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In productionProbeginnerSafety gating

E-STOP does not stop the robot

Make E-STOP win over the manual override so the robot always stops when it is engaged.

Pairs with Field cases: safety gating from a real AMR in Production ROS Operations. Read the concept first, then diagnose it here.

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Operator report

With the manual override engaged, pressing E-STOP no longer zeroes the commanded velocity.

Ubuntu 24.04, ROS 2 Jazzy, Cyclone DDS, containers, systemd, OpenTelemetry fleet sandbox

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01command→
  2. 02cmd_vel_gate→
  3. 03wheelsOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • E-STOP forces zero output, even with the override engaged
  • Commands pass through when E-STOP is clear
  • Hidden regression behavior
  • Root cause explanation