How do you fix a 3D print from coming off the print bed?

Preventing a 3D print from coming off the print bed is crucial for a successful and accurate print. Here are some tips to help you with bed adhesion and prevent print failures:

Level the Bed:

Ensure that your print bed is properly levelled. A level bed provides a uniform surface for the first layer of the print.

Bed Surface Preparation:

Clean the Bed: Make sure the print bed is clean and free of any debris, oils, or residues. Use isopropyl alcohol to clean glass or BuildTak surfaces.

Apply Adhesive: Depending on your print surface, you might need to apply adhesives like glue sticks, hairspray, or speciality bed adhesives. Some materials adhere better with certain adhesives.

3DLAC spray adhesive is one of the perfect adhesion to FDM 3D printer print bed.

Use a Heated Bed:

A heated bed can significantly improve adhesion for certain materials like ABS and PETG. Set the bed temperature according to the material's recommendations.

Print Bed Temperature:

Adjust the print bed temperature based on the material being used. Refer to the material guidelines for recommended bed temperatures.

First Layer Settings:

Ensure the first layer is well-calibrated. The first layer should be squished onto the bed slightly without causing over-extrusion.

Printing Speed:

Reduce the initial layer printing speed. Slower speeds can help with better adhesion.

Raft or Brim:

Consider using a raft or brim for your prints. These structures can provide additional adhesion by increasing the surface area in contact with the bed.

Enclosure:

In some cases, enclosing the 3D printer can help maintain a stable temperature, especially for materials like ABS.

Check Nozzle Height:

Ensure that the nozzle is at the correct height above the bed. If it's too close, it can cause the filament to be squished, and if it's too far, it may not adhere properly.

Quality Filament:

Use high-quality filament. Cheaper or low-quality filaments may not adhere as well as premium ones.

Cooling Fan:

For certain materials, like PLA, it's essential to have the cooling fan off or, at a minimum, during the first layer to prevent rapid cooling and warping.

Monitor Print:

Keep an eye on the first few layers of the print. If it looks like the print is not adhering well, you may need to adjust settings on the fly.

By paying attention to these factors and adjusting your printer settings accordingly, you can improve bed adhesion and reduce the likelihood of prints coming off the bed prematurely.