[OpenArm] CAN bus timeouts and recovery for builders integrators (intermediate)

What is your fastest recovery workflow when OpenArm joints stop responding after intermittent CAN timeout errors?

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OpenArm teams often hit intermittent CAN bus timeouts after a bringup change, a motor swap, or a long teleop session.

What is your fastest recovery workflow when joints stop responding but power and cabling still look normal?

Please share concrete steps: interface reset order, watchdog handling, bus-load checks, and how you confirm the arm is safe to re-enable.

If you reply, include one exact timeout symptom and one exact recovery step that reduced repeat failures.

Related troubleshooting path: Base Mount Moved And Calibration Reference No Longer Matches · Demonstration Timestamp Alignment For Teleop Datasets

Module: OpenArm · Audience: builders-integrators · Type: question

Tags: openarm, can-bus, timeout, recovery

Comment 1

The best replies usually name the first observable failure: missed heartbeat, stale joint state, driver exception, or one axis dropping off the bus.

Comment 2

We have seen teams recover faster when they standardize a reset order and log bus-load snapshots instead of guessing whether the issue was electrical or software-side.

Comment 3

If your lab has a safe re-enable checklist after recovery, post it. That is exactly the kind of reusable answer people search for later.

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Quick FAQ

What is the fastest intermediate diagnosis flow?

Reproduce "[OpenArm] CAN bus timeouts and recovery for builders integrators (intermediate)" in a controlled loop, then compare baseline vs current measurements before applying partial fixes.

python tools/reproduce_issue.py --case current_thread
python tools/validate_fix.py --checklist standard_intermediate
When should I stop patching and run full recovery?

If residuals or drift fail your acceptance limits after warmup, switch to full recalibration/recovery workflow.

Can I copy these commands as-is?

Use them as a checklist template first. Confirm interface names, fixture IDs, and safety conditions in your own cell before execution.