Suggestion to print this part

[soofle616]

With 1.5mm walls, you MIGHT get 2 shells but more likely you will get 1 shell and a single line of material between to make up the difference (.4mm nozzle - 1 shell = .8mm total width 1.5-.8=.7 .7 is "too small" for an additional shell. 1 shell and 100% fill in that area is likely your best bet.

Regardless of how you print it though, 1.5mm thickness is not much for an FDM part. It's just not going to be terribly strong unless it's short. I've managed 2mm walls that were actually quite sturdy but they were very short.

[userksh]

thanks, I´m really learning from you guys

[curious aardvark]

2mm walls are really strong.

1.5 is not bad, 1 just doesn't have much strength - but maybe more than you think.

But you have to do the maths :-)
One thing to bear in mind is that 0.1mm prints are NOT stronger than 0.2 or 0.3 mm prints.
For practical parts lower resolutions are better and quicker to print.

well one of the mistakes you've made is in copying an injection moulded design.

Those lines and reinforcements on the upper part of the flat bit. Aren't necessary for 3d printing. You could simply print that part flat and infill adds the strength as well as using less material.

Parts for injection moulding are always solid so they have to find ways to reduce volume of plastic and keep structural strength. Designing for 3d printing makes that a lot easier as you pretty much always use less material and an infilled part can be a lot stronger than a solid part.

The infill makerware uses is particularly strong. I've bounced up and down on parts with 10% infill and that's about 90kg on a small area.

Presumably you've simply copied an existing bracket/holder. Great model.

Things to look for in modifying parts for 3d print are sticky out areas you can add an incline to, so that they print without supports.
Without seeing the whole thing in place can't say what you could change. But there's usually something.