SifWeld ST180 PRO User manual

Operation Manual
SifWeld ST180 PRO
www.sifweld.com
Peters House
The Orbital Centre
Icknield Way
Letchworth Garden City
Hertfordshire
SG6 1ET
Tel. [phone]
TSX1ST180
TIG
Approved
MMA

DECLARATION OF CONFORMITY
The Low voltage Directive 2006/95/EC of 12 December 2006, entering into force 16 January 2007
The EMC Directive 2004/108/EC, entering into force 20 July 2007
The RoSH Directive 2011/65/EC, entering into force 2 January 2013
Type of Equipment
Welding power source for MMA/TIG welding
Brand name or trade mark
SifWeld®
Type designation etc.
ST180 PRO
Manufacturer or his authorised representative established within the EEA
Name, address, telephone no, fax no
Weldability Sif
Peters House, The Orbital Centre
Icknield Way, Letchworth
Hertfordshire, SG6 1ET
United Kindom
Phone: [phone] Fax: [phone]
The following harmonised standard in force with the EEA has been used in the design:
EN60974-1- Arc welding equipment- Part 1: Welding power sources
EN60974-10 Arc welding equipment - Part 10: Electromagnetic Compatibility (EMC) requirements
Additional information: restrictive use, Class A equipment, intended for use in locations other than residential
By signing this document, the undersigned declares as manufacturer, or the manufacturer’s authorised
representative established within the EEA, that the equipment in question complies with the safety
requirements stated above.
WEEE Directive & Product Disposal
At the end of its serviceable life, this product should not be treated as household
or general waste. It should be handed over to the applicable collection point for
the recycling of electrical and electronic equipment, or returned to the supplier for
disposal.
Place and Date
Letchworth, UK
22-12-2016
Position
Quality Manager
Weldability Sif
Signiture
Keith Mullan

Safety Guidelines
These general safety norms cover both arc welding machines and plasma cutting machines unless
otherwise noted. The equipment must only be used for the purpose it was designed for. Using it in any
other way could result in damage or injury and in breach of the safety rules. Only suitably trained and
competent persons should use the equipment. Operators should respect the safety of other persons.
Prevention against electric shock
The equipment should be installed by a qualified person and in accordance with current standards in
operation. It is the user’s responsibility to ensure that the equipment is connected to a suitable power
supply. Consult with your utility supplier if required. If earth grounding of the work piece is required,
ground it directly with a separate cable. Do not use the equipment with the covers removed. Do not
touch live electrical parts or parts which are electrically charged. Turn off all equipment when not in use.
Cables (both primary supply and welding) should be regularly checked for damage and overheating.
Do not use worn, damaged, under sized or poorly jointed cables. Ensure that you wear the correct
protective clothing, gloves, head and eye protection. Insulate yourself from work and ground using
dry insulating mats or covers big enough to prevent any physical contact with the work ground. Never
touch the electrode if you are in contact with the work ground, or another electrode from a different
machine.
Do not wrap cables over your body. Ensure that you take additional safety precautions when you are
welding in electrically hazardous conditions such as damp environments, wearing wet clothing, and
metal structures. Try to avoid welding in cramped or restricted positions. Ensure that the equipment
is well maintained. Repair or replace damaged or defective parts immediately. Carry out any regular
maintenance in accordance with the manufacturer’s instructions.
Safety against fumes and welding gases
Locate the equipment in a well-ventilated position. Keep your head out of the fumes. Do not breathe
the fumes. Ensure the welding zone is in a well-ventilated area. If this is not possible provision should
be made for suitable fume extraction. If ventilation is poor, wear an approved respirator. Read and
understand the Material Safety Data Sheets (MSDS’s) and the manufacturer’s instructions for metals,
consumable, coatings, cleaners, and de-greasers. Do not weld in locations near any de-greasing,
cleaning, or spraying operations. Be aware that heat and rays of the arc can react with vapours to form
highly toxic and irritating gases. Do not weld on coated metals, unless the coating is removed from the
weld area, the area is well ventilated, and while wearing an air-supplied respirator. The coatings on many
metals can give off toxic fumes if welded.
Prevention against burns and radiation
Arc rays from the welding process produce intense, visible and invisible (ultraviolet and infrared) rays
that can burn eyes and skin. Wear an approved welding helmet fitted with a proper shade of filter lens
to protect your face and eyes when welding or watching. Wear approved safety glasses with side shields
under your helmet. Never use broken or faulty welding helmets. Always ensure there are adequate
protective screens or barriers to protect others from flash, glare and sparks from the welding area. Ensure
that there are adequate warnings that welding or cutting is taking place.
3

Wear suitable protective flame resistant clothing. The sparks and spatter from welding, hot work pieces,
and hot equipment can cause fires and burns. Welding on closed containers, such as tanks, drums, or
pipes, can cause them to explode. Accidental contact of electrode to metal objects can cause arcs,
explosion, overheating, or fire. Check and be sure the area is safe and clear of inflammable material
before carrying out any welding.
Protection against noise
Some welding and cutting operations may produce noise. Wear safety ear protection to protect your
hearing.
Protection from moving parts
When the machine is in operation, keep away from moving parts such as motors and fans. Moving
parts, such as the fan, may cut fingers and hands and snag garments. Protections and coverings may
be removed for maintenance and controls only by qualified personnel, after first disconnecting the
power supply cable. Replace the coverings and protections and close all doors when the intervention is
finished, and before starting the equipment.
Precautions against fire and explosion
Avoid causing fires due to sparks and hot waste or molten metal. Ensure that appropriate fire safety
devices are available near the cutting / welding area. Remove all flammable and combustible materials
from the cutting / welding zone and surrounding areas. Do not cut/weld fuel and lubricant containers,
even if empty. These must be carefully cleaned before they can be cut/welded. Always allow the cut/
welded material to cool before touching it or placing it in contact with combustible or flammable
material. Do not work in atmospheres with high concentrations of combustible fumes, flammable gases
and dust. Always check the work area half an hour after cutting to make sure that no fires have begun
Risks due to magnetic fields
The magnetic fields created by high currents may affect the operation of pacemakers or electronically
controlled medical equipment. Wearers of vital electronic equipment should consult their physician
before beginning any welding, cutting, gouging or spot welding operations. Do not go near welding
equipment with any sensitive electronic equipment as the magnetic fields may cause damage.
RF Declaration
Equipment that complies with directive 2004/108/EC concerning electromagnetic compatibility (EMC)
and the technical requirements of EN60974-10 is designed for use in industrial buildings and not those
for domestic use where electricity is provided via the low voltage public distribution system. Difficulties
may arise in assuring class A electromagnetic compatibility for systems installed in domestic locations
due to conducted and radiated emissions. In the case of electromagnetic problems, it is the
responsibility of the user to resolve the situation. It may be necessary to shield the equipment and fit
suitable filters on the mains supply.
4

5
LF Declaration
Consult the data plate on the equipment for the power supply requirements. Due to the elevated
absorbency of the primary current from the power supply network, high power systems affect the
quality of power provided by the network. Consequently, connection restrictions or maximum
impedance requirements permitted by the network at the public network connection point must be
applied to these systems. In this case the installer or the user is responsible for ensuring the equipment
can be connected, consulting the electricity provider if necessary.
Materials and their disposal
The equipment is manufactured with materials, which do not contain any toxic or poisonous
materials dangerous to the operator. When the equipment is scrapped, it should be dismantled
separating components according to the type of materials. Do not dispose of the equipment with
normal waste. The European Directive 2002/96/EC on Waste Electrical and Electronic Equipment states
the electrical equipment that has reached its end of life must be collected separately and returned to an
environmentally compatible recycling facility.
Handling of Compressed gas cylinders and regulators
All cylinders and pressure regulators used in welding operations should be handled with care.
Never allow the electrode, electrode holder or any other electrically “hot”parts to touch a cylinder.
Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.
Always secure the cylinder safely. Never deface or alter any cylinder.
The following signs and explanations are to remind the user of the potential
risks involved and the dangers of misuse or mistreatment of the welding
machine.
!
RUNNING PARTS MAY BE DANGEROUS!
Keep away from running components,
including the fan.
BE AWARE OF SPARKS AND SPATTER
Wear protective clothing, such as leather
gloves, Flame retardant overalls, boots and
eyewear.
DO NOT TOUCH THERMAL COMPONENTS!
Thermal components may cause severe burns
when in contact with unprotected skin.
ELECTRIC SHOCKS CAN KILL!
Never touch electrical parts. Keep the
equipment in good condition, replace
damaged parts, undertake regular
maintenance according to the instructions.

1. Preface 7
1.1 General 7
1.2 Introduction 8
1.3 Technical Specications 9
2. Installation 10
2.1 Front Panel Layout 11
3. Operation 13
4. Warranty 15
Contents
6

7
1. Preface
Congratulations on choosing your SifWeld ST180 PRO Inverter.
Used correctly, SifWeld products can signicantly increase the productivity of your welding, and provide
years of economical service. This operating manual contains important information on the use,
maintenance and safety of your SifWeld product. Please read the manual carefully before using the
equipment for the rst time. For your own safety and that of your working environment, pay particular
attention to the safety instructions in the manual.
For more information on SifWeld products, consult an authorised SifWeld dealer, or visit the SifWeld web
site at www.sifweld.com. The specications presented in this manual are subject to change without prior
notice.
Disclaimer
While every effort has been made to ensure that the information contained in this guide is accurate and
complete, no liability can be accepted for any errors or omissions. We reserve the right to change the
specication of the product described at any time without prior notice. Do not copy, record, reproduce
or transmit the contents of this guide without prior permission.
1.1 General

This welding machine adopts the latest pulse width modulation (PWM) technology and insulated gate
bipolar transistor (IGBT) inverter technology whilst being portable, small in size, light weight, and with
low consumption.
The machine has excellent performance in MMA and TIG mode. In MMA mode the following can be
controlled: arc starting current arc force and the welding current parameters also can be adjusted sepa-
rately, the welding mode can select by “welding mode selective switch” the welding parameters can be
adjusted by the“control knob”.
This machine has an intelligence protection function inside, such as over-voltage, low-voltage,
over-current, low-current. When the machine shows any failures, the alarm pilot light in the front panel
will light, it will cut the output current and play the role of self-protection and prolong the service life.
Both MMA and TIG mode both display excellent arc characteristics.
This welding machine is suitable for all position welding of a wide range of materials including
aluminium, stainless steel, carbon steel, alloyed steel, titanium and is ideal for pipework, tool die/mould
repair, petrochemical, architectural, car repair, bicycle, handicraft and general fabriction.
Features
• MMA/TIG‘multi process’
• IGBT technology
• Clear, vibrant LED display
• Mono control point
• Compact, robust & lightweight
• ‘Easy grip fold down carry handle’
• Delivers a stable, consistent, smooth welding arc
• Professional welding for all types of electrodes
1.2 Introduction
8

9
1.3 Technical Specications
SifWeld ST180 PRO
Power voltage (V)
Frequency (Hz)
Rated input current (A) l-1 max
Rated input power (kw)
Rated current range (A)
Power factor
No load voltage (VRD)
MMA
33.5
5.9
5-180
97
Duty cycle (%) 40˚C 10min
Efficiency
Protection class
Insulation class
Weight (kg)
Dimensions (mm)
TIG
1ph 230V±10%
50/60
26
4.6
5-180
0.80
10
180Amps @ 35 %
≥80%
IP23S
F
5.7
435 x 180 x 265

10
2. Installation
Unpacking
Check the packaging for any signs of damage. Carefully remove the machine and retain the packaging
until the installation is complete.
Location
The machine should be located in a suitable position and environment. Care should be taken to avoid
moisture, dust, steam, oil or corrosive gases. Place on a secure level surface and ensure that there is
adequate clearance around the machine to ensure natural airflow.
Input connection
Before connecting the machine you should ensure that the correct supply is available. Details of the
machine requirements can be found on the data plate of the machine or in the technical parameters
shown in the manual. The equipment should be connected by a suitably qualified competent person.
Always ensure the equipment has a proper grounding. Never connect the machine to the mains supply
with the panels removed.
Output connections
In general when using manual arc welding electrodes the electrode holder is connected to the positive
terminal and the work return to the negative terminal. Always consult the electrode manufacturer’s data
sheet if you have any doubts.

11
2.1 Front Panel Layout
Welding parameters are adjusted using the Control Knob 1 to move the indicator to the parameter
you would like to adjust, then press the knob to allow the value to be adjusted. The Control Knob should
then be pressed again to set the value.
1
2
3
4
Front View
Power source front panel layout
1. Control knob
2. LED Display
3. Welding Power Output Socket (+)
4. Welding Power Output Socket (-)
5. Alarm LED
6. Power LED
7. Hot start LED
8. Arc force LED
9. Mode switch
5
6
7
8
9

12
TIG Welding
Insert the cable plug with the work
clamp into the“+”socket on the
front panel of the welding machine,
and tighten it clockwise. Insert the
cables plug of the TIG torch into the
“-”socket on the front panel of the
machine and tighten clockwise.
Connect the gas hose to the
regulator / flow meter located on
the shield gas cylinder and connect
to the torch. Select the TIG mode
operation.
MMA welding
Insert the cable plug with electrode
holder into the“+”socket on the
front panel of the welding
machine, and tighten it clockwise.
Insert the cable plug of the work
return lead into the“-”socket on the
front panel of the welding
machine, and tighten it clockwise.
AC
INPUT

13
3. Operation
1. Control knob
2. LED display
3. Alarm LED
4. Arc force LED
5. Hot start
6. Power LED
7. MMA/Lift Tig switch
1
2
3
4
5
6
7
Before starting any welding activity ensure that you have suitable eye protection and protective
clothing. Also take the necessary steps to protect any personnel within the area.
ST180PRO

14
Operating Environment
• Operation temperature range -10°C~+40°C.
• Relative humidity is below 90 % (20°C).
• Protect the machine against heavy rain or in hot circumstance against direct sunshine.
• The content of dust, acid or corrosive gas in the surrounding air or substances can not exceed
normal standard.
• Take care that there is sufficient ventilation during welding and there is at least 30cm distance
between the machine and wall.
Operating Notices
• Read safety guidlines carefully before attempting to use this equipment.
• Connect the ground wire with the machine directly.
• The input power should be single phase, 50-60Hz, 220-230V alternating current (AC).
• In case closing the power switch, no-load voltage may be exported. Do not touch the output
electrode with any part of your body.
• Do not watch the arc with unprotected eyes.
• Ensure good ventilation of the machine for arc welding heat dissipation and improve duty ratio.
• Turn off the machine when the operation has nished.
• When power switch shuts off protectively because of failure. Do not attempt to resolve.
• If there is any problem and no authorized professional maintenance personnel are available, please
contact your local distributor or the manufacturer.

15
4. Warranty
Weldability Sif warrants its customers that all new SifWeld manual welding and cutting equipment purchased shall be free of failure
from defective materials or production for a period of 2 Years from the date of purchase.
This warranty period can be extended to 5 Years from the date of purchase (including the standard warranty period) for customers
in the United Kingdom and Republic Of Ireland; or to 3 Years from date of purchase for customers in all other countries, subject to
registration of the product at www.sifweld.com within the rst year of purchase, and undergoing annual preventative maintenance
servicing with effect from the second year of ownership.
All warranty periods start from the date of purchase from Weldability Sif or an approved SifWeld distributor to the original end user.
The date on the sales invoice is considered the date of purchase for the purpose of the warranty period, or the date of manufacture is
used if proof of purchase is not available. Equipment is warranted to the original owner/user customer, and is not transferable.
Subject to the underlying purchase contract, or, failing such, the Weldability Sif general terms and conditions of sale, both the cost of
replacement parts and Weldability Sif’s labour expense in correcting defects covered by the warranty, will be assumed by Weldability
Sif during the warranty period. Weldability Sif shall in no event be responsible for any direct or indirect damages, third party
expenses, as well as any loss of income/revenue, all of which are specically excluded under this warranty.
The warranty does not cover : Any defects resulting from normal wear and tear; Improper use; Failure to observe the operating
and maintenance instructions; Connection to an incorrect or faulty mains supply; Overloading during use; Any transport or storage
damage; External damage such as re, impact or damage due to natural causes, e.g ooding; Use of unapproved spare or wear parts
or replacement parts not supplied by or approved by Weldability Sif; Any modication or alteration of the equipment; or any other
circumstances beyond the control of Weldability Sif. The warranty period is based on a single 8-hour 5-day shift pattern and the
extended warranty is not applicable to units that are purchased for rental or hire. Weldability Sif will submit an invoice for any repair
work performed outside the scope of the warranty.
Any warranty repair must be performed by Weldability Sif or an Authorised SifWeld Service Centre. The customer is responsible for
all shipping costs and risk associated with items that are returned covered under warranty. Weldability Sif may opt to refund the
purchase price (less any costs and depreciation due to use and wear). Faults/defects found under warranty should be reported to
the Weldability Sif Technical team for review. A warranty claim reference number will be issued and details of the most appropriate
Authorised SifWeld Service Centre will be advised, if appropriate. The customer has no claim to any loan or replacement products
whilst repairs are being performed or replacements are being provided.
The decision about repair or replacement of any defective part(s) is made by Weldability Sif. The replaced part(s) remain(s) property of
Weldability Sif. The warranty extends only to the machine power-source, wire-feed unit and parts contained inside. No other warranty
is expressed or implied, including with regard to the tness of the equipment for any particular application.
Under the terms of the warranty, welding torches, their consumable parts, wire-feed drive-rolls and guide tubes, work return cables
and clamps, electrode holders, connection and extension cables, mains and control leads, plugs, wheels, coolant, etc. are not covered.
The extended warranty is only valid where products have been used strictly in accordance with the operating instructions, all
installation guidelines have been implemented, all legal requirements have been observed, regular preventative maintenance has
been undertaken and a continuous history of annual servicing has been completed and recorded. Failure to register the equipment
online within 1 year of purchase, or to complete the required annual servicing cycle from year 2, will invalidate the extended warranty
period.
Annual preventative maintenance servicing must be arranged and paid-for by the equipment owner/user and carried out by
Weldability Sif or an Authorised SifWeld Service Centre, in order to maintain validity of the extended warranty. Service visits can
be booked online at www.sifweld.com or by calling 0870 330 7757 and will be charged at an average of £65 net per hour of travel/
servicing time. Please allow an average of 2 hours servicing per machine and one hour each way of travel.
Warranty support is facilitated by our network of Authorised SifWeld Service Centres that provide highly experienced capability and
carry-out the professional repair, service and calibration of SifWeld equipment.

www.sifweld.com
®
Peters House, The Orbital Centre, Icknield Way, Letchworth Garden City, Hertfordshire, SG6 1ET
Tel. [phone] | Fax. [phone] | Email. [email protected] | www.sifweld.com