If the laser seems to be wobbling in the laser tube, check that the power is set to no lower than 20%. This happens when the laser is not fully fired under low power settings.

If the power setting is normal, but the beam is bent at the cathode (it looks like it is hitting the cathode pole from different angles), check how far the bent is from the cathode pole.

• If the bent is within 2 cm from the cathode pole, rest assured. This is normal.
• If the bent is more than 2 cm from the cathode pole, replace the laser tube with a new, identical one.

If the power setting is normal, but the engraving result is not as expected, troubleshoot as per  Weakened laser performance>>.