Resin Print sticks to fEP instead of build plate

Last Updated: September 4th, 2021

This is for prints that do not stick to the build plate at all - for prints that detach from the supports, check this resource.

If your print keeps sticking to the FEP instead of the build plate then do not fret, the vast majority of time this can be solved by making a few simple changes. Beyond the common suggestions of releveling the bed and adjusting the FEP, here are a few things for you to do:

  • Raise your base exposure time
  • Lower your lift speed
  • Lightly sand the build plate
  • Add a raft
  • Double check for defects

Raise your base exposure

Especially on non-monochrome printers, the base/bottom/initial exposure can be increased to allow the resin to properly bond with the build plate. You can find resin print settings for most printers here, and you can help grow the resource by joining our discord and verifying settings. As a warning, setting the exposure exceptionally high can leave indentions in the FEP.

Lower your lift speed

This, along with the base exposure, are the easiest changes in your attempt to resolve the issue. A high lift speed will increase the acceleration of the motor, thus increasing the force on the bond between the resin and build plate. Reduce the lift speed to a baseline such as 60 mm/min (1 mm/sec), then after successful prints you can optimize to a higher speed.

Lightly sand the build plate

Lightly sanding will create tiny grooves that allow the resin to better bond with the build plate. Using a grit of 200-400 is often suggested, but you can opt for higher grits (400+) if concerned about permanent damage.

Add a raft

Individual support bases may use very little resin, but they do not provide a lot of surface area to bond with the build plate, the bases can be difficult to remove from the plate, and they can often break or shatter into fragments when removing.

no raft support

Lights supports, especially on larger objects, provide very little surface area for bonding. However, on small delicate prints, using only light supports may prove sufficient.

raft support

Double check for defects

Check for build plate defects such as a warped bed. More common with initial runs, the budget printer companies have sent out build plates with gaps up to ≈0.5mm - such a gap will certainly cause issues. If this is your case then you have the options of sanding the plate down and asking the manufacturer for a replacement build plate. Keep in mind that such replacements may take weeks as they are often shipped overseas.

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