What the M# (-1007) alarm means

The maximum allowed torque for the indicated joint motor was applied for longer than the timeout period — the servo treats the joint as stalled and removes power. This is one of the most common faults in our repair logs for the Omron SmartController (ACE / Viper / Cobra) platform, and the first inspection typically locates the cause.

Most common causes

  • Joint physically obstructed (collision, snagged cable, fixture in the path)
  • Brake on the joint not releasing
  • Payload far above the configured value
  • Seized bearing or reducer
Field note: Field experience says the first cause is the most likely — verify it before moving on to the rest.

Step-by-step field fix

  1. Check for obstacles and confirm free movement of all joints by hand (with power off and brakes released safely)
  2. Verify the brake releases when high power is enabled
  3. Check payload configuration against the real tool
  4. Turn high power back on and repeat the failed motion at low speed
  5. If stalling returns with a free joint, test the motor and servo amplifier
Safety first: For OMRON m-1007, 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. On site you may look at after confirming power-off the first step yourself: Check for obstacles and confirm free movement of all joints by hand (with power off and brakes released safely). Beyond that it is the arm working envelope work - leave it to a professional.

How we diagnose motion alarms on site

OMRON m-1007 belongs to the motion & path family. On OMRON m-1007 the failing stage is integrated drive units (amplifier and supply in one housing) on the OMRON robot controllers (including SCARA and cobot companions) - the gap between command and execution: trajectory planning, joint limits, singularities, following error and mechanical resistance. We start reading OMRON m-1007 at controller status indicators and the software error list (letter prefixes RC / SW / V / M / D / A / E).

The chain involved in OMRON m-1007 runs: program command -> trajectory planner -> joint targets -> servo execution -> actual position feedback -> deviation compare.

If Joint physically obstructed (collision, snagged cable, fixture in the path) on OMRON m-1007 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 OMRON m-1007 (Motor Stalled (Joint N)); written by the Henghuan repair team, updated 2026-10-01.

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Related Motion & Path alarms

V# (-1027) — Hard Envelope Error (Joint N)
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 ESTUN · INOVANCE · EFORT and more — see the complete alarm code hub.

Frequently asked questions

QWhat does the OMRON m-1007 alarm mean?

The maximum allowed torque for the indicated joint motor was applied for longer than the timeout period — the servo treats the joint as stalled and removes power. This is one of the most common faults in our repair logs for the Omron SmartController (ACE / Viper / Cobra) platform, and the first inspection typically locates the cause. OMRON m-1007 sits in the motion & path family; on our work orders the highest-frequency trigger for this code is "Joint physically obstructed (collision, snagged cable, fixture in the path)".

QCan I clear a OMRON m-1007 alarm myself?

Whether OMRON m-1007 clears on its own depends on the outcome of "Check for obstacles and confirm free movement of all joints by hand (with power off and brakes released safely)". Finish the flow with "If stalling returns with a free joint, test the motor and servo amplifier" to confirm OMRON m-1007 - do not skip it. If that step is clean, the second most frequent cause on OMRON m-1007 is "Brake on the joint not releasing". After clearing OMRON m-1007, watch it for one shift. A second trip means stop and let an engineer arrive with the right test gear for the arm working envelope.

QFor motion alarms like OMRON m-1007, can you triage remotely first?

The commonest causes we see on OMRON m-1007 are "Joint physically obstructed (collision, snagged cable, fixture in the path), Brake on the joint not releasing, Payload far above the configured value", so we stock the van against those. For OMRON m-1007 specifically, we carry mechanical and configuration items: grease, limit switches, drag-chain segments, encoder cables and the parameter sheets for common reducers. For OMRON m-1007, motion alarms can often be narrowed remotely first, so an on-site visit is not always immediate. Before we roll, tell us what OMRON m-1007 shows on controller status indicators and the software error list (letter prefixes RC / SW / V / M / D / A / E) and what the machine was doing - phone or video triage is free.

This page on OMRON m-1007 was compiled from actual repair records of the Henghuan Robotics repair team. Alarm notes are our own summary for troubleshooting reference only and may vary with controller and software version — please consult Omron documentation or contact us if in doubt. Henghuan is an independent service provider, not affiliated with or endorsed by Omron.