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Posted: 3/19/2024 8:01:52 PM EDT
[Last Edit: Tholo]
Any good tips for printing bridges?
Specifically, I'm trying to print gridfinity boxes with magnet pockets on the bottom. Prefer to use cheap pla, but I may test some of the good stuff. Essentially the roof drops and the magnet won't seat, or supports are a pain in the ass to remove. Some of the boxes might have 12 or more pockets.  Attached File |
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Posted: 3/19/2024 8:32:55 PM EDT
[Last Edit: Rat_Patrol]
[#1]
Are you talking overhangs or bridges? Just need to be sure.
ETA: These are overhangs of various values:  These are bridges: ETA 2: What size nozzle, and what machine are you using? |
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Posted: 3/19/2024 9:02:43 PM EDT
[#2]
Yeah, bridges.
Bambu X1C .6 nozzle Pockets for a 6 mm x 2 mm magnet |
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Posted: 3/19/2024 9:07:34 PM EDT
[Last Edit: Rat_Patrol]
[#3]
Three things for good bridging: cooling, temp, extrusion rate.
If you are printing at high temp for strength, you will suffer with bridges and stringing. If you are extruding too much on bridges, they sag. Not enough cooling, they sag. 0.6 will also have a slightly harder time bridging nicely, but should be plenty doable with pla and a short bridge. You will always get some droop, it is just going to happen without supports. Thicker glue can help with the magnets. |
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Posted: 3/19/2024 9:09:55 PM EDT
[#4]
I knew if I fired off a vague question with wrong terminology before walking the dogs, I'd have answers when I got home.
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Posted: 3/19/2024 10:32:03 PM EDT
[#5]
Originally Posted By Tholo: Any good tips for printing bridges? Specifically, I'm trying to print gridfinity boxes with magnet pockets on the bottom. Prefer to use cheap pla, but I may test some of the good stuff. Essentially the roof drops and the magnet won't seat, or supports are a pain in the ass to remove. Some of the boxes might have 12 or more pockets. https://www.ar15.com/media/mediaFiles/246073/gridfinity_bottom_jpg-3164014.JPG There are ways to design around this, but sounds like you are printing models from someone else. |
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Posted: 3/20/2024 12:09:29 AM EDT
[Last Edit: Tholo]
[#6]
yeah, its a configurable storage bin system.
I was poking around in Orca slicer and found Bridge Counterbore Holes. I don't know if this option was present in 1.9.1, but its in 2.0 Beta.  Attached FileIt adds a longer bridge over the counterbore.  Attached Fileas opposed to this  Attached FileI've got one printing now. Since I don't want to use the central hole, I could have used option 3: sacrificial layer:  Attached Fileit's just one layer thick, so you could easily crack through the hole if you did want to use it. Edit to add the result: flat bottom hole without post-process It's hard to focus on the bottom of the hole. Ignore the black line through the pic, you don't get my best mspaint this late on a school night.  Attached File |
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Posted: 3/20/2024 7:16:48 AM EDT
[#7]
That counterbore hole bridge setting is pretty slick!!
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