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Inspection

After removing your plasma cutter from its shipping carton,
inspect the plasma cutter for any concealed damage not seen
upon receiving the unit.  Any claims for loss or damage
occurring during shipping must be filed by the purchaser with
the freight company.  

Check the inlet air supply at the rear of the cabinet to be sure no
packing materials have gotten inside to obstruct the airflow to
the plasma torch.

Install the carrying strap according to Figure 1.

Plasma/Cooling Gas Connection

Your Micro Cut 380 has been designed to use clean, dry
compressed air as both the plasma and cooling gas.  Water
and/or oil in the air will significantly reduce the life of the
electrode and the cutting nozzle, at the same time reducing the
quality of the cut.

Install the bracket with 2 Phillips head screws to the back of
your Micro Cut 380 as shown in Fig 2.  Install the regulator in
the quick connect fitting and secure it to the bracket.  Install a _
male quick disconnect fitting to match your air supply.  Using
the airflow switch (Fig 4, #8), adjust the regulator so the gauge
on the front of the machine reads 65 psi with the air flowing.

4

Safety sensing circuitry has been installed to eliminate arc-
initiation if the pressure and volume are inadequate.  If the air
pressure is too low, both the red general alarm led (Fig 3, #7)
and the yellow low air pressure led (Fig 3 #6) will light up.

Damage to your plasma cutter due to excessive water and/or oil
in the air supply line is not covered under warranty.  Your Micro
Cut 380 comes equipped with a regulator/filter.  In addition,
HTP has 2 filters available for removing any impurities from 
the air.  If you already have a drier on your compressor, we
recommend the HTP Super Dry (Part # 25300) which is a
disposable in-line filter.  This filter uses a desiccant to
completely remove all moisture from the air.  The desiccant 
is blue when new and turns clear when the filter needs to 
be discarded.

Plasma/Cooling Gas Pressure

Volume

60 to 75 psi

3 1/2 CFM

If you do not have a drier on your compressor, we strongly
recommend the HTP Max Dry (Part # 25310).  This is a 3-stage
filter, which completely removes all oil and water from the air.
The first stage of the Max Dry removes the water which is
present in the air.  The second stage of the filter removes any oil
which may be in the air along with particulate down to .03
microns.  The final stage is the desiccant drier, which removes
the humidity from the air.  The desiccant in the final stage is
reusable.  It is blue when it is fresh, and changes to pink when it
has absorbed moisture.  Just put the pink desiccant in the oven
to bake the moisture out and reuse.  This filter extends the life
of your air tools and is great for painting also.

WARNING:

Check the air regulator set every day for proper

pressure, volume and water/oil levels.

(Fig 1) Carrying Strap Installation

(Fig 2) Installing Pressure Regulator

Summary of Contents for Micro Cut 380

Page 1: ...HTP Air Plasma Cutting System Micro Cut 380 America Inc HTP America Inc 3200 Nordic Road Arlington Heights IL 60005 4729 1 800 USA WELD 847 357 0700 FAX 847 357 0744 www usaweld com ...

Page 2: ...sed one of the most technologically advanced safest and economical plasma cutters available today The owner s manual has been designed to instruct you on the safe operation of your Micro Cut 380 If you read and follow the instructions in this manual your plasma cutter will provide you with years of trouble free operation If you fail to read and understand this manual as well as correctly follow th...

Page 3: ...in the following periods from the date of delivery of Equipment to the original user 1 Plasma cutters power sources and components 1 year 2 All plasma torches 90 days 3 The electrode cutting nozzle insulator spring and gas diffuser are consumable items WHICH CARRY NO WARRANTY provided that HTP is notified in writing within thirty 30 days of the date of such failure As a matter of general policy on...

Page 4: ...shing equipment handy for instant use After completion of cutting inspect the work area for hazardous hot sparks or metal Electrical Shock Voltages in excess of 110V can cause severe burns or fatal shock Severity of electrical shock is determined by the path and amount of current through the body a Never allow live metal parts to touch bare skin or wet clothing When standing on metal or welding in...

Page 5: ... low air pressure led Fig 3 6 will light up Damage to your plasma cutter due to excessive water and or oil in the air supply line is not covered under warranty Your Micro Cut 380 comes equipped with a regulator filter In addition HTP has 2 filters available for removing any impurities from the air If you already have a drier on your compressor we recommend the HTP Super Dry Part 25300 which is a d...

Page 6: ... or green wire to an input hot line terminal It is also strongly recommended that a fusible line disconnect switch be installed in the input power circuit to the plasma machine This would provide a safe and easy method to remove all electrical power from your plasma system whenever it is necessary to perform internal inspection or servicing BEFORE ATTEMPTING TO MAKE ANY PRIMARY POWER CONNECTIONS T...

Page 7: ...E LIGHT your Micro Cut 380 has a safety sensing circuit which has been installed to eliminate the arc ignition if the air pressure and volume are inadequate If this occurs the yellow air pressure light will be illuminated Once air pressure has been restored the light will go out Your Micro Cut 380 requires 65 psi of air when air is flowing through the torch 8 AIR PURGE SWITCH the air purge switch ...

Page 8: ... the plasma sparks will go beneath the panel you are cutting 7 When piercing a thicker sheet of steel 1 8 thick to 5 16 hold the torch at approximately a 45 degree angle and gradually roll the torch until it is perpendicular to the work piece Fig 6 If the torch is held perpendicular to the work to start there will be no where for the slag to flow and it will come straight up and damage the gas dif...

Page 9: ...ng speed is dependent on material thickness and composition as well as operator proficiency 6 Never turn the machine off immediately after cutting Always allow the post airflow circuitry to run its complete cycle to ensure proper cooling of the torch head 7 It is highly recommended that piercing requirements be kept to a maximum of 75 of rated cutting thickness This will greatly enhance the plasma...

Page 10: ...101 16 Current Transformer 152230 17 Choke Coil 164989 18 Transformer 164990 19 Buckle 322065 Spare Parts List Ref Description Part 21 Belt 322408 22 Frame 322497 23 Front Panel 482829 24 Back Panel 482830 25 Diaphram 482833 26 Side Member 482834 27 Pressure Guage 602072 28 Bottom 644183 29 Cover 655061 30 Work Clamp 712231 31 Ground Receptacle 20320 32 Plasma Torch 38180 33 Primary PCB 990179 34 ...

Page 11: ...wn Ref Description Part 1 Trigger Switch 14009 3 Electrodes 38003 Extended Electrodes 62003E 5 Swirl Ring 62058 6 Cutting Tips 38030 Extended Cutting Tip 62030E 8 Gas Diffuser 38005 9 Handle 38008 10 Torch Head 38002 Complete Torch 38180 ...

Page 12: ...11 MicroCut 380 Wiring Diagram ...

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