Hi guys,
Glad the Mallard was made, I myself was looking to make a 3d print Goose, but carving the curves was annoying me ;)
Anyhow, first challenges I noticed, with the Nose stl (and other bits)
Arent solid bodies, so the models wall thickness results in problems like 2-3 walls when printed with a 0.4mm nozzle. I wanted either 1 wall (light model) or 2 walls side by side (stronger) but now I typically get 2 walls with a gap between when sliced (which results in a wavy outer skin when printed)
Too little bed adhesion surfaces. Even with Skirt/Brim its not ideal. I imported Nose into Fusion360 and added an inside bulkhead all the way around the open end, 4mm wide and 1.2 mm in depth. Helped bed adhesion, model strength and a good gluing surface between sections
I'm now looking at a 70% scale version (1m wingspan), at least this brings the 2 wall extrusion together for strength, but suspect the Servo spaces won't work anymore .... :(
Cheers,
Nathan
Thanks Jon.
...if you can share some photos of your print
Only printed the Nose, but can see the same results in the Slicer with the Fuselage STLs for example
... printed with two 0.4mm walls separated by about 0.4mm of infill .... I‘m not sure why you have ended up with 3 walls?
Yeh, thats the "3rd", the infill I see which I feel is a waste. I didn't printed the Infill, it extends the printing time a lot but doesnt result in much strength improvement. I'd prefer to see the 2 walls just side by side, fused together. With very thin walled models or BODY type STLs you & the Slicer can control that behavior, but can't really with a thicker Shelled body.
...bed adhesion, this comes down to your individual printer
Sure, but most cant work miracles 😆 I also add "Tabs" to my models, that are easy to snip off after printing.
...a 70% model, weight doesnt scale with wing area
With single wall and even with LWPLA, wouldnt be an issue I'd say.
...please share with me your printer and settings
Just a normal CR10, mirror bed & Simplify3d used for 100s of prints.
I'm tempted to open an RCGroups thread, but not sure if you were going to do that first, or you're waiting because its an early version release.
FYI, my technique, just one of many different I'm sure.
https://www.rcgroups.com/forums/showpost.php?p=42523133&postcount=106
Cheers,
Nathan
Hi Nathan, thank you for sharing your build with me, if you can share some
photos of your print along with your print settings please and I can help
triubleshoot your problems.
The model is designed to be printed with two 0.4mm walls separated by about 0.4mm of infill. With the infill set to around 3% it provides structural integrity and prevents the ‘wavy’ surface. If you really want to print the nose as a single walled piece, you can, print it in vase (surface mode) mode.
I‘m not sure why you have ended up with 3 walls?
In terms of bed adhesion, this comes down to your individual printer. It wouldn’t make sense to design in unnecessary strucutre to this end. My suggested fix for this would be to use a brim - in the brim settings you can increase the number of lines to make the brim bigger. You can also add brim inside the model too.
I wouldn’t recommend a 70% model, weight doesnt scale with wing area. as you say, none on the servo cutouts etc will fit, I would love to see how you get on though.
as I say though, I’m order for me to help you please share with me your printer and settings and some photos of your prints, on here, or to rc3dprint@icloud.com.