I’ve had 2 failed prints on the truck so far and I’m asking if the design could be modified slightly?
In the picture the highlighted section is warping in the vertical plane, as the layers grow higher it has warped enough such that the layers are no longer printing on top of each other. The section where it is broken in the photo isn’t where it warped (that break happened afterwards) but on the topmost layer that section had warped in the direction of the arrows.
Its most likely warping due to uneven heat, but also because that section is so thin. My question is does that section really need to be so thin? The curved hollow seems to have no function (except aestheics?) but degrades the strength.
I have tried to edit the STL in meshmixer but the results aren’t great, would it be possible to get a modified truck and truck mirrored design with this section having a greater thickness?
What print settings are you using? There have been MANY of these parts successfully printed as designed so I don’t think it’s a design issue. But if you will share what settings you are using then we can help you figure out what might be causing the problems for you and help you get a successful print
I’m using PLA+ at 200/195degC with .2 layer height, 42% infill.
I’m sure there have been plenty of these printed, and maybe this is the first time this problem has been raised, however I’d still like to know if this section has to be that thin, is there any reason for it? If it was the same thickness as the rest of the section, ie remove the curved indent, it would be stronger and easier to print, and not really a big edit to the design?
from what I can see from the picture of the whole machine, the motor rests on top of this section, I can’t see any reason either for the curved inset or any effect that might arise from having it flat.
Also would someone be able to point me to the build instructions or step by step guide?
I believe it’s mainly clearance to install the M8 bearing bolt.
I filled mine in as well similar to what you did because my prints kept failing too. Filling it in just makes it a little more challenging to insert the bolt.
I used a socket extension so it did not impact tightening. You could print a mockup of that area only to see how difficult it would be for you and make a decision off that.
That’s part of why I tagged @vicious1 up above, I don’t see the build instructions page on the v1e pages.
There’s s build thread with a video timelapse here:
It’s as described above, to provide clearance for a socket to tighten bearing hardware. You may not have difficulties if you have u-joint sockets or suitable extensions.
It is possible to modify the part to suit your printer’s capabilities and I know other users have done so (as @Bigchepin notes as having done).
Usually the advice is to look more carefully at why your printer can’t print the part as if it cannot then it may mean you have print issues.
For example, layer adhesion or cooling problems that may mean all of your prints are compromised in a way that will produce poor results for you.
There isn’t a right or wrong here. If you can get it to print for you and still assemble a suitably working machine then all is well.
The other reason I tagged Ryan was that elements like this go into the brainstorming for ideas to improve future versions of the machine.
The only time I have had problems printing that part is with silk filaments, they contract too much, otherwise you need to look at your part cooling and possibly minimum layer times. That is a smallish island but in the grand scheme it is should not a tough print. There are smaller islands in other parts.
