When I try to print a large object on the bed, the back corner is having adhesion issues. It’s happening in the back left of the ams riser drawers with repeatability and on the back right on a multiboard that I keep trying to print. I’m using Bambu Studio for the slicer on a P1S. I’m using a smooth pei / high temp plate and PETG. I’ve dried the PETG multiple cycles before using it. I’ve slowed my first layers down, but otherwise I’m using the default .2 profile. I cleaned the bed with warm soapy water taking care to not touch it afterwards. I’m able to print anywhere else on the bed with no issue.
If I were to hazard a guess, I think you’re asking too much of the technology. Here’s what I mean.
The normal remedy for this kind of stiction issue is one or more of these three elements.
Brims
You can’t do that in this case because you’re printing right up the edge of the build plate. That area is notoriously colder than the rest of plate. Here’s a thermal image of my P1 with the factory plate. Note the huge temp difference(yellow) at the edge of the plate.
Glue
But you can’t use glue in your use-case because you have a pattern build plate for a reason. Glue would fill in the microscopic patterns that you paid money to have. Glue can also ruin the pattern on the plate.
elevated plated temps–think 80c for PLA.
The first thing I would do is to try a first layer test on this build plate and on a regular build plate. Make the layer the size of the same area you are printing on. Make it solid and 3 mm in depth or whatever depth your current shape causes you problems. Then run a test on each plate to see if you can reproduce it using that smaller model. Let me know if you need a detailed tutorial on how to do that.
Until you can recreate a test case that does this 100% of the time, it will be hard to diagnose.
Also, verify that you build plate is heating correctly with a non-contact IR thermometer. They can be had for between $8-$15 on Amazon. Make sure you get the pistol grip kind with the laser sight.
Thank you for the reply. I’ll add an IR thermometer to my diag tools. I have printed several 50x50x3 blocks in the problem area and they print successfully. I’m going to try with the textured pei plate after a good clean and printer calibration to see if that helps.
I switched to the textured pei plate, flipped the model 180 on the z axis and moved it slightly toward the front of the build plate. It came out perfect with no adhesion issues. It must have been a combination of the smooth plate and the location at the back of the bed that were the issue. Thanks for your reply.
Thanks for sharing your solution with the community. It always helps when folks let us know what worked. Your example shows that it’s often never a single issue or single solution that works but a combination.
It always helps when folks let us know what worked. Your example shows that it’s often never a single issue or single solution that works but a combination.