Hi all, I’m preparing to print the v7 beta version. I’ve had issues in the past with broken actuators usually in the feet. I haven’t seen anything in the build instructions regarding the recommended number of walls/perimeters. Usually increasing these greatly improves strength however for the main body of course it needs to flex so there is going to be a tradeoff with motion? I’ve always just printed the main body with 2 perimeters.
Thanks
2 perimeters is standard (and I use 15% infill, which is the standard on my printer). More perimeters will not make anything too stiff, the flexing parts are thin so they are solid anyway.
The base of the internal actuator column is the place where more perimeters would help. Putting more perimeters everywhere would take a lot of time and filament with no benefit in most areas. If you are able to add modifiers in your slicer, a volume around the base of the actuator set to solid infill would improve the layer adhesion if you are really finding it to be a practical problem. If you inspect the bottom few mm of sliced layers in that area, you will see that there is a very small slot which is designed to enforce more perimeter in that one place. It helps, but solid infill would be even better.
This is the region that could benefit, but you need to be careful that the settings do not break the part into sections as there will be weakness when extrusions do not cross joins. Setting solid infill keeps the part continuous, setting regions with different numbers of perimeters does not leave a continuous outer perimeter (in Prusa Slicer at least)
Thanks as always for your fast and detailed reply @WilliamW that makes perfect sense, I didn’t consider the fact the flexure regions are already so thin therefore solid.
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