Prusa 3D Printer Error Code Crash Detected: How to Fix It

Q: What causes Prusa Crash Detected errors?

Crash Detected errors are typically caused by physical obstructions, clogged nozzles, belt issues, damaged linear bearings, or overly sensitive Stallguard settings detecting normal resistance as a collision.

Q: Can I disable Stallguard to prevent crash errors?

While Stallguard can be disabled, this is not recommended as it's a safety feature that prevents damage. Instead, adjust the sensitivity settings or address the underlying mechanical issues causing false triggers.

Q: How do I know if my Stallguard sensitivity is set correctly?

Proper Stallguard sensitivity allows normal printing without false crashes but still detects real obstructions. Start with default values and adjust down by 2-5 points if experiencing frequent false positives.

Q: Why does crash detection happen more often with certain filaments?

Some filaments create more resistance during extrusion or are more prone to clogging, which can trigger Stallguard. PETG and flexible filaments may require sensitivity adjustments compared to PLA.

Q: Should I replace parts if crash detection keeps happening?

Persistent crash errors may indicate worn linear bearings, damaged smooth rods, or stretched belts. Inspect these components and replace if showing signs of wear, damage, or excessive play.

Abstract

The Prusa Crash Detected error occurs when the printer's Stallguard system detects an unexpected collision or obstruction during movement. This safety feature prevents damage by stopping the print when the X or Y axis encounters resistance it shouldn't normally experience.