3D Printer - Ultimaker 2+

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  • This machine should not be operated without induction.
  • This machine should not be left unattended during operation.


This 3D printer is an Ultimaker 2+ that belongs to South London Makerspace. It is a Fused Deposition Modeling (FDM) machine used for Additive Manufacturing/Rapid Prototyping. This machine should not be left unattended during operation.


  • Manufacturer: Ultimaker
  • Build volume: 223 x 223 x 205 mm (considering the clip holding the glass the maximum depth usable is around 210mm)
  • Resolution: up to 20 micron, lower resolution 320 micron
  • Nozzle temperature: 180ºC – 260ºC
  • Bed temperature: 50ºC – 100ºC
  • Nozzle diameter: 0.4mm
  • Filament diameter: 2.85mm

Condition Notes

Donated in new condition November 2014.

Allowed Material

  • PLA

This risk assessment applies specifically to the use of the machine with PLA based filament. At present only PLA material has passed the SLMS risk assessment.

Where to buy materials

Risk Assessment

Description of task

Making three dimensional objects from a digital file. The creation of a 3D printed object achieved using additive processes. The object is created by laying down successive layers of filament plastic material until the entire object is created.

Identification of hazards and risks

  1. Harmful or toxic fumes – Low
  2. Burns to fingers or hands – Low
  3. Fire – Low
  4. Entrapment in moving machinery – Low

Control Measures

  1. The SDS for the filament material used in the 3D printing process states that there is no harmful levels of chemicals in the fumes, and the fumes are not considered an irritant. General ventilation is however advised. This should be reviewed for each new material used.
  2. The risk of burns is reduced because exposed hot area is small. The temperature of the hot end is typically around 210ºC, which can cause an unpleasant burn, but does not pose an extreme risk.
  3. To reduce the risk of fire the Ultimaker should only be operated when an inducted member is present in the area and aware of it’s ongoing operation.
  4. The motors in the Ultimaker are relatively low power, and unlikely to cause serious injury, however long hair or loose clothing could be pulled in, although the machine is not likely to cause serious injury and operates relatively slowly, leaving time to react and turn it off. Also there is signage on the machine and the wall next to the machine indicating the presence of this risk.

Before Use

  • Ensure machine is clear of any debris from previous prints or dust collection.
  • Ensure Cura slicer machine setting are setup to an Ultimaker 2+

During Use

  • Machine should not be left unattended for long periods of time.
  • Machine should only be used with Material listed within the Approved Material list
  • Do not change the default material settings on the machine but do it in slicing software.

After Use

  • Remove your filament using unload procedure.
  • If you used any other material than the recommended PLA you’ll need to flush the nozzle.
  • Ensure machine has been switched off and unplugged.
  • Clean any waste material up.
  • Put back the machine cover.


To use this machine you should undertake a short induction with one of the following members:

3D Printer Induction Waitlist

These members may choose to charge a small fee for their time and materials of up to £5 per user, and the induction will only cover the operation of the machine, further assistance on how to use 3D software, or do other tasks is not covered in the normal induction.

What the induction will cover:

  • Introduction to who you are your interests/expertise.
  • Explain the core concepts of how a 3D printer works and it’s limitations (overhangs, tolerance, circles/holes).
  • Explain about different filament types, highlight that we only use PLA at the moment in the space. What to buy, and where to buy it.
  • Highlight the possible ways an accident could happen and what to do:
  • Burns – Indicate the hot areas (nozzle, bed and motors) of the machine and their typical working temperatures (220ºC/60ºC respectively). Advise if a burn does happen to immediately put the burned area under cold running water for 15 minutes and seek assistance from another member immediately.
  • Entanglement – Highlight the risk of getting hair, fingers, or clothing caught in the belts, motors and other moving parts in the machine. Advise of the location where the switch is.
  • Fire – Advise not to leave the machine unattended while in operation, such as leaving it over night, or going out for food. Ask someone else to take responsibility for monitoring it, or pause the print. Advise the use of a CO2 fire extinguisher if a situation arises as the machine is an electrical device.
  • Respiratory – Advise that the fumes from PLA are not anticipated to cause any respiratory issues, but that before using it is worth advising other members you are going to use it so they may move, or ensure they have medication for their condition (asthma).
  • Demonstrate how to load and unload filament from the machine from the menu.
  • Demonstrate how to slice files using Cura and load them onto an SD card.
  • Test the inductee by asking the user to show and explain how to load and unload filament.

Inducted Members

List of inducted members

List of 3d printer resources and websites


SLMS Ultimaker Custom Fan Shroud