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Prusa MK3S/MINI/MK4/MK4KS PEI Sheet

Ref.: BASE-PEI-PRUSA-TEXT-MK

43.99 €

Tax excl.

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In stock 8 units available for immediate shipping.
units available for shipping in 5 - 9 days Available for shipment within 5 - 9 days

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Approximate delivery date: Monday 23 February

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The steel sheets with PEI surface are original Prusa consumables compatible with the 3D printers Prusa I3MK3S, Prusa Mini and Prusa MK4(S) and, in the case of the Smooth PEI sheet, also with the Core One and Core One+.

Both the Prusa I3MK3S and the Prusa Mini feature a magnetic heated bed that holds a steel sheet with PEI surface, improving adhesion between the bed and the printed part and preventing detachment during printing.

Two sheet types are available: Smooth PEI and Powder-Coated Textured PEI. Both are coated with Ultem PEI (polyetherimide). The difference is that the textured sheet has PEI powder baked directly onto the surface, while the smooth sheet consists of a PEI film bonded to the steel sheet. Both sheets can be used with any material provided they are used correctly. Different steel sheet colors are available; however, all versions have identical properties regardless of color.

The Prusa I3MK3S includes the Textured PEI sheet by default, while the Prusa Mini/MK4S includes the Smooth PEI sheet as standard.

Smooth PEI Sheet

This sheet is made of spring steel with double-sided smooth PEI coating. It is the best solution for printing PLA and provides strong adhesion with almost all materials. The bottom surface of 3D printed parts has a smooth finish. In addition to the MK series, it is also compatible with the CoreOne and CoreOne+.

Image 1: Smooth sheet

The color of the Smooth PEI sheet may differ from the product image (black, gold, green, etc.), but its properties are exactly the same regardless of color.

Textured PEI Sheet

The powder coating applied directly onto the metal makes this sheet highly resistant to damage. If the nozzle touches the sheet, the base itself does not wear; instead, only the upper powder coating (peaks) may be affected. This coating also gives a textured finish to the bottom surface of 3D printed parts in contact with the print bed. This version is NOT compatible with the Prusa3D CoreOne or CoreOne+. For these printers, the Core One Powder-Coated Textured Sheet is required.

Image 2: Textured sheet

General information
Manufacturer	Prusa3D
Compatibility	Base PEI Lisa Prusa i3 MK3S / Prusa Mini / Prusa MK4S / CoreOne /CoreOne+ \| Base PEI Texturizada Prusa i3 MK3S / Prusa Mini / Prusa MK4S

Dimensions and weight
Dimensions	Prusa i3 MK3S/MK4S: 250 x 210 mm / Prusa Mini: 180 x 180 mm

Other
HS Code	8477.9

General information

The following recommendations should be followed for the use of Prusa's PEI bases:

Before placing the steel base on the heat bed, make sure it is clean and free of filament residue.

Never print directly to the heated base of the Prusa printer. Always use the smooth or textured steel base.
Ignore the two holes in the steel base opposite the notch, only serve to facilitate the manufacture of it.
The use of the trowel should not be necessary, only necessary if the cold printed object cannot be decoupled from the printing surface by any bending of the base.
Because the bases are made of steel, they are prone to oxidation. Don't leave them for long in a humid environment.

In addition, in the case of the textured base, the following warnings should be taken into account.

Never clean the textured base with acetone and never apply ABS juice on it, as it causes the powder coating to crack and wear.
Do not cool the base in a refrigerator or freezer.

Possible problems

The following are the most common problems that may arise with PEI bases, as well as their possible solutions:

Bubbles under the PEI

With the passage of time, small bubbles may emerge below the PEI. It is nothing serious, as these bubbles usually do not affect the print quality and after a few days disappear. However, there are two tips that are effective at undoing those bubbles faster:

Change the side of the base on which it is printed. This accelerates the disappearance of bubbles.
Bubbles appear around where it is most printed (center of the base), most often below the corners of printed parts. When cutting models, place them on the entire print surface and not just at one point.

Bubbles at the base

Image 1: Bubbles at the base

Dent in the PEI

Sometimes when unpacking the smooth base there may be a small dent. Usually, simply flip the base and use the other side is enough to fix it. The warmth of the bed causes the dent to disappear on its own after a couple of days.

Dent at the base