Aim HPM 350-HD Instruction Manual

OWNER’S MANUAL
&
WARRANTY INFORMATION

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | IMPORTANT SAFETY INSTRUCTIONS:
2
THANK YOU for purchasing an A.I.M. product. This Manual has been
prepared to ensure that you experience years of trouble-free use of
your new welder. Please read this manual and share it with any
personnel that will be involved with the use and care of this
equipment. Your Local Dealer will be able to provide product
orientation and operating instructions. We at American Innovative
Manufacturing believe this equipment and our other products will
help you to be successful. It is our goal to help you make that happen.
This manual contains valuable information concerning how to operate
and maintain your new equipment properly and safely. Please read it
carefully.
Also, please complete and mail the enclosed warranty registration
card. You must send in your warranty registration card within 30 days
or your warranty may be void.
E
For factory assistance or service please call;
Inside the USA and Canada call toll free 1-800-644-2730
If you need assistance or service, first see the “Troubleshooting” section of this book. When
calling –you will need your model and serial numbers. This information can be found on the
back of the main unit.
Model: HPM-350-HD
(Record the following information for easy reference)
Serial Number: ___________________________________
Purchase Date: ___________________________________
Local Representative: ____________________________
Contact Information:

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | IMPORTANT SAFETY INSTRUCTIONS:
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TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS: _____________________________________________ 4
STANDARD EQUIPMENT_________________________________________________________5
FIRST TIME USE_______________________________________________________________ 6
1. Installation of Batteries
a. Safety Precautions
b. Battery Installation Diagram
c. Connecting Battery Cables
CHARGING THE UNIT __________________________________________________________ 6
INDICATOR LIGHTS ____________________________________________________________ 7
PREPARATION ______________________________________________________________ 9
WELDER SETTINGS ___________________________________________________________ 11
OPERATIONS & CARE INSTRUCTIONS ____________________________________________ 12
CHANGING WELD WIRE SIZES __________________________________________________ 13
GENERAL INSTRUCTIONS ______________________________________________________ 14
BATTERY CARE AND MAINTENANCE _____________________________________________ 15
MIG WELDING STATION PERIODIC MAINTENANCE _________________________________ 17
USEFUL OPERATING INFORMATION _____________________________________________ 18
TROUBLE SHOOTING _________________________________________________________ 19
LIMITED WARRANTY _________________________________________________________ 20
PARTS & ACCESSORIES ________________________________________________________ 22
SHIPPING & HANDLING PROCEDURES____________________________________________ 23
WARRANTY REGISTRATION_________________________________________________ ____24
BATTERY MSDS_______________________________________________________________25

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | IMPORTANT SAFETY INSTRUCTIONS:
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IMPORTANT SAFETY INSTRUCTIONS:
WARNING –When operating this equipment, please follow basic precautions, including
the following:
•Read all instructions before using this machine and its attachments.
•Use this equipment only for its intended use.
•All electrical service connections must be made by a qualified electrician. Risk of
electrical shock.
•IMPORTANT! The welder may only be used by qualified personnel.
•Do not touch the work piece or welding tips during or immediately after use. Electrodes
become hot and may cause severe burns.
•Make sure to use appropriate eye protection and other PPE when welding. The sparks
and bright arc can injure eyes and unprotected skin.
•Do not weld near flammable materials. Sparks from welding could start a fire.
•Do not operate equipment unless all enclosure panels are properly installed, and
electrical cords are in good condition. Risk of Electrical Shock and Pinch Points.
•Always wear protective face shield and other PPE when working with batteries. Risk of
chemical burns
•Before using any welder, consult your physician if you have a pacemaker or any other
medical conditions. Risk of death or personal injury.
•Failure to take basic safety precautions can result in serious injury and/or property
damage
•Provide covers or other protection for items near the work area to prevent damage
from sparks, welding arc or accidental contact.
•Batteries must be properly maintained; improperly maintained batteries may short out
or explode.
•Contact Factory Service or your local dealer for all repairs or service to unit.
WARNING –Machine must always remain in upright position!
•Shut down unit, and disconnect input power before inspecting, maintaining or servicing
the welder.
•Unplug the welder from the wall outlet before servicing, cleaning, or maintenance. Risk
of electrical shock.
•Cigarettes, sparks or other ignition sources could cause battery to explode. Always
shield eyes and face from battery. Do not charge, use booster cables or adjust post
connections without proper instructions and training. Keep vent caps tight and
batteries level.
•Do not place the welder on unstable or uneven ground. The welder might tip causing
personal injury or serious damage to the welder and other property.
•Do not operate this equipment unless the user is fully trained in the safe use of welders
and related accessories.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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HPM-350-HD Standard Equipment and General Assembly
oWelder
oMIG Torch-Steel
oTorch/Cable Rack
oGround Cable with Clamp
Items to be provided by others (not included with the basic welder)
•Compressed Gas Cylinder
•Compressed gas meters and gauges (available as an option)
•Compressed gas hoses and connection to the female fitting on back of welder
•Welding wire
•Consumable welding contact tips and other normal wear parts.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | The Battery Charge Status reading must be between
25.0 and 28.5 Volts
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FIRST TIME USE
IMPORTANT---BEFORE YOU USE THE UNIT—CHARGE IT!
The Battery Charge Status reading must be between 25.0 and 28.5
Volts
CHARGING THE UNIT
Upon receiving you’re A.I.M. equipment, you must charge the unit before operating.
1. If batteries have not been provided from the factory, proper batteries must be
installed (see battery specification). See Figure #1 for proper battery position
2. The HPM 350-HD requires AGM/Spill proof batteries. Do not use flooded wet
batteries
3. Carefully connect battery terminals as shown.
4. Connect the Battery Charger-Battery twist lock plugs
5. Check/Connect the Charger Power plug
6. Connect the Welder/Charger System to a 110V-15Amp AC power supply
The HPM-350-HD is a battery-operated unit that comes with a specially designed
charger to ensure the power needed to operate the machine.
The A.I.M. charger is designed to automatically regulate the battery voltage level and
should be charging when the machine is not in use. However, you may unplug the
charger unit for an extended period as long as you plug the unit in at least one hour
before operation. Periodic maintenance charging is required to maintain the batteries
and extend battery life. Batteries need to be brought to full charge at least once per
week. Refer to battery manufacturer recommendations if storing the machine for
extended periods.
Battery Specification; Replacement batteries must meet the following requirements.
12V Group 31 or Group 65 AGM Batteries with 950 Cold Cranking Amp Rating or
Better
Two (2) Batteries are required, when batteries need replacing, both batteries should be
replaced at the same time with matching batteries.
Extended Storage:
•Consult battery manufacturer recommendation for extended storage of the
batteries.
•For extended storage disconnect the batteries and/or remove them from the
welder

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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Figure #2- Battery Locations and Orientation
Figure #3 Battery Charger Face

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | INDICATOR LIGHTS
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INDICATOR LIGHTS
There are two sets of three indicator lights displayed on the front panel of the machine; a set
for each of the two batteries.
The RED light indicates there is power to the charger.
The YELLOW light indicates the charger is connected to the battery and charging when
plugged into the 110V-15-amp power source.
The GREEN light indicates high voltage level of the battery –full charge.
When the GREEN light flashes with the YELLOW charge light –this signals the battery is
approaching a full charge.
When the GREEN light is on almost continuously –this indicates maximum charge.
➢Green light should always alternate with yellow light.
➢The alternating GREEN/YELLOW mode is signaling that the charger is in maintenance
mode and maintaining the battery(s) at peak voltage
➢It is recommended that units in daily use be kept plugged in to the power source to
maintain the batteries
➢If storing the unit for long periods, please refer to the battery manufacturer’s
guidelines for battery storage
The voltage required for your charger’s power source is indicated on the back label of the
charger.
Voltages Available:
110 / 120 Volt 60 HZ
Other voltages are available on special order contact A.I.M. for information.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | WELD PREPARATION
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WELD PREPARATION
Carefully examine the surface, looking for defects; cracks, contamination and rust.
Properly prepare the work piece for welding.
When the workpieces are treated with transport coatings applied, initially clean all sides.
The work pieces need to be free of all coatings as required for proper weld technique
Special Note: Preparation is very important. It could be the difference in a successful weld
and an unsuccessful weld. Take the extra time necessary to prepare the panel properly.
Consult Welding and Preparation Specifications

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | WELDER SETTING GUIDLINES
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WELDER SETTING GUIDLINES
Note: The tables below our general guidelines for setting the welder prior to
welding; Actual setting may vary based on many factors, such as; Ambient
temperature and humidity, battery condition, work piece preparation and
position, operator preference and technique etc.
Figure #5 WELDER SETTING TABLES-STEEL/ALUMINUM/SILICON BRONZE
Wire Type Wire Technician AIM HPM-300
Shielding Gas Diameter Control Material Thickness
and Flow Rate (inch) Settings 1/2 in 3/8 in 5/16 in 1/4 in 3/16 in 1/8 in 10 ga 14 ga 16 ga 18 ga 20 ga 22 ga 24 ga
0.023 Power
Feed Speed
Mild Steel 0.030 Power X X 10.5 9 8 7.5 7 6.5 6 5.5 X
75% Ar Feed Speed X X 80% 45% 35% 30% 20% 15% 15% 10% X
25% CO2 0.035 Power 9.5 8.5 8 7 7 6 6 6 6 5.5 X X X
20 cfh Feed Speed 50% 35% 30% 25% 20% 15% 15% 15% 15% 10% X X
X X
0.045 Power 9.5 9 8 7.5 7 6 X X X X X X X
Feed Speed 25% 15% 15% 10% 10% 5% X X X X X X X
0.030 Power
Stainless Steel Feed Speed
HeAr/CO2 0.035 Power 9 8.5 8 7.5 7 6.5 6
20 cfh Feed Speed 45% 40% 35% 30% 25% 20% 20%
Aluminum 0.045 Power 10 9 8 7.5 6.5 5.5
Argon 20 cfh Feed Speed 65% 65% 65% 65% 55% 40%
Feed Speed
Silicon Bronze 0.030 Power 7 6.5 6 5
Argon Feed Speed 65% 55% 50% 45%
20 cfh 0.035 Power
Feed Speed

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | QUICK REFERENCE
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QUICK REFERENCE
OPERATIONS & CARE INSTRUCTIONS
CHARGING
It is recommended that the machine be plugged into a 110V circuit when not in use, in
order to keep the batteries charged, for optimum power. The charging system will not
overcharge and will prolong the life of your batteries. It is preferred that this machine
be plugged into an 110V circuit during any welding procedure.
BATTERY ONLY OPERATION
An important feature of the AIM MIG Welding Station is the ability to produce high
quality welds on battery power alone. The duty cycle for battery welding will vary over a
large range based on work piece thickness, metal alloy, battery condition. For the best
result, start with the battery at or near full charge.
BATTERY CONDITION
The batteries, when provided from the factory are high quality commercial grade
automotive style batteries. See charging instructions above for maintaining the battery
charge state. The batteries should also be inspected periodically (monthly) for tightness
of connections, swelling of the case and leakage. Batteries that show any signs of
distress should be replaced or serviced by a qualified technician. Eye protection, rubber
gloves and other personal protective equipment must be used when servicing the
batteries. The battery MSDS is included with this manual and should be reviewed with
all personnel to be using the welder.
CLEANING
The welder should be kept clean by wiping with a dust cloth. Internal components can
be blown off with low pressure (inert) compressed air. Do Not Pressure Wash the AIM
MIG Welding Station! Damage to the machine will occur and there is a potential for
electrical shock injury to nearby personnel.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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CHANGING WELDING WIRE SPOOL
Caution
•The gear drive can injure or crush fingers in open rolls, Keep Guards in
Place
•Eye protection must be worn, weld wire can spring off reels when
unrestrained; causing personal injury.
•Open Hinged door (on right side of welder when facing the front)
•Choose the correct wire size and alloy for the item to be welded
•To remove a previously used wire spool that is still connected to the drive
motor.
oUse wire cutters to cut the wire where it enters the feed drive
oSecure the wire to the feed spool
oOpen the torch nozzle and remove the contact tip.
oPull old wire through the torch cable and liner
oProperly dispose of old wire scraps.
•Remove spool holder nut and remove the old wire spool, and properly store
•Install the new wire spool on the spool holder.
oWire must feed off the bottom of the spool
•Check wire feed rollers to ensure that the proper rolls with the correct
groove size and style (U or V) are installed for the wire size and alloy you
have selected.
oThe wire is fed by the inboard roll groove. The wire diameter that the
groove is made for is marked on the corresponding side of the feed
roll.
oFlip drive rollers or install the correct ones to get the right grove
aligned with the wire axis.
•Feed the wire from the new spool into the feed rolls
oFor ease of installation the first few inches of the new wire need to be
strait and any burrs or sharp protrusion removed.
•Keep the torch cable as straight as possible when feeding a new wire through
the cable.
•When the wire is through the torch cable the proper size contact tip is
installed and the diffuser cover reinstalled

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | GENERAL INSTRUCTIONS
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GENERAL INSTRUCTIONS
Do not try to weld with low batteries. This will cause a substandard weld and rapid heat build-
up in cables. The charge indicator lights and/or analog voltage meters provide an indication of
the battery charge condition. Monitor those indicators regularly to ensure proper weld
performance.
Do not overheat the machine.Periodic cooling is suggested.
Use “00” Steel Wool to clean the copper surfaces. Oils or contamination could interfere with
the welding process.
Warning: Always turn the welder off and disconnect the power before conducting
maintenance or changing wire spools

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | BATTERY CARE AND MAINTENANCE
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BATTERY CARE AND MAINTENANCE
Note: This machine is equippedwith maintenance free batteries.
Equipment needed
➢Gloves and Goggles
➢Insulated wrench
➢Baking soda
➢Terminal protector spray
➢Voltmeter
➢Discharge tester (if available)
Safety
➢Always wear protective clothing, goggles and gloves when handling batteries
➢Do not smoke or allow open flames near batteries
➢Avoid skin contact with battery electrolyte
➢Use insulated wrenches and tool to avoid shorting batteries
➢In case of contact with electrolyte flush with water immediately, seek medical
treatment
➢Charge batteries in ventilated area
➢Always keep your machine and battery upright.
➢Do not allow a battery to freeze, do not attempt to charge a frozen battery
➢Avoid charging at temperatures over 120 degrees F.
Battery Connections
Faulty connections can lead to poor performance and property damage, meltdown or fire. Do
not change the cable size that your machine was equipped with at the factory. Tighten battery
connections properly using an insulated wrench. Use terminal protection to prevent corrosion.
Battery Ventilation
Do not block or cover ventilation panels. Always charge your machines battery in a properly
vented area away from open flame or other ignition source.
Inspection
Periodically inspect your battery. The battery case must not be swollen or damage, replace the
battery if physical damage is evident. Clean battery top and terminal connections if needed.
Check batter connections and cables; tighten connections if necessary and replace any worn or
damaged cables.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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Cleaning
Clean the top of your battery with a cloth or brush and a solution of baking soda and water. Do
not allow cleaning solution to get inside the battery. Keep the battery cabinet clean and dry.
Charging
Use the charger attached to the machine, this charger is designed to not over charge the
battery. If other charging equipment is used please refer to the charger and battery
manufactures’ recommendations to ensure compatibility. Fully charge your battery after each
use.
Storage
➢Fully charge battery before storing
➢Store in a cool dry location, indoors or under cover
➢If storing for long periods (greater than one month) disconnect battery from
machine
➢Batteries will self-discharge and should be fully charged every 4-6 weeks
➢Fully charge battery when removed from storage before using
➢Avoid direct exposure to heat sources, batteries self-discharge faster in hot weather.
➢Do not allow battery to freeze. Batteries that are not fully charged can freeze during
cold weather.
Battery Recycling
97% of a lead acid battery can be recycled. When it is time to replace your battery
properly dispose of the old one at a licensed battery recycler and help keep the
environment clean.
Material Safety Data Sheet
The MSDS sheet for your battery is attached to this manual.

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: |
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Hybrid Pulse MIG HPM-350 PERIODIC MAINTENANCE
Note: Follow safety instructions before performing maintenance
DAILY Inspect for damage to the machine, torches and gas system. Make any
repairs or adjustments. Check for leakage or unusual odors from the
battery compartment
MONTHLY Inspect cables for cuts or damage.
Use fine steel wool on copper connections.
EVERY 6 MONTHS Check and inspect batteries
Check and tighten all electrical connections
ANNUALLY Remove dust from charging unit. Use low pressure dry compressed air to
blow out dust

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | USEFUL OPERATING INFORMATION
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USEFUL OPERATING INFORMATION
Keeping your battery fully charged after use will increase the life of your battery.
Keep welding tips cool.
A low battery will cause excessive cable heat.
Gases from battery vent out of the machine.
Baking soda should be used to neutralize battery acid in the event of a spill. Refer to MSDS from
battery manufacturer for additional information

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | TROUBLE SHOOTING
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TROUBLE SHOOTING
Problem Check the following:
Unit does not charge–Red light Make sure power cord is plugged in. Check power
supply.
Yellow light does not come on. Is the charger output cord disconnected or
damaged?
Check charger output cord for damages; and a solid
connection.
Check Battery
Green light does not come on. Call for service.
Green light flashes rapidly and Possible battery or charger defect (call Factory)
does not slow (flutter).

AIM Hybrid Pulse MIG Welder -HPM-350-HD
AIM MIG OWNER’S MANUAL Rev. 2019: | LIMITED WARRANTY
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LIMITED WARRANTY
American Innovative Manufacturing LLC (AIM) of Spokane, WA, subject to the terms and conditions
described below, warrants to its original retail purchaser that new AIM equipment sold after the
effective date of this limited warranty is free of defects in material and workmanship at the time it is
shipped by AIM. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
AIM PRODUCTS ARE INTENDED FOR PURCHASE AND USE BY COMMERCIAL/INDUSTRIAL USERS AND
PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF THE EQUIPMENT.
AIM shall honor valid warranty claims on warranted equipment for a period of ONE YEAR in the event of
such a failure within the warranty time period. All warranty time periods start on the date manufacture
of the equipment and not to exceed one year after the equipment is shipped to a distributor or retail
customer.
Within the applicable warranty period AIM will repair or replace any warranted parts or components
that fail due to such defects in material or workmanship. AIM must be notified in writing within thirty
(30) days of such defect or failure, at which time AIM will provide instructions on the warranty claim
procedures to be followed.
AIM’s Limited Warranty shall NOT apply to:
1. Consumable components or parts that fail due to normal wear.
2. Items furnished by AIM but manufactured by others. These items are covered by the
manufacturer’s warranty, if any.
3. Equipment that has been modified by any party other than AIM, or equipment that has been
improperly installed, improperly operated or misused based upon industry standards, or
equipment which has not had reasonable and necessary maintenance, or equipment which has
been used for operation outside of the specifications for the equipment.
In the event of a warranty claim covered by this warranty, the exclusive remedies shall be, at AIM’s
option:
1. Repair,
2. Replacement,
3. The reasonable cost of repair or replacement by an authorized AIM service representative
(where authorized in writing by AIM in appropriate cases), or
4. Payment of or credit for the purchase price (less reasonable depreciation based upon actual
use) upon return of the goods at customer’s risk and expense. AIM’s option of repair or
replacement will be F.O.B., Factory at Spokane, WA, or F.O.B. at an AIM authorized service
representative as determined by AIM. Therefore, no compensation or reimbursement for
transportation costs of any kind will be allowed.
Some states in the U.S.A. do not allow limitations of how long an implied warranty lasts, or the exclusion
of incidental, indirect, special or consequential damages, so the above limitation or exclusion may not
apply to you. This warranty provides specific legal rights, and other rights may be available, but may vary
from state to state.
In Canada, legislation in some provinces provides for certain additional warranties or remedies other
than as stated herein, and to the extent that they may not be waived, the limitations and exclusions set