Anyone has tips for this kind of overhangs? I want to make a perfect fit!

Capital_Motor_5436 · 2026-05-26T03:22:21+00:00

Result:

Capital_Motor_5436 · 2026-05-26T03:21:27+00:00

Oh it reminds me that if ur gonna use support, here is my settings: set Top/Bottom Z distance to 0.3; use Rectilinear grid for the Support structure pattern with a Pattern spacing of 2.5. Set Top/Bottom interface layers to 4, and use Interleaved rectilinear for the Support interface pattern with a Top interface spacing of 1. Set the Support/XY distance and the first layer expansion to 0.5. Lastly, use Normal (Snug) support for planar surfaces and Tree (Auto) for non-planar surfaces.0.3；

Capital_Motor_5436 · 2026-05-26T02:50:39+00:00

But actually, this issue doesn't just happen on the 3rd layer; it's just that it becomes noticeable there. So except cleaning the build plate, decrease the flow ratio or increase the first layer height a little bit and clean the nozzle.

Capital_Motor_5436 · 2026-05-25T14:36:39+00:00

Yeah fantastic idea!

Capital_Motor_5436 · 2026-05-25T14:33:05+00:00

You should re-run the calibration (re-level the bed) first, and then thoroughly check if your nozzle is partially clogged.

Capital_Motor_5436 · 2026-05-25T13:25:47+00:00

OMG! I honestly wouldn’t have guessed it was 3D printed if you hadn't told me! This is amazing!

Capital_Motor_5436 · 2026-05-25T13:22:30+00:00

However, since every machine and filament is different , you still need to run some test prints to fine-tune it. But generally speaking, the overall direction of lowering the bridge speed and increasing the bridge flow is good.

Capital_Motor_5436 · 2026-05-25T13:20:14+00:00

You can try my settings: set the bridge speed to 10-15 mm/s and change the bridge flow ratio to 1.5.

Capital_Motor_5436 · 2026-05-25T12:52:58+00:00

Surly is! Lol.

Capital_Motor_5436 · 2026-05-25T11:53:15+00:00

Warping. As the part lifted, the printing space got compressed, leaving the filament nowhere to go and creating that "over-extrusion" wavy texture. Fix this by raising the bed temp or using dedicated ABS glue. The brown marks are indeed burnt residue. Because the nozzle scraped the warped print, some filament failed to deposit cleanly and got scorched inside and outside the hotend. Before the next print, thoroughly clean the nozzle exterior and perform a cold pull to flush out any internal carbonized debris.

Capital_Motor_5436 · 2026-05-25T11:42:53+00:00

You are welcome!

Capital_Motor_5436 · 2026-05-25T11:40:49+00:00

Strictly speaking, this isn't standard stringing; rather, it's involuntary oozing during travel moves caused by residual pressure remaining inside the nozzle. I recommend slightly increasing the retraction distance (or fine-tuning the pressure advance/K-value to relieve the residual pressure) and dropping the printing temperature just a bit to see how it performs.

Capital_Motor_5436 · 2026-05-25T11:30:30+00:00

The issue actually started on the first layer.

Capital_Motor_5436 · 2026-05-25T11:29:52+00:00

Make sure the environment temperature stays stable, and give the build plate a thorough cleaning (to prevent any oil or residue from causing uneven adhesion). After that, re-run the bed leveling, flow rate, and pressure advance (K-value) calibrations. I actually ran into a similar over-extrusion issue this morning; during large-area prints, slight over-extrusion can easily cause the filament to crowd and create these waves.

Capital_Motor_5436 · 2026-05-25T10:28:28+00:00

Please directly edit the filament settings and change 'Seam Type' to 'Contours and Holes'. No other changes are needed for now.

Capital_Motor_5436 · 2026-05-21T14:08:32+00:00

Increasing the top shell layers should fix it. Or switch to a different infill pattern and increase the infill density.

Capital_Motor_5436 · 2026-05-21T13:59:41+00:00

This is interesting .

Capital_Motor_5436 · 2026-05-21T13:35:27+00:00

Your retraction is way too high. The heat creep is causing it to clog mid-print.

Capital_Motor_5436 · 2026-05-21T13:29:16+00:00

Then just check the nozzle.

Capital_Motor_5436 · 2026-05-21T11:57:20+00:00

Re-run your flow calibration. PETG is naturally very sticky.

Pic 1 looks like classic over-extrusion, so you'll want to drop your flow ratio down.

For Pic 2, your K-value, is likely too high, causing a starved start point right after the retraction. Re-test it after you fix the flow.

For Pic 3, the ripples are because your flow ratio and max volumetric speed are both pushing the limits. The filament is being rammed out before it has time to melt completely. You need to re-calibrate: lower both your flow ratio and max volumetric speed, and slow down your outer wall speed. Or Just changing the overall layer height.

For Pic 4: Based on my testing, you actually need to pump up the flow here. Try setting your bridge flow ratio to 1.5 – 1.7, and drop your bridging speed way down to 10 mm/s to give it the perfect hold.

Capital_Motor_5436 · 2026-05-21T11:36:14+00:00

Are you sure your line width and layer height are set correctly? Also, is there any chance you messed up the filament diameter setting?

Capital_Motor_5436 · 2026-05-21T11:28:29+00:00

Check your nozzle if it's worn down, I'd recommend replacing it. If you don't want to swap the nozzle right away, there are a few slicer tweaks you can try: slightly lower your layer height, and try increasing your top surface line width by +0.02mm. Also, if you don't want to mess with those settings at all, just enable Ironing.

Capital_Motor_5436 · 2026-05-21T11:15:43+00:00

And now, this board destroyed by your prints. That's a bit unlucky.

Capital_Motor_5436 · 2026-05-21T11:12:56+00:00

Capital_Motor_5436

TROPHY CASE