What the Er.630 alarm means

The motor was commanded to move but did not turn — rotor blocked — so current climbed to the limit with no motion. We have built up many handled cases of this INOVANCE IRCB500 / IRCB501 + SV660 servo alarm, and usually the first on-site inspection tells us what is wrong.

Most common causes

  • Robot physically jammed against a fixture or workpiece
  • Reducer or bearing seized
  • Brake permanently engaged
  • Motor cable open phase — two-phase running
Field note: Confirm or rule out the first cause first — it is the situation we encounter most.

Step-by-step field fix

  1. Release the jam mechanically and inspect for damage
  2. Check brake voltage and release action
  3. Test motor cable continuity on all three phases
  4. Backdrive the axis with power off to check the reducer
  5. Re-teach the path to keep clearance from the obstruction
Safety first: For INOVANCE er-630, this alarm family points at arm motion control: after a reset the arm can move unexpectedly, and anyone inside the working envelope is at strike and pinch risk. What you can check yourself first is Release the jam mechanically and inspect for damage; the arm working envelope handling is not a DIY job.

How we diagnose motion alarms on site

INOVANCE er-630 belongs to the motion & path family. On INOVANCE er-630 the failing stage is Inovance servos (SV660N class), same family as the robot controller on the Inovance robot controllers (IRCB series and kin) - the gap between command and execution: trajectory planning, joint limits, singularities, following error and mechanical resistance. We start reading INOVANCE er-630 at the pendant alarm screen (ER.xxx / 0x9xxx segments) and the servo panel Er code.

The chain involved in INOVANCE er-630 runs: program command -> trajectory planner -> joint targets -> servo execution -> actual position feedback -> deviation compare.

If Robot physically jammed against a fixture or workpiece on INOVANCE er-630 comes with a feeling of drag, the direction is clear: Following error that stays high on one axis only is usually rising mechanical resistance, not a weak servo. We turn the axis by hand with the brake released to feel smoothness, and listen to the reducer for once-per-revolution knocking - a single tick per turn on an RV reducer usually means internal bearing or cycloid damage. Grease that is black, dry or carries metal powder is the plainest evidence. Left alone, this graduates from a motion alarm to a scrapped reducer.

Field notes on this page cover INOVANCE er-630 (Motor Stall (Blocked Rotor)); written by the Henghuan repair team, updated 2026-10-01.

Can't clear it yourself? Contact us for remote diagnosis

Give us the alarm code, the robot model and what it was doing when the alarm hit. Our engineers run these diagnostics daily, and remote diagnosis by phone or video is free.

Get a Free Remote Diagnosis See Repair Services

Hotline: +86-20-39029800 · WhatsApp: +86-188-1886-2860

Related Motion & Path alarms

Er.234 — Runaway / Loss of Control
Same family: this code belongs to the Motion & path alarms family - the page collects all Motion & path-family codes we have handled, with the common inspection order and spares.
Other brands: we also keep field-fix libraries for EFORT · JAKA · AUBO and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the INOVANCE er-630 alarm mean?

The motor was commanded to move but did not turn — rotor blocked — so current climbed to the limit with no motion. We have built up many handled cases of this INOVANCE IRCB500 / IRCB501 + SV660 servo alarm, and usually the first on-site inspection tells us what is wrong. INOVANCE er-630 sits in the motion & path family; on our work orders the highest-frequency trigger for this code is "Robot physically jammed against a fixture or workpiece".

QCan I clear a INOVANCE er-630 alarm myself?

Whether INOVANCE er-630 clears on its own depends on the outcome of "Release the jam mechanically and inspect for damage". Finish the flow with "Re-teach the path to keep clearance from the obstruction" to confirm INOVANCE er-630 - do not skip it. If that step is clean, the second most frequent cause on INOVANCE er-630 is "Reducer or bearing seized". When INOVANCE er-630 keeps coming back it is not a one-off trigger - especially if Re-teach the path to keep clearance from the obstruction is where you get stuck. Do not keep producing through INOVANCE er-630.

QFor motion alarms like INOVANCE er-630, can you triage remotely first?

The commonest causes we see on INOVANCE er-630 are "Robot physically jammed against a fixture or workpiece, Reducer or bearing seized, Brake permanently engaged", so we stock the van against those. For INOVANCE er-630 specifically, we carry mechanical and configuration items: grease, limit switches, drag-chain segments, encoder cables and the parameter sheets for common reducers. For INOVANCE er-630, motion alarms can often be narrowed remotely first, so an on-site visit is not always immediate. Before we roll, tell us what INOVANCE er-630 shows on the pendant alarm screen (ER.xxx / 0x9xxx segments) and the servo panel Er code and what the machine was doing - phone or video triage is free.

The content on INOVANCE er-630 was written by Henghuan Robotics service engineers from hands-on repair experience. Alarm descriptions are our own reference summary and may differ by controller or software version — defer to INOVANCE documentation, or contact us to confirm. Henghuan is an independent service provider with no affiliation or endorsement by INOVANCE.