Sections
  1. §1 xArm 850 overview
  2. §2 Role in the Phase 1 production process
  3. §3 Major components
  4. §4 How the machine works
  5. §5 Key specifications and capabilities
  6. §6 Basic operating sequence
  7. §7 Safety requirements
  8. §8 Control, communication and programming interfaces
  9. §9 Limitations and open technical questions
  10. §10 Manuals, videos and other useful resources

Planned

  • Twin: a twin-ready view of the arm and its cell

Robot arm · UFACTORY

UFACTORY xArm 850

  • The UFACTORY 850, which UFACTORY also calls the xArm 850, is a robot arm with six rotary joints12.
  • At IntelliMake's Phase 1 factory it is station S2, where it picks up incoming material and moves it between receiving, staging and production34.

Start the beginner path Open the course

3D model © 2018 UFACTORY Inc., BSD 3-Clause. Licence text

Headline facts

  • 5 kg

    Rated maximum payload5

  • 850 mm

    Reach6

  • ±0.02 mm

    Stated repeatability7

  • 20 kg

    Arm weight, without its control box8

  • 1 m/s

    Top speed of the tool point9

The emergency stop

  • Pressing the control box's emergency stop makes the controller slow the arm in software, stop all activity and clear its cached commands; UFACTORY says arm power is removed within 300 ms10.
  • The arm does not hold perfectly still: UFACTORY says it will brake slightly and fall11.
  • The manual's own figures for this stop do not all agree12. Safety requirements teaches how to work around the arm.

What you can do with this item

  • Learn

    Free · 10 of 10 sections

    10 sections × 4 tiers, 132 practice questions and 88 cited sources.

    Open the course

  • Operate

    Jog the simulated arm and automate a task in a teaching scene. Simulation only: nothing on this site moves a real machine.

Choose your tier

Choose where to start. Every tier stays open to everyone; the choice only decides which panel you see first. What the four tiers mean

  1. 01

    Beginner

    For: Anyone with no robotics background: a visitor, a new operator, a manager

    What is this machine, what is it for, and how do I stay safe?

    Start here at Beginner

  2. 02

    Novice

    For: Someone who will work near or with the cell: operator, trainee technician

    How does it work, and how is it run day to day?

    Start here at Novice

  3. 03

    Intermediate

    For: Someone who will set up, program or maintain the arm: technician, student engineer

    How do I set it up, program it and recover it?

    Start here at Intermediate

  4. 04

    Expert

    For: Someone who designs, integrates or changes the cell: integrator, engineer, agent developer

    How do I choose interfaces, reason about cycle time, integrate it with the cell, and anticipate failures?

    Start here at Expert

Provenance

References · 12

Each number in the text points here. Every entry states its confidence class in words and keeps its evidence one click away. How to read the labels.

Key to the badges
Confidence: Verified
A manufacturer or IntelliMake document says so, the project owner stated it as the design, or it was observed directly. It does not mean anyone measured it at S2.
Confidence: Inferred
Reasoned from Verified facts. The reasoning is printed with the record.
Confidence: Assumed
Plausible but untested. The record says how it would be checked.
Kind: Gap
Not known. No figure or answer is given in its place.
Kind: Contradiction
Sources disagree. Both sides are shown, and the site does not pick one silently.
Kind: Recommendation
Project advice drawn from the records it cites. Not a fact about the machine and not a confidence class, so the filter never hides it.
Awaiting cell access
Awaiting cell access: could be confirmed or corrected once the physical S2 cell can be observed.
This project's simulation and agent design, not the physical cell
This project's simulation and agent design, not the physical cell.

  1. Confidence: Verifiedspec-088

    The record says

    UFACTORY itself uses the name 'xArm 850' for the 850: its V2.7.0 release note refers to 'xArm 850 arms' in the firmware changes and to 'xArm 850' in the UFACTORY Studio changes.

    Evidence · 2 citations

    Added compatibility for xArm XX1305-series and xArm 850 arms whose serial number has an "E" as the third character from the end.

    UFACTORY Release Note v2.7.0 · UFACTORY · v2.7.0, 'Firmware V2.7.0' list

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    for xArm 850, manual mode now uses its own equivalent-mass parameter (M).

    UFACTORY Release Note v2.7.0 · UFACTORY · v2.7.0, 'Studio V2.7.0' list

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  2. Confidence: Verifiedspec-001

    The record says

    The UFACTORY 850 has 6 degrees of freedom (six rotary joints).

    Evidence · 2 citations

    Degrees of freedom 6

    UFACTORY 850 product page · UFACTORY · Tech Specs > Comparison table, 'Degrees of freedom' row, UFactory 850 column (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Degrees of Freedom 6

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 2, 1.2 850 Specifications, p.174 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  3. Confidence: Verifiedint-003

    The record says

    Station S2 of the Phase 1 factory is the UFactory xArm 850 cobot.

    Evidence · 2 citations

    S2 UFactory xArm 850 Cobot

    IntelliMake Phase 1 Factory: Autonomous Production Demonstrator (infographic) · IntelliMake.org · S2 station label

    © IntelliMake.org. Used with permission; redrawn for this platform. · Cleared for use by its owner · retrieved 2026-09-21

    Project copy; not published on this site.

    UFactory xArm 850 | S2

    IntelliMake Phase 1 Factory: Autonomous Production Demonstrator (infographic) · IntelliMake.org · HW2 SME topic mapping table

    © IntelliMake.org. Used with permission; redrawn for this platform. · Cleared for use by its owner · retrieved 2026-09-21

    Project copy; not published on this site.

  4. Confidence: Verifiedint-004

    The record says

    S2 picks and transfers incoming material between receiving, staging and production.

    Evidence · 1 citation

    Picks and transfers incoming material between receiving, staging, and production.

    IntelliMake Phase 1 Factory: Autonomous Production Demonstrator (infographic) · IntelliMake.org · S2 station description

    © IntelliMake.org. Used with permission; redrawn for this platform. · Cleared for use by its owner · retrieved 2026-09-21

    Project copy; not published on this site.

  5. Confidence: Verifiedspec-002

    The record says

    The UFACTORY 850 has a rated maximum payload of 5 kg.

    Evidence · 3 citations

    Max Payload 5 kg

    UFACTORY 850 product page · UFACTORY · Products menu entry for the 850 (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Maximum Payload 5kg

    UFACTORY 850 Hardware Manual (online), 8. Technical Specifications · UFACTORY · Table 'UFACTORY 850', 'Maximum Payload' row (docs site 'UFACTORY 850 硬件手册', English version; names the machine 'UFACTORY 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Payload 5 kg

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 2, 1.2 850 Specifications, p.174 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  6. Confidence: Verifiedspec-003

    The record says

    The UFACTORY 850 has a reach of 850 mm.

    Evidence · 2 citations

    Reach 850 mm

    UFACTORY 850 product page · UFACTORY · Products menu entry for the 850 (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Maximum Reach 850mm

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 7, 1.11 Specifications, p.185 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  7. Confidence: Verifiedspec-004

    The record says

    The UFACTORY 850 has a stated repeatability of ±0.02 mm.

    Evidence · 3 citations

    Repeatability ±0.02 mm

    UFACTORY 850 product page · UFACTORY · Tech Specs > Comparison table, 'Repeatability' row (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Repeatability ±0.02mm

    UFACTORY 850 Hardware Manual (online), 8. Technical Specifications · UFACTORY · Table 'UFACTORY 850', 'Repeatability' row (docs site 'UFACTORY 850 硬件手册', English version; names the machine 'UFACTORY 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Repeatability ±0.02 mm

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 2, 1.1 850 Common Specifications, p.173 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  8. Confidence: Verifiedspec-005

    The record says

    The UFACTORY 850 robot arm (without control box) weighs 20 kg.

    Evidence · 3 citations

    Weight(robot arm only) 20 kg

    UFACTORY 850 product page · UFACTORY · Tech Specs > Comparison table, 'Weight(robot arm only)' row (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Robot Weight 20KG(body only)

    UFACTORY 850 Hardware Manual (online), 8. Technical Specifications · UFACTORY · Table 'UFACTORY 850', 'Robot Weight' row (docs site 'UFACTORY 850 硬件手册', English version; names the machine 'UFACTORY 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Weight(robotic arm only) 20 kg

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 2, 1.2 850 Specifications, p.174 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  9. Confidence: Verifiedspec-006

    The record says

    The maximum speed of the UFACTORY 850's end effector (TCP) is 1 m/s.

    Evidence · 3 citations

    Maximum Speed of End-Effector 1m/s

    UFACTORY 850 Hardware Manual (online), 8. Technical Specifications · UFACTORY · Table 'UFACTORY 850', 'Maximum Speed of End-Effector' row (docs site 'UFACTORY 850 硬件手册', English version; names the machine 'UFACTORY 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Max Speed of End-effector 1 m/s

    UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY · Appendix 2, 1.1 850 Common Specifications, p.173 (manual names the machine '850' / 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Maximum Speed 1 m/s

    UFACTORY 850 product page · UFACTORY · Tech Specs > Comparison table, 'Maximum Speed' row, UFactory 850 column (page names the machine 'UFACTORY 850'; spec tables say 'UFactory 850')

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  10. Confidence: Verifiedsafety-025

    The record says

    Pressing the control box's emergency stop makes the controller decelerate the arm in software, stop all activity and clear cached commands; UFACTORY says arm power is removed within 300 ms.

    Evidence · 1 citation

    Quote not shown (over 40 words). See the source at: 2.1.2 Emergency Stop Button.

    UFACTORY 850 Hardware Manual (online), 2. Hardware Installation · UFACTORY · 2.1.2 Emergency Stop Button

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  11. Confidence: Verifiedsafety-027

    The record says

    When the emergency stop is pressed, the 850 does not hold perfectly still: UFACTORY says it will brake slightly and fall.

    Evidence · 1 citation

    When an emergency occurs during the operation of the robotic arm, users need to press the emergency stop, and the posture of the robotic arm will slightly brake and fall.

    UFACTORY 850 Hardware Manual (online), 2. Hardware Installation · UFACTORY · 2.1.2 Emergency Stop Button

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

  12. Kind: Contradictionsafety-115

    Sources disagree

    The 850 manual's e-stop figures appear inconsistent. Section 2.1.2 says arm power is removed within 300 ms of pressing the e-stop. Section 7.8 says the e-stop is Stop Category 1, which decelerates 'with drive power on'. Section 7.9 gives Stop Category 1 stopping times of 521 to 885 ms. The UFACTORY sources do not explain how power removal within 300 ms fits a powered deceleration lasting up to 885 ms (the brakes may do the rest of the stopping, but no source says so).

    Related: safety-025 Verified safety-042 Verified safety-043 Verified safety-044 Verified safety-045 Verified safety-046 Verified safety-047 Verified safety-048 Verified comp-024 Verified comp-026 Verified

    Evidence · 6 citations

    the power supply for the robotic arm will be removed within 300ms.

    UFACTORY 850 Hardware Manual (online), 2. Hardware Installation · UFACTORY · 2.1.2 Emergency Stop Button

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Stop Category 1 and Stop Category 2 decelerates the robot with drive power on, which enables the robot to stop without deviating from its current path.

    UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY · 7.8 Stop Categories

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Emergency Stop Button of the Control Box Stop Category 1

    UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY · 7.8 Stop Categories, table

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Joint1 0.62 521

    UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY · 7.9 Stop Time and Stop Distance, table

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Joint2 1.12 885

    UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY · 7.9 Stop Time and Stop Distance, table

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

    Joint3 0.67 577

    UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY · 7.9 Stop Time and Stop Distance, table

    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21

    Open the source

Sources for this page

  • IntelliMake Phase 1 Factory: Autonomous Production Demonstrator (infographic) · IntelliMake.org (IntelliMake)
    © IntelliMake.org. Used with permission; redrawn for this platform. · Cleared for use by its owner · retrieved 2026-09-21 · cited by 2 records here · Project copy; not published on this site.
  • UFACTORY 850 Hardware Manual (online), 2. Hardware Installation · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 3 records here · Open the source
  • UFACTORY 850 Hardware Manual (online), 7. Production Information · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 1 record here · Open the source
  • UFACTORY 850 Hardware Manual (online), 8. Technical Specifications · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 4 records here · Open the source
  • UFACTORY 850 product page · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 6 records here · Open the source
  • UFACTORY 850 User Manual V2.3.0 (PDF, older edition) · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 6 records here · Open the source
  • UFACTORY Release Note v2.7.0 · UFACTORY (manufacturer)
    © UFACTORY · All rights reserved; quoted briefly as evidence · retrieved 2026-09-21 · cited by 1 record here · Open the source

IntelliMake diagrams are redrawn as native figures, © IntelliMake.org. UFACTORY does not endorse this platform.

All sources and attribution