KUKA KSS00013 Collision Detection Error – Causes, Troubleshooting & How to Fix

Error Code Overview

• Error Code: KSS00013
• Category: Safety / Collision / Torque Monitoring
• Severity: High
• System: KRC Controller / KUKA Servo Drives (KSP/KPP)
• Impact: Robot stops motion to prevent collisions or mechanical damage

Quick Fix for KUKA KSS00013

If KUKA KSS00013 Collision Detection Error appears, follow these immediate steps:

1. Stop all robot motion immediately.
2. Inspect the robot path for collision or obstruction.
3. Check tooling and workpiece alignment.
4. Verify payload and tool data settings.
5. Reset the alarm in SmartHMI and test motion at low speed.

Tip: If no physical collision is found, the alarm may be caused by incorrect payload settings or abnormal torque feedback.

What Does KUKA KSS00013 Mean?

KUKA KSS00013 Collision Detection Error occurs when the controller detects abnormal resistance or torque during robot movement.

The collision monitoring system compares:

• Expected axis torque/load
• Actual servo load feedback
• Motion resistance during execution

If the measured force exceeds configured limits, the robot assumes a collision may have occurred and stops motion immediately.

In simple terms:

The robot detected more resistance than expected and stopped to prevent damage.

Common Causes of KUKA KSS00013

Physical Collision or Mechanical Interference

The most common cause is actual obstruction in the robot’s path.

Examples include:

• Tool hitting a fixture
• Workpiece positioned incorrectly
• Robot arm contacting nearby equipment

Incorrect Payload or Tool Data

Improper load configuration can create false collision detection.

Possible issues:

• Payload exceeds configured value
• Tool center of gravity incorrect
• Wrong tool/TCP selected in program

Aggressive Motion Parameters

Fast or abrupt movement may create excessive torque spikes.

Examples include:

• Excessive acceleration
• Sudden direction changes
• High-speed motion into tight path areas

Mechanical Resistance or Wear

Internal resistance may trigger abnormal torque readings.

Potential causes:

• Gearbox wear
• Bearing drag
• Joint stiffness
• Lack of lubrication

Servo Feedback or Drive Issues

Abnormal servo behavior can affect torque monitoring.

Possible faults:

• Encoder feedback instability
• Drive module irregularities
• Motor load reading errors

Recommended Components to Check

How to Troubleshoot KUKA KSS00013

Step 1 – Identify the Faulted axis

Use SmartHMI diagnostics to determine:

• Which axis triggered collision detection
• Torque/load values at trigger moment
• Motion segment where alarm occurred

Step 2 – Inspect for Physical Collision

Check the entire robot path for:

• Fixture interference
• Workpiece misplacement
• Tool collision
• Environmental obstruction

Step 3 – Verify Payload and Tool Data

Confirm:

• Payload weight matches actual load
• Center of gravity is correct
• Proper tool/TCP is selected

Step 4 – Review Motion Program

Inspect the robot program for:

• Excessive speed settings
• High acceleration commands
• Abrupt path transitions

Reduce motion parameters for testing.

Step 5 – Check Mechanical Condition

Inspect robot joints for:

• Stiffness
• Wear
• Binding
• Lubrication issues

Step 6 – Inspect Servo and Drive Status

Review KSP/KPP diagnostics and verify:

• No overload warnings
• Stable torque feedback
• Normal drive operation

Pro Diagnostic Tip

• Compare actual torque readings vs. commanded torque in SmartHMI.
• Use slow jogging to detect soft collisions or misalignment.
• Document repeated collisions to identify patterns or programming issues.
• Always check end-effector and tooling mounting for mechanical play.

👉 Most collision errors are caused by workspace interference, excessive payload, or sensor faults, not routine drive failure.

How to Fix KUKA KSS00013

Dependingon root cause, repair may include:

• Removing physical obstructions
• Correcting payload/tool settings
• Reducing speed and acceleration
• Repairing worn mechanical joints
• Replacing faulty servo/feedback components

How to Prevent KUKA KSS00013

To reduce future collision alarms:

• Keep robot work envelope clear
• Verify payload after tooling changes
• Avoid aggressive motion tuning
• Inspect joints and gearboxes regularly
• Validate programs before production use

Related Errors

• KUKA KSS00010 Workspace Limit Error– axis exceeded defined workspace.
• KUKA KSS00012 Path Deviation Error– axis not following programmed path.
• KUKA KSS00009 Limit Switch Error– Safety boundary detection.
• KUKA KSS00406 Position Deviation Error– axis deviation from commanded trajectory.
• KUKA KSS00407 Following Error– Servo cannot follow motion commands.

⚠️ Closely linked to collision prevention, axis motion control, and torque monitoring.

FAQ About KUKA KSS00013

Can the robot move after KUKA KSS00013?

No. Motion is stopped until the collision condition is cleared and the alarm is reset.

Why does KUKA KSS00013 happen without visible collision?

Possible causes include:

• Incorrect payload settings
• Torque spikes from aggressive motion
• Mechanical resistance
• Servo feedback instability

How do I fix KUKA KSS00013 quickly?

1. Inspect for obstruction
2. Verify payload/tool data
3. Reduce motion speed
4. Test robot at low speed

Can excessive payload trigger KUKA KSS00013?

Yes. Overloading or incorrect payload data can trigger false collision detection.