How to avoid print artifacts with very thin walls
I have a Core One on order (hasn't arrived yet), but before it arrives, I thought I would print an air exchanger on my old printer so I can start printing ABS, etc right off the bat (I live in Canada, so I can't justify simply venting to outside... A heat exchanger would make a lot of sense here...).
The concept is simple -- create a chamber with a lot of slots. Hot air travels outwards in the even number slots, and the cold air comes in from the outside on the odd numbered slots. Heat would be transferred between the slot walls. Needless to say thin slot walls would make it more efficient. But this is where I'm encountering issues. The problem is that the slicer (prusa slicer), seems to break up the slot walls when there's a bridge. And, for some reason it can sometimes leave a gap with the bridge causing, which renders the model useless. I've tried several settings, and I am not able to completely remove the gaps. Specifically, I set `Seam Gap Distance` to -100%, reduced the retraction length, and added an extrusion multiplier of 1.1. But I'm still getting the following:
The model itself is fine. I'm wondering if anyone could offer some sage advice on how I might get around this... -- either figure some way to slice it so the walls are continuous lines, or do some sort of setting to prevent it from leaving the gap in the first place.
RE:
I have a Core One on order (hasn't arrived yet), but before it arrives, I thought I would print an air exchanger on my old printer so I can start printing ABS, etc right off the bat (I live in Canada, so I can't justify simply venting to outside... A heat exchanger would make a lot of sense here...).
The concept is simple -- create a chamber with a lot of slots. Hot air travels outwards in the even number slots, and the cold air comes in from the outside on the odd numbered slots. Heat would be transferred between the slot walls. Needless to say thin slot walls would make it more efficient. But this is where I'm encountering issues. The problem is that the slicer (prusa slicer), seems to break up the slot walls when there's a bridge. And, for some reason it can sometimes leave a gap with the bridge causing, which renders the model useless. I've tried several settings, and I am not able to completely remove the gaps. Specifically, I set `Seam Gap Distance` to -100%, reduced the retraction length, and added an extrusion multiplier of 1.1. But I'm still getting the following:
The model itself is fine. I'm wondering if anyone could offer some sage advice on how I might get around this... -- either figure some way to slice it so the walls are continuous lines, or do some sort of setting to prevent it from leaving the gap in the first place. ehsaas program 2023
It sounds like you're tackling a well-thought-out solution for controlled ABS printing! For the slicer issue, have you tried increasing bridge flow ratio or adjusting perimeter overlap? Also, enabling ironing might help.
RE: How to avoid print artifacts with very thin walls
Being a fellow Canadian, and have an air to air heat exchanger in my workshop, I agree with your thought process but you have one issue. Plastic is a very poor heat transfer material and you won't gain much in the process. This is one reason that PEX is better for hot water than copper.
I would print the end pieces to hold thin sheets of metal. If you can find aluminium shim stock would be best. Bond the aluminium in the end pieces with silicone.