So today I got another build surface to try out, a PrimaFil PEI Ultem sheet 0.5mm.
Installation went relatively easily (The Lokbuild surface was easier). The PEI sheet was mounted on a brand new Raise3D glass plate, so no cleaning needed.
The PEI Sheet tends to get air bubbles beneath, so I went quite slow when putting it on the plate. But still, I got some bubbles on two of the edges. No measures where taken to correct those. Because the glass plate is bigger then the actual build size on the Raise3D N2.
To get a build surface that covers the entire glass I was forced to order a 400x400mm PEI sheet and then trim two of the edges off making it fit the Raise3D plate with the dimensions 330.2 x 339.725mm. I wanted this plate to have the entire plate covered, because when needed it can be flipped and be used as a plane glass plate.
I am now trying it out with some test prints and they seems to stick quite well. I am running PETG at 220C now and the plate at 80C and it seems to stick just perfect. But it’s only an initial evaluation because I have only tested small prints yet.
Now when I have all my plates and build surfaces in place I will do a comparison of these surfaces with exactly the same settings. To see which one sticks best (later to come).
If the testing tonight are a success I will move on to print a big part for the Valify robot.
Update: all small tests went fine. Printing my first good looking PETG part. No more Stringing or Nozzle oozing.
Moving on to print the first part to the Valify robot failed again. After a few layers the part lifted from the bed in one corner and I aborted the print early in. didn’t want to waste anymore filament. So I began to investigate. I was running this print at 80C but the temperature on the bed and it was not near 80C. It was around 60C. So cold that I can hold my hand on it without any problems.
So I went on to increase the temperature to 100C to measure what I actually got on the Build surface.
Excuse my gauge, but that’s all I had at the moment.
So running 100C on the tune menu gave me roughly around 70C on the building surface. At that seems hot enough for the PETG to stick to surface. Maybe I increase the heat even more if the bad bed adhesion resurfaces.
After I have confirmed that an increase was needed I wanted to confirm the bed adhesion was working better, I went on to print a 4x100mm cylinder to test it.
The test past and the cylinder was sticking to surface throughout the print. It was still very easy to remove, so a bit higher temperature is maybe needed. I will think about it over the night 🙂 Tomorrow I will try to print out a Valify part again. I’m quite excited to see it come to life and not only in the virtual world.
About the PEI Ultem sheet:
PEI Ultem (Polyetherimide) from Prima Filaments is a reusable, relatively maintenance free, build surface for both ABS (with a Heated bed) and PLA (hot or cold), other materials such as Metal, Wood, PETG, ABS+ and many others also works just fine. You don’t require any additional adhesives such as glue or tape. PEI is appealing due to its “no-surface-prep” conditions, which make it convenient to work with. Additionally, printing on PEI requires no support rafts as parts adhere directly to the surface with no issue. Source: 3Dprima
You can buy this PEI Sheet here