6
votes
Accepted
Getting a Cura Raft to stick to the object more firmly (for ABS)
You should reduce the air gap option called "Raft Air Gap". Printing ABS optimally requires an enclosure of the printer, wind and draft cause temperature changes which could lead to layer separation.
- 37.1k
5
votes
What exactly does automatic bed leveling do?
Basically there are two problems to address: first - bed inclination and second - uneven bed surface.
There are different algorithms dealing with one or both problems.
Most specialists insist that ...
- 574
5
votes
Setting up a brim/raft for only a portion of the overall print
In the newest version of Cura (4.5.0), in the per model settings, the only thing you can change for options set Build Plate Adhesion is ...
5
votes
Accepted
What exactly does automatic bed leveling do?
Last first: use of a raft has nothing to do with bed levelling. It depends only on the features/shape/etc of the object being printed.
Now, as to what the auto-levelling does: the answer is, sadly "...
- 3,051
4
votes
Accepted
Lines of PLA not sticking to the bed
You got a few things happening. First that temp seems low. I am printing PLA at 215.. but there are a lot of factors. Start with a simple calibration thin wall test. Which is just a wall, no body.
...
- 3,123
4
votes
What tweaks do slicers use to get rafts to stick?
You could experiment with the 'cleaning' part of the startup gcode shown here
...
- 3,842
4
votes
Accepted
Setting up a brim/raft for only a portion of the overall print
This is a "No" and "Yes" answer, it depends on the version of Cura you are using!
No, there are no options available to set the brim to some of the parts in Ultimaker Cura (at the ...
- 37.1k
4
votes
Accepted
Why did my print fall off its raft?
Your trouble lies within the presliced G-code: the temperatures are rather low for PLA and upping both by 10 degrees would be advisable:
200 °C for the Hotend
60 °C for the Bed
Atop that, printing a ...
- 22.5k
4
votes
What exactly does automatic bed leveling do?
A probe or even manual (e.g. through LCD panel) leveling results in either a reference plane or mesh. This depends on the firmware and the options set in the firmware. Basically, this process maps the ...
- 37.1k
3
votes
Why did my print fall off its raft?
It looks to me as the model did not have enough surface contact with the raft.
This can be caused by to big of a gap between raft and model set in the slicer or because of Underextrusion.
The part ...
- 131
3
votes
How should I go about printing easily removable rafts?
As comments suggest, a raft is not all that popular. Consider using a brim/skirt instead. I've had excellent luck with a 4-mm skirt, printing onto blue painter's tape. (Unless you consider it bad ...
- 3,051
2
votes
Accepted
Raft warping (Makerbot Replicator+)
I'm not sure I am reading your post correctly, but if you are doing a batch of small prints, I would recommend to space them enough so as each of them has its own mini-raft, rather than all of them ...
- 4,775
2
votes
Accepted
How should I go about printing easily removable rafts?
I have been able to get rafts that peel off by editing the g-code after the raft has finished and adding an M104 set temperature command telling my printer to cool the nozzle down to about 40 degrees ...
- 666
2
votes
What tweaks do slicers use to get rafts to stick?
While using rafts with PLA is a good idea due to warping, PETG is a material that requires very little build plate adhesion.
When I printed with PLA, I would normally use a two layer raft with a 0.3&...
2
votes
What tweaks do slicers use to get rafts to stick?
When I started work on mine, the bed leveling and radius (Delta-only issue) were horrid, and my erstwhile assistant was fond of using a LOT of glue stick, which sort-of made things work, though in ...
- 723
2
votes
Accepted
Ender 3 first layer of ESD PLA printing on raft fails
The gap between the raft and the first layer is too large (you need to switch to expert mode in Ultimaker Cura to see the values of the option before you can change them) and the hotend is too hot (...
- 37.1k
2
votes
Accepted
My Hatchbox PLA filament only allows me to use rafts
PLA is a forgiving filament, you can even print such filament without a heated bed. Although there are differences in quality between brands, PLA shouldn't need a raft to be printed. Hatchbox filament ...
- 37.1k
2
votes
My Hatchbox PLA filament only allows me to use rafts
It is unlikely this is a filament material issue since many of us have used Hatchbox PLA without this issue. This is a first layer adhesion issue.
Your bed may not be clean, or the bed may have had ...
- 2,376
2
votes
Why does a raft reduce / limit build volume?
The raft still needs to fit on the bed, and it counts as a print, because, it is printed. You want the raft for better adhesion, so that means that you need more contact with the bed. If you’re not, ...
- 85
2
votes
Accepted
Why raft is printed much better than the actual first layer?
Based on the scarring and the appearance of the printed holes, it looks as if the nozzle to bed distance is not good, it is probably too large (could be too close as well, if you consider the scarring ...
- 37.1k
2
votes
Lines of PLA not sticking to the bed
Do things in this order
1) Make sure your bed surface is appropriate. (PET tape, or elmers glue on glass. must be applied every 3 to 4 prints in used area)
2)Make sure extruder temperature is not ...
- 319
1
vote
Accepted
raft balling up
Thank you for all the suggestions.
My problem ended up being that the filament tube was loose (not screwed in all the way) into the extruder head. Eventually, the printer started giving me errors ...
- 121
1
vote
Why does a raft reduce / limit build volume?
Adjusted model Dimensions
The model has the size determined by the base area of the bounding box, in this case, $\pu{190 \times 200 mm }$. The raft as told by OP adds 15mm on all sides of the model, ...
- 22.5k
1
vote
When I print with a raft on my 3D printer, the raft will not peel off. What settings can I change to fix this?
I have heard that it is best to use a raft
Actually, it is not best to use a raft, a raft is an aid that can best be used in special cases, e.g. for filaments that shrink reasonably (PLA is not such ...
- 37.1k
1
vote
Accepted
Use raft pattern instead of wall
Cura, like many slicers, allows one to set the number of passes for top, bottom and sides. By setting these values to zero, your model becomes completely and only infill. The pattern selection for ...
- 12k
1
vote
Why does a raft adhere to the bed while skirt does not?
The raft base (initial layer) is usually printed with very wide lines. Cura's default is double the nozzle diameter, so 0.8 mm with standard 0.4 mm nozzle. This is ridiculously high flow, especially ...
1
vote
Sketchup designed object printing first layer incorrectly
A red surface coloring is normal for the bottom when viewed in Ultimaker Cura, nothing to worry about that (e.i. when that face is touching the build plate; if it is unsupported, you should add ...
- 37.1k
1
vote
Setting up a brim/raft for only a portion of the overall print
This post is quite old, but I describe how I solved this for anyone has the same problem I had: areas moved by the nozzle as the base of some appendices are too thin and tall.
In Cura 4.8 (I don't ...
- 11
1
vote
How should I go about printing easily removable rafts?
I use raft almost always for ABS and PLA. My favorite setting for gap is somewhere between 0.11-0.13 mm both for 0.1 and 0.2 mm layer height.
By using 3-4 layers of raft I always get predictably good ...
- 898
1
vote
Lines of PLA not sticking to the bed
In contrast to the other suggestions here, I would like you to try to slightly increase the distance from the bed.
The logic here is that the "thin walls" you are seeing during the first layer is is ...
- 4,022
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