Scarf joint seams

[tsmith35]

With scarf joint seams now being beta tested in OrcaSlicer, there are many interested people who want to try out this feature.

This is just a place to discuss how to use scarf seam joints, the handful of settings that affect scarf seam joint quality and any issues found with this new and innovative seam type.

Here is the original discussion, for reference: Seam: use scarf joint to minimize seam visiblity

[psiberfunk]

Great idea. Thanks. I just updated the printables page w/ new builds and instructions to answer the most common questions here.

[vgdh]

It could be used with first layer also if it thick enough. With some start height in order to safe bed from scratching.

[Tawpie]

Bit of a mystery... build #1097 (MacOS 14.3.1 using the arm64 .dmg). Two simple objects, my intention was to try to isolate what sounded like dragging on the top of the model but when sliced, 5g of model is expected to take a bit over an hour to print. Turns out it's largely because the inner walls are bring printed desperately slowly. The left model is sliced with contour+hole, all around, 5 scarf steps. The right model is no scarf seams as a reference.

EXPECTED: inner walls print closer to 300 mm/sec (per speed settings and MVF)
ACTUAL: inner walls printing at an average 1.6 seconds/mm

This is the .3mf. Not sure if this is intentional, but it's surprising!
dragging-1097.3mf.zip

[khenderick]

Today I used scarf joints for the first time, and it's awesome, thanks a lot!

I noticed that the first layer's scarf joint looks a bit odd. It looks like the starting ramp is a bit too thin and/or has troubles properly sticking to the build plate. The end of the scarf looks good, and from the 2nd layer up it's just near perfect.

[T4psi]

I noticed this too. On my model, the scarf seam is not continous and every time a new seam line start, there is some underextrusion(?) or other odd phenomenom going on that layer. I've tried adjusting scarf joint speed, extrusion rate smoothing, scarf flow, scarft length and what else, but I could not remove this defect.

[T4psi]

After investigating the Printables page, I have to add that I was printing 300 mm/s inner wall and 200 mm/s outer wall. Now I see that this is a no-go.

[psiberfunk]

It’s possible with very well tuned settings , but you’re likely pushing your luck with this

[vgdh]

try start height 0.1 and seam gap = 0

[vgdh]

It would be truly great if our scarf settings could consider the percentage of overhang. Imagine, as we print a funnel, having the scarf applied on the inside where there's no overhang, while elegantly abstaining from application on the exterior.

[MadGoatHaz]

need arc incorporated... Can clearly see steps in the joint. very much enjoy using them however.

[darco415]

what the difference between contour and hole and contour?

[psiberfunk]

This is clearly described in the printables post . Please to read : https://www.printables.com/model/783313-better-seams-an-orca-slicer-guide-to-using-scarf-s

[theophile]

As far as I can tell the Printables post just says:

Use of Contour mode will give you scarf seams on the outermost wall only. Contour+Hole will include inside “hole” walls in the part. One mode vs the other may be desirable for different reasons. My settings use Contour+Hole by default.

I don't know what a "hole wall" is. I sliced a model in both Contour and Coutour+Hole mode and couldn't tell what was different between them. Can anyone elaborate?

[psiberfunk]

A “hole” is any interior perimeter that is not the outermost wall in a model . A typical example would be a screw hole , for example

[theophile]

Okay I think I get what you mean. I was reading "outermost wall" to mean the outer loop among the set of loops constituting a wall. And I was reading "Contour+Hole will include inside “hole” walls in the part" to mean that this setting will add something called a "hole wall" to the interior of the part somewhere. But I think what you're saying is that "Contour" will only use scarf joints on the exterior shell of the model whereas "Contour+Hole" will use scarf joints even on interior walls. That makes sense!

[psiberfunk]

correct. That's the right way to think about it. Once you play w/ a few models you can quickly see how it works.

[wanderlust-vlad]

Hi there!
I've tried the scarfseams feature in the 2.0.0 beta.
In my case some layer lines bump out of the model. It is even reflected in the slicer:

Scarf settings are default: 100% speed (60 mm/s in my case), 0 start height, 20 mm length, 10 steps. Have I done smth wrong?

[vgdh]

Try to use the whole perimeter scarf and start height 0.1

[psiberfunk]

Another possible cause of this is actually inner wall #/size changes @vgdh . My testing shows that classic mode can help with this sort of thing when arachne would cause such bumps.. but I only saw this effect strongly on overhangs where scarfs were already struggling.

Also, it looks like he isnt using recommended aligned seams.. I wonder what his results would be with the printables profile ?

[Goodwine]

I am trying this model out tardigrade, makerworld. I use it as a swatch and quick stringing test whenever I use a new filament. Using X1C, 6mm nozzle and calibrated filaments (flow dynamics and rate). My prints are getting holes in them, and I'm not sure what to configure to avoid that.

Attached below is a screenshot of the slice view, and photos of the results in (gold) PLA Silk and (blue) PLA. The issue is only apparent on PLA Silk, so I'm not sure if the settings are incorrect.

[Goodwine]

Scarf settings are the default for Contour

[skl111]

How do I use scarf Joint and have add more flow

ome underextrusion(?) or other odd phenomenom going on that layer. I've tried adjusting scarf joint speed, extrusion rate smoothing,

Where can you adjust the scarf joint flow, as that is causing under extrusion for me printing some cylindrical models as I can see in the slicer it slows the flow way down from 4 to .01m but I don't see a way co change it.
Using the latest main nightly build from 24-04-28 as o 1030EST. It has been and issue for a while and I finally tracked it down to what setting I was changed that introduced it.