This is now my second chair and I’m about done with printing them. I keep running into the same issues over and over and over again.
Issue number one.
The overhang on the rim pieces where the tire slides in continues to fail.
Printed as default from download file
Tried PLA as support with 0 interface layer
Tried shrinking the interface layer with just PETG
Tried every combination of slowisng down and adjusting temp.
My filament is at 17% humidity
Using Inland PETG+
Used Snapmaker U1, A1, A1 mini, P1S with same results.
Second issue
Anything I use PLA for support for PETG on, simply falls apart at the support layer.
How on earth do you remove supports from pieces that grove and slide together?
I am now down 3 full rolls of filament over 1.25 chairs and loosing my mind. I truly believe this is a great cause, but when I have to spend my hard earned money, I don’t want to put it in a recycling bin.
I may not be the MOST experienced printer, but I also am not new.
HI! fairly new to printing here. I had same issue with wheels. I have a Bambu P2s and had to not use the PETG HF profile, but just use the basic PETG profile and slow it down. I then had to use some glue on the plate in the support area only. I use the PETG for the supports and the print. I’m sure someone with better skills than I can advise but that is what worked for me finally.
Hmmm this is very confusing for me. I have a P2S and have been printing the wheel parts without any issues. Honestly not really had any issues with any of the parts.
With PETG I always get issues when the Aux fans are on, PETG doesn’t really like much cooling from fans. I actually change the setting on my H2D to have PETG print with a chamber temp of 40c.
What speeds do you guys use for your first layer? I use 30 for initial layer and 70 for initial infill. Now obviously what PETG you use can be a problem but I have used a variety for this project without many issues. My best luck has been with translucent PETG, I have had supports fall mid print and it still printed just fine with the remaining supports.
I missed your second question. I typically use a flat head screwdriver as a wedge between the support and the wheel wall (or other wall groves). I haven’t had an issue of it breaking the wall and typically breaks the interface nicely. Sometimes I need to break the support in half, slide out the first half, and then finish the second half.
I have a chisel that I use to smooth out any of the supported area for connections as well. Usually there isn’t much to do. I did implement the support settings I have found here and now they remove really easy, sometimes they even stay on the plate and I don’t have to do anything.
These were mine and they have worked great for several people.
As far as using PLA as an interface layer, if you don’t have multiple nozzles its not worth doing it. You have to purge 3 times normal amount switching between the 2 in the same nozzle. That is why your layers aren’t adhering, contamination.
I had similar issues to the wheel rim pic after I changed my nozzle. I learned two things.
First, I needed higher print temps. The new nozzle (tungsten carbide) didn’t conduct heat as well. I’m now up at 250c using Numakers. That stopped that little piece from getting knocked off the supports, but the piece printed on the supports still curled up, which scraped the nozzle and threatened to fail each print.
What finally solved it was using less support distance. I was using 0.3mm for ease of removal (supports just pop right off). But that turned out to be too far away for that supported area on the wheel. In my case, that needed to be a bit closer so the print would actually stick a little bit, around 0.2mm.
That solved it for me. Makes removing supports an enormous pain. But it worked.
Am I safe to assume these are what you’re using for all the pieces? Having an issue solely with the caster wheel prints curling above the support and will happily give these settings a go if so.
I print mostly with a .6 nozzle, but for the wheels that I do print with a .4 nozzle these are the settings that I use. When I did print an entire chair with a .4 these were the settings I used and it worked great. Give it a try and see what happens. Let us know if you have any more troubles!
