Causes and Solutions to 3D Printing Bed Adhesion Problems

The ability of 3D-printed plastic to "cling" to the build plate during printing is known as bed adhesion. Curled or shifted 3D prints—or worse—can occur when prints don't adhere to the build plate. Makers use a variety of surfaces for 3D printing to help various materials adhere to the plate.

Common materials used for building surfaces include glass, BuildTak, aluminum, stainless steel, and PEI film. To further enhance adhesion, you might also notice manufacturers utilizing masking tape, PET tape, or Kapton tape. However, not all filaments adhere well to the same type of bed. In order to increase your chances of achieving an ideal connection, let's talk about the key elements that impact bed adhesion. Keep reading!

The Importance of Bed Adhesion

A 3D print's success is highly dependent on the bed's adherence. When a print's first layer sticks firmly to the bed, it creates a stable base for subsequent layers. The base of a print determines its structural integrity, dimensional precision, and defect-free production.

Poor bed adhesion may cause several problems, including print warping, curling, or partially detaching from the bed. When prints don't stick properly, they fall off and can smash against the printer's nozzle or other parts. By learning what elements impact this process, you can significantly increase your 3D prints' success rate and decrease the likelihood of print failures caused by inadequate bed adhesion.

One of the most important things for 3D printing to turn out well is bed adhesion. Insufficient bed adhesion can cause problems such as warping, moving layers, or even failed prints. Luckily, there are a few things you can do to make your bed more adhesive so your prints won't come loose from the build surface; let’s go through them in detail.

 1. Clean the printer bed

For good adhesion, a clean print bed is required. As time passes, the build surface may become less sticky due to the accumulation of dust, oils from hands, or remaining filament residue. Clean the print bed with isopropyl alcohol (IPA) and a lint-free cloth before beginning printing. You might need a scraper for really tough residue. Particularly for PLA and PETG, this simple cleaning step is crucial for ensuring that the filament adheres to a clean surface.

Some pointers:

• To avoid the transfer of oils, refrain from touching the print bed with your hands after cleaning.
• Occasionally, you may want to give your glass beds a thorough scrub with some soapy water and then rinse them with IPA to remove any leftover residue.

2. Apply an Adhesive on the Bed

Bed adhesives can greatly improve adherence, particularly for difficult materials or prints with a tiny footprint. The most common types of adhesives used in 3D printing include glue sticks, hairspray, and specialist products like Magigoo. These ingredients make the surface sticky, which improves the filament's adherence in the first layers.

Some pointers:

• To prevent high areas, spread the glue evenly over the bed.
• When printing on different materials, it is essential to reapply adhesive for optimal results.
• Pick a glue that works with the type of filament you're working with; some are material-specialized.

3. Control the Bed's Temperature

The printout's adherence to the bed is highly dependent on temperature. A heated bed prevents the filament from cooling too rapidly, avoiding warping or separation by keeping it warm. The best bed temperature to use is filament type-dependent. In contrast to ABS, which may necessitate a bed temperature of 90–110°C, PLA usually adheres well at 60°C.

Some pointers:

• Raising the bed temperature a little bit should help with adhesion problems.
• Ensure that the initial layers adhere correctly and do not buckle by closely monitoring them.
• To keep the room at a constant temperature, you might want to think about putting an insulating material—like a cork sheet—under the bed.

4. Make Sure the Bed is Level

To achieve consistent adhesion throughout the print surface, a flat bed is essential. Poor adhesion can occur at different spots, as it causes the nozzle to be either too near or too distant from the bed. A manual leveling option is standard on most 3D printers, and some even include built-in sensors to ensure accuracy.

Some pointers:

• Make sure the nozzle is at the right distance from the bed by using a piece of paper or a feeler gauge.
• To check the bed level and stickiness, print a simple test object, such as a square with only one layer.
• Over time, temperature fluctuations or mechanical movement can cause beds to become misaligned, so it's a beneficial idea to check the bed level occasionally.

5. Use a Brim or Rraft

With your model, you can print brims and rafts to improve adherence. By adding an extra layer around the print's edge, or brim, the print's surface area comes into closer contact with the bed, which reduces the likelihood of warping. While printing a model directly onto a surface, a raft is a more substantial, multi-layer base. Both techniques shine when printing with materials that are prone to warping, such as ABS, or when the contact area is minimal.

Some pointers:

• Try a brim first if you're having adhesion troubles; it's less obtrusive and easier to remove than a raft.
• For prints of a greater size or when working with filaments that aren't easily adherent, a raft is a necessity.
• You can modify the number of raft or brim layers in your slicer program to suit your print's requirements.

6. Reduce the Printing Speed

The filament may not adhere correctly to the bed if laid down too rapidly during high-speed printing. To improve adhesion, let the filament bond with the build surface for longer by slowing down the print speed in the initial layers.

 Some pointers:

• Gradually raise the pace for consecutive layers after starting with a reduced speed (e.g., 20–30 mm/s) for the initial layer.
• To change the starting layer speed without changing the overall print speed, use your slicer software.
• Using slower speeds also enables more precise extrusion, which can enhance the initial layer's print quality.

7. Try Switching Bed Surfaces

Try using a different bed surface if the sticking issues continue. You can determine the ideal bed material for your filament by experimenting with several, as they all have different adhesion characteristics. Some popular choices are:

• Glass: If you mix glass with a bed adhesive, you can create a flat, easy-to-clean surface that is compatible with materials like PLA.
• BuildTak: BuildTak is a unique surface that, when used alone, provides superior adhesion to a variety of filaments.
• PEI Sheets: PEI Sheets are long-lasting and adaptable; they provide excellent material adhesion and work equally well with or without a heated bed.

Some pointers:

• Make sure the glass bed is level and well-fastened, as it is more likely to warp.
• For best adherence, replace BuildTak and PEI surfaces at regular intervals.
• Consider purchasing beds with detachable frames so you can easily clean them and remove prints.

8. Make Use of a Heated Box

Keeping the print at a constant, raised temperature throughout the entire object will greatly enhance adhesion, especially for difficult materials like nylon or ABS. The print stays warm in a heated chamber the entire time, preventing warping and ensuring even cooling.

Some pointers:

• Because not all printer models can manage a hot chamber, you'll want to check that yours can.
• Monitor the chamber temperature to ensure it remains consistent throughout.
• Heat can cause other problems, so be careful when working with materials that don't need to be in a heated chamber.

9. Add a Skirt to the Print

A skirt is another practical component that can enhance adherence. A skirt, printed around your item without touching it, is different from a brim. It aids in priming the extruder and may show possible adhesion or bed leveling problems before the main print begins.

Some pointers:

• The slicer's options allow you to change the distance between each skirt outline and the print, as well as the number of outlines.
• When printing with materials that tend to ooze, skirts come in handy since they clean the nozzle before the main print.

10. Check the Filter Diameter

Missetting your slicer settings can cause under- or over-extrusion, which affects adhesion. For precise extrusion, it is essential to configure your slicer to the appropriate value; most filaments have a diameter of either 1.75 mm or 2.85 mm.

Some pointers:

• To get the precise diameter of your filament, take a measurement using callipers and enter it into your slicer.
• Change the filament diameter setting to fix under-extrusion (initial layer gaps) or over-extrusion (filler filament squishing).

Best 3D Printing Software

There are many 3D printing software programs available that can prepare designs for 3D printing, and a good example is SelfCAD. It is an easy-to-use 3D design software that you can use not only to create 3D models but also to edit meshes and slice designs. It comes with interesting 3D modeling tools like freehand drawing and sketching that you can use to create designs from scratch. 

There are also selection modes as well as various modification tools to help you modify your designs based on your requirements. It also has an image-to-3D feature that makes it easier to turn photos to 3D models. You can also import STL files and modify them based on your needs. The software features a built-in online slicer that one can use to prepare designs for 3D printing. The video below shows how to slice STL files and generate the G-code to send to the 3D printer.

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Need to learn 3D modeling? Get started with interactive tutorials.