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0700-0100-0002-0002

Bambu Lab 0700-0100-0002-0002 on a 3D printer: filament tangled

Verified with sources2 sourcesReviewed Oct 4, 2026
Technician coming? See the 2 steps they must show you
Original Prusa MINI filament 3D printer next to a spool of white filament
RAIL P (RAIL.PHOTOGRAPHY)CC0Image source

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Medium

Quick answer

Bambu Lab HMS 0700-0100-0002-0002 means the AMS assist motor is overloaded: the filament may be tangled or stuck. Check the spool, its size and the PTFE tube to the printer before resuming.

Safety first

Stop and check this first

  • Untangle the filament with the print paused and without forcing the PTFE tube. If filament is left inside the toolhead, do not pull it out with the nozzle hot: it burns.

Safe checks you can perform

  • Spool size and rotation
  • Tangles and filament type
  • PTFE tube to the printer
  • Feeder funnel and buffer spring

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Inner AMS PTFE check
  • Do not attempt this professional task: Roller support and active support shaft

What a technician must be able to justify

Technician visit

These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.

These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.

  1. Inner AMS PTFE check

    What they doThe technician takes the AMS apart following Bambu Lab's guide and checks whether the inner PTFE tube is worn.

    They must show youthe tube wear.

    In writingthe tube replaced.

  2. Roller support and active support shaft

    What they doThe technician checks whether the roller support is broken (the main frame is replaced) and whether the active support shaft bearing rubs the rubber, swapping shafts to see whether the fault moves.

    They must show youwhether the fault followed the shaft.

    In writingthe part replaced.

Before accepting a part or repair

Nothing has been shown yet. Do not accept a part swap based on the code alone.

Follow these steps

Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.

  1. Spool size and rotation

    No special tools

    Who:
    you.
    How:
    check the spool is 50 to 68 mm wide and 197 to 202 mm in diameter, and turn it back and forth to feel for tight spots.
    Result that matters:
    whether the spool fits and turns smoothly.
    If it does not fit or is cardboard:
    use another spool or an external holder.
    If it fits:
    look for tangles in the filament.
    Evidence to keep:
    measurements and a photo of the spool.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  2. Tangles and filament type

    No special tools

    Who:
    you.
    How:
    check whether the filament is tangled or sagging and stuck, and whether you use a filament the AMS does not support, such as TPU or damp PVA.
    Result that matters:
    whether there is a tangle or an unsupported filament.
    If it is tangled:
    untangle it before resuming.
    If it is TPU or damp PVA:
    take it out of the AMS.
    Evidence to keep:
    photo of the tangle.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  3. PTFE tube to the printer

    No special tools

    Who:
    you.
    How:
    follow the PTFE tube between the AMS and the printer and check whether it is bent too sharply.
    Result that matters:
    gentle curves with no sharp bends.
    If it is overbent:
    reroute it with wide curves.
    If it is fine:
    check the funnel and buffer spring.
    Evidence to keep:
    photo of the tube route.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  4. Feeder funnel and buffer spring

    No special tools

    Who:
    you.
    How:
    check whether the feeder inlet funnel is badly worn and whether the buffer or hub spring is stuck.
    Result that matters:
    visible wear or a blocked spring.
    If there is wear:
    follow Bambu Lab's replacement guide.
    If all is fine:
    move on to the inside of the AMS.
    Evidence to keep:
    photos of the funnel.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

Still not solved

If the error persists, stop here. See what the technician must do and show you.

Where this code applies

A code is meaningful only inside the right product and version context.

Primary scope

System
3D printers
Brand
Bambu Lab
Product type
3D printer

Known code variants

  • 0700 0100 0002 0002
  • 0701-0100-0002-0002
  • Bambu Lab AMS assist motor overloaded
  • Bambu Lab AMS filamento enredado
  • HMS_0700-0100-0002-0002

What it means

Bambu Lab explains that the AMS hub motor helps feed filament to the printer and measures its resistance. If resistance stays too high and the filament moves too slowly, it raises the overload error, the filament returns to the AMS and the print pauses. The causes it lists are tangled or stuck filament, spools outside the AMS specification or made of cardboard, a worn feeder funnel, a broken roller support, a stuck buffer spring and worn or overbent PTFE tubes.

Warnings and stop conditions

  • Loweditorial warning

    Untangle the filament with the print paused and without forcing the PTFE tube. If filament is left inside the toolhead, do not pull it out with the nozzle hot: it burns.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

Symptoms and causes

Probable causes · in order

  • Tangled or stuck filamentCommon

    Filament that is tangled, or sags and gets stuck on the spool, drives up the resistance the AMS motor measures.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  • Spool out of specification or cardboardPossible

    Spools outside the AMS dimensions, deformed spools or cardboard spools turn with too much resistance.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  • Worn or overbent PTFE tubePossible

    A worn PTFE tube inside the AMS, or one bent too sharply between AMS and printer, increases filament friction.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

  • Funnel, rollers or buffer springPossible

    A badly worn feeder funnel, a broken roller support or a stuck buffer spring also hold back the filament.

    Evidence: Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

Virtual technician

Does 0700-0100-0002-0002 still appear after these checks?

Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.

Start diagnosis

Sources and technical references

  1. 1

    Bambu Lab Wiki: HMS Home Page, List of Error Codes for Bambu Lab 3D Printers

    Bambu Lab · 2026 · official_doc

  2. 2

    Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.

    Bambu Lab · 2025 · official_doc

Sources: Bambu Lab Wiki: HMS Home Page, List of Error Codes for Bambu Lab 3D Printers · Bambu Lab Wiki: HMS_0700-0100-0002-0002: The AMS assist motor is overloaded,The filament may be tangled or stuck.reviewed 2026-10-04 · verified

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