Design and/or Operational Errors

If certain conditions are met in the settings, design and workflow of the project the z axis could react unexpectedly. It's best not to enable Z Axis control in the software until you have a good grasp of the operations of this feature.

The bed, blade system, honeycomb, etc... is not seated correctly or is out of calibration

If the bed components are not placed or seated correctly, or if they are out of calibration or adjustment, this can cause a variety of issues and possibly a head crash.

The head was not in the correct position or too low

To utilize the auto-focus, the nozzle distance is determined by the stop ring around the lens tube. Here is how to re-calibrate this ring:

Auto focus was used with other heads besides the stock 2" head

The auto-focus system was primarily designed for the stock 2" head. The 4" head, for instance, is much longer and the focal gap is 10mm. It is recommended to only auto-focus with the stock 2" head and manually focus other optics arrangements.

Electro-mechanical Malfunction or External Force

There are rare instances where a system failure or other anomaly can cause a crash. For instance ,If you were using your longer 4" head and you had a brownout, when the systems cycle and come to ready the bed could move to a position that is safe for the stock lens but causes the 4" head to drag through the honeycomb while homing x,y, and z on start-up.

Here is how to recover if it does crash:

Manually Lowering the Honeycomb bed:

Perform this with the machine powered off and unplugged from the wall.

Manually move the Z axis belt by hand to lower the honeycomb out of the jam\bind with the laser head.