Large thin-walled print becomes badly warped, possible fixes?
Posted by HugoW
|
Large thin-walled print becomes badly warped, possible fixes? January 02, 2018 06:27AM |
Hi,
I am working on an RC truck project and yesterday I printed the hood of the truck. Or I tried. The part is 270 mm wide (y direction on the bed) about 140 mm high (x direction on the bed) and 150 mm long (z direction on the bed). The walls are 1mm thick. When it prints, it only prints two 0.4 mm wide walls parallel, no infill. The result is ugly. Print pics:
And the print was not finished. It flexed too much and couldn’t print nicely anymore about 125 mm into the print (z direction). I have printed 2 mm walls successfully, it then prints 2 layers width outer walls and inner walls, so together 1.6 mm wide, and hardly any infill in the 0.4 mm gap. But those surfaces were not so large, only 200 (x or y) x 50 (z) mm or so. The easiest fix would be thicker walls, I know. But is there a way to make this work with other settings? I am considering to try 1.2 mm thick walls and 100% infill, effectively printing three layers wide. Or 0.8 mm wide, with the two walls touching so it is more strong / stable. Or is the temperature or speed at fault, I am printing this in PLA at 200° C at 50 mm/s.
Any advice is welcome,
Cheers,
Hugo
I am working on an RC truck project and yesterday I printed the hood of the truck. Or I tried. The part is 270 mm wide (y direction on the bed) about 140 mm high (x direction on the bed) and 150 mm long (z direction on the bed). The walls are 1mm thick. When it prints, it only prints two 0.4 mm wide walls parallel, no infill. The result is ugly. Print pics:
And the print was not finished. It flexed too much and couldn’t print nicely anymore about 125 mm into the print (z direction). I have printed 2 mm walls successfully, it then prints 2 layers width outer walls and inner walls, so together 1.6 mm wide, and hardly any infill in the 0.4 mm gap. But those surfaces were not so large, only 200 (x or y) x 50 (z) mm or so. The easiest fix would be thicker walls, I know. But is there a way to make this work with other settings? I am considering to try 1.2 mm thick walls and 100% infill, effectively printing three layers wide. Or 0.8 mm wide, with the two walls touching so it is more strong / stable. Or is the temperature or speed at fault, I am printing this in PLA at 200° C at 50 mm/s.
Any advice is welcome,
Cheers,
Hugo
|
Re: Large thin-walled print becomes badly warped, possible fixes? January 03, 2018 03:43PM |
Thanks. Zooming in on the layers view in Cura (I just figured out I could zoom in), I can actually see it prints two walls that don't touch. And that is indeed what it does, not only in the simulation:
So I need to make the drawing such that the walls are 1.2 or 1.6 width. I can do that. Maybe even overextrude a little bit to make the walls glue together better. And I made a make-shift product cooler tonight:
It seems a bit weird to cool the hotend this way, too, a bit, but it is a constant cooling so the hot-end should cope. Although I am looking into some form of insulation, cann't be bad to shield the hotend from external influences. By the way, the nose of the cooler is 0.8 mm wide wall, it indeed prints two layers that touch. They cohere nicely and the part seems quite strong.
Cheers,
Hugo
So I need to make the drawing such that the walls are 1.2 or 1.6 width. I can do that. Maybe even overextrude a little bit to make the walls glue together better. And I made a make-shift product cooler tonight:
It seems a bit weird to cool the hotend this way, too, a bit, but it is a constant cooling so the hot-end should cope. Although I am looking into some form of insulation, cann't be bad to shield the hotend from external influences. By the way, the nose of the cooler is 0.8 mm wide wall, it indeed prints two layers that touch. They cohere nicely and the part seems quite strong.
Cheers,
Hugo
Sorry, only registered users may post in this forum.