Issues printing small parts  

RE: Issues printing small parts

Parameters of prusa slicer :

0.2mm, supports on base only

Usually my previous prints went successful

RE: Issues printing small parts

This looks to me as if the part only has a very small surface area with the rest being support structure. 
There are several thing you could do, assuming your first layer is already dialed in very well:

• Reduce the distance between support structure and object. This increases adhesion of the object to the support which seems to be too week in your case. But don't overdo it or you won't be able to remove the support anymore. 
• Use adhesive on the printbed. If you use Magigoo or something equivalent even that small surface area should be enough prevent detachment.
• Reduce printing speed, especially reduce speed of infill to the speed you use for perimeters. Sudden acceleration adds more stress and can increase the risk of breaking of delicate structures or detachment. 
• Add a brim, one that really touches the object (maybe you have to modify the support for that). From what I can see, support might not be necessary at all, rather add a brim without support. 

RE: Issues printing small parts

At a second thought. Is there a reason why you want to print those parts standing? If you turn them by 90°C to lie on their flat side, this should be a super easy print, unless I am missing some detail. Certainly the hole would print much nicer and bed adhesion shouldn't be a problem either. 

RE: Issues printing small parts

One other problem I see from that picture is that they are printed on overlapping support/raft.  You need to space them out more as printing filament from multipole models into the same space is going to cause problems.  Either set the spacing on the arrange function to be greater or if you really need them printing that close together merge them into a single object which will combine the support too.

All the previous suggestions are good.  The print orientation one is spot on and the brim with no support if they have to be printed upright (once merged or spaced apart more) would be my second choice.

RE: Issues printing small parts

Thanks a lot for all your answers

Indeed I will try to print them flat on the surface. That's a really good point

Thanks !

RE: Issues printing small parts

Looks like the bird houses for Wingspan. Print them lying down. No supports needed. 

RE: Issues printing small parts

I've tried lied down ; with another issue (maybe because of 0.3mm used for this test)

Also I've tried to print standing with more spacing. At some point it broke again.

I'm currently trying to print lying down the other side

Thanks for replies !

RE: Issues printing small parts

^^ Is this the top or the bottom side of the print, looking upwards?

I am not entirely sure, depending on what I see there, either the first layer calibration is seriously off (to far away from the bed), or you have serious underextrusion. maybe also both.

I would also not print 0.3 mm for small parts, just stay with 0.2 mm until that works flawlessly. Then you can try to move on to for example high layer hights.

RE: Issues printing small parts

Posted by: @thejiral

^^ Is this the top or the bottom side of the print, looking upwards?

I am not entirely sure, depending on what I see there, either the first layer calibration is seriously off (to far away from the bed), or you have serious underextrusion. maybe also both.

I would also not print 0.3 mm for small parts, just stay with 0.2 mm until that works flawlessly. Then you can try to move on to for example high layer hights.

 

I could not remember which side it was... I have to reprint it to be sure.

My last print on another side (better !) - still with 0.3

RE: Issues printing small parts

Looks better already but I would like to point out again that I wouldn't print at such high layer heights for small objects, also not for test prints. I would print at 0.1 mm.

The sides and overhangs look quite ok now but the top or bottom layer (whatever it is) is way off. You shouldn't see any such deep ridges on either of these layers. The infill is barely touching the perimeters. Have a look if that is only at the bottom layer like that or at the top layer as well. In the former case, tune life Z, if the latter is the case tune (ie increase) the extrusion factor for your filament.