Flexible steel sheets

Updated 1 month ago ​by Tomáš Chvalina

The new MK52 Magnetic HeatBed holds removable steel sheets with the PEI surface. Those are great to easily remove the printed objects from the PEI surface. However, even these must be properly used, and that is what you can learn in this article.

Flexible steel sheets

Aligning the steel sheet on the heatbed

The MK52 heatbed has embedded high curie temperature magnets. These magnets are able to firmly hold removable spring steel sheets. There are two pins at the end of the heatbed that will align perfectly with cut out slots in the spring steel sheets. Make sure the bed is clean and there isn’t any debris on it before you put on the steel sheet

Align pins for the steel sheet on the heated bed
Never print directly on the heatbed.

    Flexible steel sheet surface preparation

    Currently, there is no difference between the Original i3 MK2/S PEI and the PEI on the removable steel sheet. So please visit PEI print surface preparation for information about preparation before printing and Increasing PEI adhesion if you want to know how to increase the adhesion.

    Removing printed objects 

    1. Await until the steel sheet cools down.
    2. Take it off and bend it inwards or outwards - depending on the size and quantity of printed object/s. 
    3. Do so until you can easily remove the printed object/s.
    4. For very thin models, you can still use a spatula.

    Bubbles underneath the PEI

    Over time you might see small bubbles underneath the PEI. That is nothing serious as it does not affect the print quality and it shall disappear over time. Here are 2 tips which will make the bubbles to disappear faster:

    1. Swap the side of the steel sheet you were printing on. This will speed up the "recovery" of the PEI surface. 
    2. Bubbles usually appear around the spot you print the most. So, try to print around the whole surface of the heated bed and not just at one spot.

    Do not hesitate to contact us at info@prusa3d.com if you would have any following questions.


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