clothing,
and follow all safety suggestions.
2) Connect the MicroCut 875SC to a clean, dry
source of compressed air. Set the regulator on
the back of the machine to 70 psi.
3) Connect the MicroCut 875SC to a 220 volt
power supply (See Electrical Connection on
Pg. 7). Turn the Power Switch (Fig. 3, #8) on.
The Input Power LED (Fig. 3, #6) will
illuminate green, the Air Pressure LED (Fig. 3,
#5) will illuminate green, and the Safety
Alarm LED (Fig. 3, #3) will illuminate red.
Press the Reset Button (Fig. 3, #7). As long as
you properly connected the MicroCut 875SC
to a power supply, connected a sufficient air
supply, and installed the torch and torch
consumables correctly, the Reset Button will
turn off the Safety Alarm LED and allow you
to start cutting.
4) Connect the ground clamp to the workpiece
as close to the cutting arc as possible.
5) Using the Cutting Current Adjustment knob
(Fig. 3, #2) select the output current or
output amperage desired. You should base
this setting off the type and thickness of the
material you plan to cut.
6) When ready to cut, place the cutting torch on
the edge of the material and depress the
trigger on the torch handle. The plasma arc
will start immediately. With the plasma arc
perpendicular to the workpiece, begin to
move the plasma torch in the desired
direction and at a speed in which the plasma
arc bends anywhere from 5 to 15 degrees.
The sparks should shoot out beneath the
workpiece. If the sparks shoot up from the
workpiece, slow down and/or adjust the
output current. When you finish cutting,
release the trigger to extinguish the plasma
arc. Please note that air will continue to flow
from the torch for an additional 15 seconds to
cool the plasma torch.
Manual Piercing
When cutting thicker materials, hold the plasma
torch at an angle and slightly off the workpiece. If
you hold the torch perpendicular to the
workpiece, slag, with no place to go, will flow up
and damage the plasma torch consumables.
Depress the torch trigger to start the plasma arc,
and slowly roll the torch perpendicular to the
workpiece. Once you pierce through the material
completely, begin moving the torch in the desired
direction as normal.
Cutting in Manual Mode
Cutting in Automatic Mode
Put the Manual/Automatic Cutting Switch (Fig. 3,
#10) into the Manual (top) position. Make your
cut as normal. When you reach the end of the
workpiece, the arc will extinguish. In order to
reestablish the arc, release and then depress the
trigger once again.
Put the Manual/Automatic Cutting Switch (Fig. 3,
#10) into the Automatic (bottom) position. Make
your cut as normal. When you reach the end of
the workpiece, the arc will extinguish but then
restart when the torch once again meets metal.
CNC Piercing
You can also pierce materials up to 1/2” thick
when connected to a CNC plasma cutting table.
To pierce thick materials when connected to a
CNC plasma cutting table, simply program the
machine torch to begin cutting approximately
1/16” off of the material to be cut.
