Door sensor calibration (CORE One) | Prusa Knowledge Base

The Prusa CORE One is an enclosed printer with a door. It is necessary for the door to be closed for printing.

The closed door improves the print quality, but also ensures your safety, concerning possible injuries from the moving components.

Procedure

To calibrate the door sensor position, navigate to LCD Menu -> Control -> Calibrations & Tests -> Door sensor calibration. An introductory message is shown on the screen, select Calibrate.

The printer prompts to first close the door. Once the door is closed, press Continue.

Then, the printer prompts to open the door, and gradually tighten the sensor tension screw. Tighten the tension bolt by half-turn for each iteration. After each adjustment, observe the door sensor switch emerging from the front profile hole.

Once tightened, press Continue. Follow the in-screen instructions, the printer can instruct to further tighten the tension screw, to loosen it, or to continue to a successive step.

When the printer prompts you, place your hand as shown in the screen picture below.

Only place the hand inside the door when the printer prompts you to do so!

Once the sensor is calibrated, you should hear an audible click from the door sensor area when regularly opening and closing the door.

After the calibration, the status can be checked in LCD Menu -> Info -> Sensor Info -> Door Sensor.

1 comment

Malkolmi

•

You need a 2,5 mm hex key to tighten it. Dont know why that is not in the info here. Mine came assembled but does not seem to work very good. It keeps telling me to tighten it. Does the door need to open a full 180? Because i tried that, but I have to move my printer around for that. Still only tells me to screw it tighter

OmikronTauri

•

Same issue for mine as well… any guidance on this Prusa?

Jan Kratochvíl

•

Hello. For help, please contact our support team as this is our primary way to help you.

jrbloom

•

Very poor that Prusa aren't monitoring these comments.

I had the same issue. It turned out that the sensor had been stuck too far forward, so that loosening the screw was not backing it into the printer.

I loosened the screw right back, and pushed/rotated the sensor backwards through the hole until it sat against the adjuster body (it is mounted by a screw that is left slightly loose, so it should be possible to move it).

Then I tightened the screw again until the sensor emerged through the hole. At that point the calibration went smoothly.