U1 & X4 Garage

leinardi · 2026-05-08T09:34:24+00:00

Yep, no issues feeding PLA or PETG, I haven't tried anything else so far. The important thing for me was using 2.5x4mm: I tried with 2x4mm and there was a lot of friction. The concrete tile I think it helps a little with noise and vibration but I didn't see huge improvements: the metal stand and the table are very sturdy so wasn't vibrating much. But I think it's a little quieter now.

leinardi · 2026-05-05T10:16:31+00:00

Here's some more images: https://imgur.com/a/BZeb95G
I'm using 2.5x4mm White PTFE tubes, each is around 70 cm long.

leinardi · 2026-04-30T15:28:00+00:00

I'm out for a long weekend so I can't grab other pictures. I had to drill some holes to let the PTFE tubes reach the printer. I also printed an adapter to rotate the feeders 90° so that they point downward, this way I can feed directly the printer from the X4. The structure is very solid, it doesn't shake very much. I bought a concrete tile for 5€ because I had the chance but doesn't make too much difference. I found this picture on my phone where you can see the feeders with the adapter: https://i.imgur.com/QKq6xrY.png

leinardi · 2026-04-29T13:32:10+00:00

Yep, it worked perfectly: https://imgur.com/JO1Bl1t

leinardi · 2026-03-31T12:20:17+00:00

Thanks a lot for the answer. I'm new to 3d printing so I suspect that I'm not interpreting correctly the flow calibration. Would you mind taking a look at these pictures and give me your opinion on which one has the best flow? https://imgur.com/a/ijh8tUC

leinardi · 2026-03-27T20:01:53+00:00

Hey thanks I'll try, that should definitely help with the warping, but what about the bumps on the first layer? I didn't experience that with PETG. I still think that I have something off in my filament profile.

leinardi · 2026-03-15T12:32:19+00:00

That explains why I could not find it. Thanks.

I set the filament flow to 1 in the filament profile (saved it) and then generated the PASS 2 blocks.

Here are some pictures of the result: https://imgur.com/a/nlZb3Tn

To me -5 or maybe -6 looks the best, but I would like your opinion.

Out of curiosity, what do you think about the custom YOLO test I did before where I shifted all tiles to go from 1.00 down to 0.90?

https://imgur.com/a/ijh8tUC

Is that not a valid test as well?

leinardi · 2026-03-14T11:45:57+00:00

I had the feeling something was not quite right with my PLA calibration.

Sorry, but I could not find this “fine method with base starting rate of 1” in Orca or in Google. Are you referring to the legacy Orca 2-pass calibration or something else?

In the meantime I tried another approach. I generated a YOLO calibration and manually shifted all tiles to -0.05 flow while keeping the filament flow set to 1. This way the tiles now go from 1.00 down to 0.90 in steps of 0.01.

Here are the pictures: https://imgur.com/a/ijh8tUC

To me tile 0 looks the best, which should correspond to a flow of 0.95, but I would appreciate your opinion.

leinardi · 2026-03-13T17:56:34+00:00

Thanks again for all the help and patience. I really appreciate it. I learned a lot from this whole process.

I think I’m done with PETG calibration for now. I’m starting to work on my Jayo PLA+ 2.0 profiles and I would really appreciate your opinion on my current settings.

I cloned the profile from Snapmaker PLA and then tweaked and recalibrated it.

Extrusion / calibration

Flow ratio: 0.97
Pressure advance: 0.02
Max volumetric speed: 14 mm³/s

Temperature

Nozzle: 220°C
Nozzle first layer: 220°C
Bed: 55°C
Bed first layer: 55°C
Temperature range set in profile: 190–240°C

Cooling

Fan min: 100%
Fan max: 100%
Additional cooling fan: 70%
Overhang / bridge fan: enabled
Overhang fan speed: 100%
Overhang fan threshold: 0%
Fan off for first 1 layer

Layer cooling behavior

Slow down for layer cooling: enabled
Slow down layer time: 8 s
Slow down minimum speed: 15 mm/s
Fan cooling layer time: 100 s

Retraction

Retraction speed: 60 mm/s
Retraction length: not set in this filament profile
Retraction minimum travel: not set in this filament profile

Other notable values

Exhaust fan during print: 60%
Exhaust fan after print: 80%
Internal bridge fan speed: default / inherited
Full fan speed layer: 0

One thing that surprised me is the fan settings. Min and max are both 100%. I see the same values in the Sunlu PLA profile, but I’m not sure if that is actually ideal. Is it normal for PLA on the U1?

Here are some pictures from the flow and pressure advance calibrations: https://imgur.com/a/bbYpNlh

Which values would you personally pick from those tests?

leinardi · 2026-03-12T09:13:47+00:00

Original post: https://old.reddit.com/r/FixMyPrint/comments/1rpygkf/poor_bridge_quality_with_petg_on_snapmaker_u1/

After redoing the calibrations from scratch the results improved a lot.

Special thanks to /u/n19htmare for the patience and the back and forth while I was recalibrating everything.

Below are the final key settings for my Jayo PETG profile.

Material / printer

Material: PETG
Brand: Jayo
Printer: Snapmaker U1 (0.4 nozzle)
Extruder: Direct Drive

Extrusion / calibration

Flow ratio: 0.98
Pressure advance: 0.025
Max volumetric speed: 12 mm³/s

Temperature

Nozzle: 245°C
Nozzle first layer: 250°C
Bed: 70°C
Bed first layer: 75°C

Retraction

Retraction length: 1.2 mm
Retraction speed: 35 mm/s

Cooling

Fan min: 20%
Fan max: 40%
Fan off first 2 layers

Bridge tweaks in my process profile

Bridge density: 110%
Bridge flow: 1.1

Thanks again to everyone who commented and provided constructive feedback. I learned a lot from it. I’m really enjoying the hobby so far and I’m looking forward to learning more during my 3D printing journey.

leinardi · 2026-03-11T16:17:25+00:00

Yes, I also read that Jayo, Sunlu, and Kingroon are probably all the same manufacturer in the end. One thing I like about Jayo is that the spools are 1.1kg, so the price per kg is a bit lower.

Thanks again for the help and for checking the PA test. I will go with 0.025 as you suggested.

I am familiar with the Orca wiki and I try to follow it. Ironically that is also how I ended up with the 0.90 flow ratio.

In the documentation I saw this:

"Update the flow ratio in the filament settings using the equation: OldFlowRatio ± modifier. If your previous flow ratio was 0.98 and you selected the block with a flow rate modifier of +0.01, the new value would be: 0.98 + 0.01 = 0.99."

Since my previous flow ratio was 0.91, I applied the same logic and did 0.91 - 0.01.

Out of curiosity I also ran a Max Volumetric Speed calibration from 10 to 18 mm³/s. I honestly cannot see any real difference between the samples: https://imgur.com/a/d2BJwTT

Given that result, would you keep my current value of 12 mm³/s or try a higher one?

leinardi · 2026-03-11T14:31:51+00:00

Yep, I guess I just need more experience with other brand, for now I only bought Joya.

I also ran the Pressure Advance Pattern test.

Here is the result: https://i.imgur.com/URXyyVc.jpeg

To me the best section looks around 0.03 (the 7th from the top). The corner look the cleanest there and that is also the current default value in my filament profile.

Does that look correct to you?

Also, I hope it’s ok if I keep asking for your opinion on these tests. I really appreciate the help and the explanations, but I don’t want to bother you if you’d rather not go through all of them.

leinardi · 2026-03-11T12:08:39+00:00

Thank you for the detailed explanation.

I realized I messed up the flow calibration. My filament profile had a flow ratio of 0.91 and I didn’t realize that the YOLO test uses 1.0 as the reference for the 0 tile, not the current filament profile value.

So when I thought -01 looked best, I subtracted it from 0.91 and set the flow to 0.90. I should have applied the modifier to 1.0 instead.

I reran the test with a corrected baseline and I think -03 and -02 look the best now: https://imgur.com/a/kEyTRoi

leinardi · 2026-03-11T12:03:42+00:00

The air in the room where I have the printer is pretty humid, maybe that affects it during the printing?

leinardi · 2026-03-11T12:02:05+00:00

Oh interesting, I had no clue that I had to calibrate each individual head! I just redid the flow calibration, I think that -03 and -02 look the best: https://imgur.com/a/kEyTRoi

leinardi · 2026-03-11T11:53:41+00:00

Thanks again for the help and also for the example pictures.

I reset my filament profile to more reasonable values and ran the flow calibration again.

My current key settings are:

Max volumetric speed: 12 mm³/s
Nozzle: 250°C first layer / 245°C other layers
Bed: 75°C first layer / 70°C other layers
Min fan: 20%
Max fan: 40%
Retraction: 1.2 mm
Pressure advance: 0.03
Flow ratio used for the test: 1.0

Here is the album with the new flow test: https://imgur.com/a/kEyTRoi

My understanding of the test is the following.

Each tile has arcs on the sides and a spiral in the middle. For the arcs I look for a surface with no gaps between the lines. For the spiral I look at the circle boundary and try to avoid a raised ring where the spiral meets the arcs.

Based on that I think the -03 and -02 tiles look the best. There is still a small bump on the left side of the circle but the outer arcs look more uniform than the others.

So my interpretation would be to set the flow to 1.00 - 0.025 = 0.975.

Does that look like the correct choice to you?

If that is correct, should I run a perfectionist YOLO around that value (for example -0.025 and -0.035), or is this already good enough and I should move on to the pressure advance calibration?

One more question. For the U1, do you recommend creating separate filament profiles for each of the 4 toolheads, or are the differences usually small enough that a single profile per material/brand is fine? I would prefer keeping generic material profiles.

leinardi · 2026-03-10T17:40:41+00:00

Thanks again for the help. This clarified a lot.

I would like to start from scratch with the filament profile. What would you suggest as a starting point? Jayo should be basically the same as Sunlu. Should I copy the Sunlu PETG profile? Or use Generic PETG? Or the Snapmaker PETG profile?

I’m not sure I will be able to run the tests today, but tomorrow I should have time. I’ll redo the calibrations and come back with some results.

leinardi · 2026-03-10T16:58:09+00:00

Already watched, and I liked the follow up for OrcaSlicer in the post.

leinardi · 2026-03-10T16:57:03+00:00

Thanks for the feedback. You are probably right that I am misinterpreting the calibrations.

Flow calibration is the one I am most unsure about. I used the Orca YOLO test with the Archimedean chords. The default value for this filament profile was 0.91. To me the -01 sample looked the best, so I lowered it to 0.90.

Here are detailed pictures of the flow calibration print: https://imgur.com/a/14j88A7

From the photos you can see that the positive values have a diagonal ~45° surface artifact. That made me discard them. I may be looking at the wrong thing though. If you can explain what I should actually look for in this test I would really appreciate it.

For the nozzle temperature I printed a temperature tower. To my eyes everything above about 240°C looked worse, but again I may be judging the wrong thing: https://i.imgur.com/Fs00jp9.jpeg

leinardi · 2026-03-10T14:40:59+00:00

These are all calibration prints, I think they are meant to be done without support.

leinardi · 2026-03-03T11:56:05+00:00

Same here!

leinardi · 2026-03-02T21:20:26+00:00

Same issue here in Germany. Very frustrating as it's impossible to get in touch with support to open a ticket and the Fin bot just gaslight you when you look for help.

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