hotponyshoes
Member
- Messages
- 6,412
- Location
- Somerset. Uk
I have been messing about with 3d printing, made a few lifesaving surgical bits , a few bits to keep the wife happy, replicated unobtainable parts to fix things etc.
Now I am getting in to making proper serious stuff. Like cup holders for my boat.
What's peoples views on infill % and how strong something comes out?
What sort of settings are you using for functional objects?
The default setting on mine is honeycomb infill at 10% I think. I mostly set it to 25% with 4 outer layers. I dont know why I do this.
I know if you were laying up carbon fibre and used a nomex honeycomb core you would end up with something stronger than solid carbon but the nomex is pretty strong in itself and makes a tough matrix once the resin is impregnated.
My gut instinct with printing is that 100% fill would be strongest as it's the same material used for the fill so you are just weakening it by removing some.
Also with laminated stuff you would choose layup direction etc. The only option I can see on the printer is in which way I orientated the model on the bed.
I have also seen a comment in another thread about choosing the amount of infill in areas where bolts/screws go through. How does that work?
Another question, has anybody tried printing the outer shell then filling it with something for extra strength? Like expanding foam, liquid resin etc.?
Now I am getting in to making proper serious stuff. Like cup holders for my boat.
What's peoples views on infill % and how strong something comes out?
What sort of settings are you using for functional objects?
The default setting on mine is honeycomb infill at 10% I think. I mostly set it to 25% with 4 outer layers. I dont know why I do this.
I know if you were laying up carbon fibre and used a nomex honeycomb core you would end up with something stronger than solid carbon but the nomex is pretty strong in itself and makes a tough matrix once the resin is impregnated.
My gut instinct with printing is that 100% fill would be strongest as it's the same material used for the fill so you are just weakening it by removing some.
Also with laminated stuff you would choose layup direction etc. The only option I can see on the printer is in which way I orientated the model on the bed.
I have also seen a comment in another thread about choosing the amount of infill in areas where bolts/screws go through. How does that work?
Another question, has anybody tried printing the outer shell then filling it with something for extra strength? Like expanding foam, liquid resin etc.?