Replacing the Auto Focus Pin

Updated November 12, 2026

Applies to: MIRA 5, MIRA 7 and MIRA 9

How to replace a bent or sticking auto focus pin on a MIRA.

What you need

  • Cloth, to catch any screws
  • 2 mm Allen key
  • New auto focus pin

Replace the pin

  1. Place a cloth under the laser head, resting on the blades, to catch any piece that falls.

    Cloth under the laser head, resting on the blades
  2. Using a 2 mm Allen key, loosen the set screw on the auto focus assembly. Do not remove the screw.

    Set screw on the auto focus assembly
  3. Unscrew the auto focus pin and carefully remove it.

    Auto focus pin being unscrewed

    Do not let the red flag piece fall out of the auto focus assembly. If it does, put it back with its hole positioned inside the assembly.

    Red flag piece of the auto focus assembly
  4. Holding the red flag piece in place with one hand, screw in the new auto focus pin.

    New auto focus pin screwed into place
  5. Using the 2 mm Allen key, tighten the set screw on the auto focus assembly. Do not overtighten it: turn it slowly until it is snug, then back it off by a quarter turn.

    Tightening the set screw with a 2 mm Allen key
  6. Press the plunger up with your finger, to check that it moves smoothly up and down.

    Pressing the plunger up with a finger
  7. To confirm that the pin is seated correctly, power the machine on and check that the red light turns on.

    Red light on the auto focus sensor turned on

Need a hand?

Email support@aeonlaser.us or call 321-260-2325. More ways to reach us are on the Support page.

← Back to the Knowledge Base