Arc welder

From Hitchin Hackspace
Jump to navigation Jump to search

This tool cannot be operated without completing a training course.
Do not wear loose clothing while operating this machine
Disconnect before carrying out maintenance or repair Switch off when not in use Switch off and remove plug from socket when not in use Safety gloves must be worn
Wear protective gloves Wear a welding mask Wear helmet while welding Wear respiratory protection
Protective footwear must be worn Wear safety footwear
Out Of Order
DANGER: To prevent serious eye damage never use this equipment without using the correct eye protection. Bystanders are also at risk!
WARNING: Risk of serious eye injuries from Arc! Use a welding mask!
WARNING: Risk of burns from hot parts!

Equipment Image

Merlin 150 Arc Welder

Safety information / minimum required PPE Details

  • DO NOT use this equipment without using appropriate eye protection.
  • Wear a Welding Mask!
  • Ensure that any bystanders who are observing, or who may glimpse the welding activity, also wear appropriate eye protection.
  • Always wear appropriate gloves / gauntlets / hand protection when welding.
  • Wear a welding apron to protect yourself from weld spatter.
  • Consider wearing a cotton boiler suit to protect your lower body from weld spatter.
  • Wear safety boots
  • Do not tuck trouser legs in to boots. Trouser legs should be over / outside boots. This is to prevent weld spatter / hot material being trapped in boots causing burns.
  • Disconnect the power before when not using the welder.
  • Use Welding screens / blinds / curtains where provided (Do we need to provide blinds for windows to stop people accidentally seeing the arc while walking past the hackspace on the park side and looking through the windows?

Machine name/identifier

  • Manufacturer: SiP Industrial
  • Model Number / Part Number: Merlin 150 Arc Welder

Machine Capacity

  • Mains Supply Voltage = 230/240 V 50Hz
  • Mains Supply Current = 13 A
  • Wattage = 3.2kW
  • Welding Voltage (Uo) = 50V
  • Current = 45A min
  • Weldable Thickness = 6mm Max
  • Welding Rod Diameter = 3.25mm Max

Welding Capacity

Welding Power Adjustment
Weld Depth / Thickness (mm) 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 3.25 3.25 3.25 3.25 3.25 3.25 4 4 - 6 4 - 6 4 - 6 6
Weld Rod Diameter (mm) 1.5 2.0 2.5 3.25
Weld Power Adjustment Gauge


  • Bottom Shelf of the Blue Steel Shelving in the Far Right corner of the workshop. See Also: Where To Find Things Shelving E, Far Right Corner of Workshop Shelf 5

Training Materials

  • Links to videos for training
  • Training documentation

Manuals / Documentation

We havent been able to locate a copy of the manual for this machine yet.

Online / Digital Documentation

Links to any online documentation or PDFs of manuals

Hardcopy / Paper Documentation Location

Identify where hard copies of manuals are located in the hackspace.


Any useful pictures of the machine

Merlin 150 Arc Welder

Merlin 150 Arc Welder
Merlin 150 Arc Welder
Welding Rod
Arc Welder PPE, Mask and Gloves
Arc Welder PPE, Electronic Mask
Arc Welder PPE, Electronic Mask Manual
Arc Welder PPE, Electronic Mask Box

General Operating Procedure

Describe how to:

  • Safety checks before starting.
  • Turn the machine on
  • Operating procedures
  • Turning the machine off.
  • Cleaning after use.
  • State machine should be left / put back in to storage.

Can be broken down in to sub sections

Sub Section 1

Sub Section 2

Sub Section 3

Sub Section 4

Maintenance requirements and schedule

Detail routine maintenance steps and schedules

Every use




6 Monthly


Spares Information

Detail consumables and spare parts. Drive belts, specific lubricants, blades, cutters.

Hackspace Spares

Detail spares stored in the hackspace and where they are located.

Spares Sources

Details of any spares suppliers or consumables suppliers e.g. specific blades or cutters for machines (bandsaw blades, circular saw blades)