# Bad Surface **URL:** \ **Category:** U1 Toolchanger\ **Created:** [February 16, 2026, 9:36am UTC](https://forum.snapmaker.com/t/bad-surface/41247 "2026-02-16T09:36:43Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![tobi03](https://avatars.discourse-cdn.com/v4/letter/t/9d8465/32.png) [@tobi03](https://forum.snapmaker.com/u/tobi03)\ **Post date:** [February 16, 2026, 9:36am UTC](https://forum.snapmaker.com/t/bad-surface/41247/1 "2026-02-16T09:36:43Z")
![bad-print](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/6/6/66a78865b663598318d659558778ea52672f11d8.jpeg) Hi everyone, my U1 makes strange things and i dont have any idea to fix this. With Snapmaker PLA everything is fine, with Polymker PLA or Sunlu PLA i get this bad Print Quality. Played around with Temperature but nothing helps ---
**Author:** ![Boxkite](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@Boxkite](https://forum.snapmaker.com/u/Boxkite)\ **Post date:** [February 16, 2026, 11:12am UTC](https://forum.snapmaker.com/t/bad-surface/41247/2 "2026-02-16T11:12:27Z")
Which slicer? ---
**Author:** ![tobi03](https://avatars.discourse-cdn.com/v4/letter/t/9d8465/32.png) [@tobi03](https://forum.snapmaker.com/u/tobi03)\ **Post date:** [February 16, 2026, 11:23am UTC](https://forum.snapmaker.com/t/bad-surface/41247/3 "2026-02-16T11:23:30Z")
Snapmaker orca ---
**Author:** ![Boxkite](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@Boxkite](https://forum.snapmaker.com/u/Boxkite)\ **Post date:** [February 16, 2026, 11:51am UTC](https://forum.snapmaker.com/t/bad-surface/41247/4 "2026-02-16T11:51:51Z")
Which profiles did you use for each of those filaments? ---
**Author:** ![tobi03](https://avatars.discourse-cdn.com/v4/letter/t/9d8465/32.png) [@tobi03](https://forum.snapmaker.com/u/tobi03)\ **Post date:** [February 16, 2026, 12:03pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/5 "2026-02-16T12:03:57Z")
For snapmaker i use original profile, for polymaker i tried alao the generic, snapmaker and own profile. With all profiles same error ---
**Author:** ![Boxkite](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@Boxkite](https://forum.snapmaker.com/u/Boxkite)\ **Post date:** [February 16, 2026, 5:43pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/6 "2026-02-16T17:43:26Z")
And which profile foe the sunlu? ---
**Author:** ![tobi03](https://avatars.discourse-cdn.com/v4/letter/t/9d8465/32.png) [@tobi03](https://forum.snapmaker.com/u/tobi03)\ **Post date:** [February 16, 2026, 5:56pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/7 "2026-02-16T17:56:05Z")
For the sunlu i used generic pla, snapmaker pla and own profile with temperatures 225 and 60 degress ---
**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\ **Post date:** [February 16, 2026, 6:15pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/8 "2026-02-16T18:15:24Z")
Maybe more cooling or a higher layer helps, have a look in this thread: [Extruder nozzle grinding into prints - #87 by badprintsonly](https://forum.snapmaker.com/t/extruder-nozzle-grinding-into-prints/40760/87) ---
**Author:** ![Cylonmode](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/cylonmode/32/30291_2.png) [@Cylonmode](https://forum.snapmaker.com/u/Cylonmode)\ **Post date:** [February 16, 2026, 6:18pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/9 "2026-02-16T18:18:48Z")
Is the Sunlu and Polymaker filament older? Perhaps more moisture has creeped in? I hate automatically jumping to that conclusion but its a thought… ---
**Author:** ![tobi03](https://avatars.discourse-cdn.com/v4/letter/t/9d8465/32.png) [@tobi03](https://forum.snapmaker.com/u/tobi03)\ **Post date:** [February 16, 2026, 8:45pm UTC](https://forum.snapmaker.com/t/bad-surface/41247/10 "2026-02-16T20:45:04Z")
No all are new and fresh out of the seal. Have about 6 rolls from both and with all of them i have the error ---
**Author:** ![VItasG](https://avatars.discourse-cdn.com/v4/letter/v/d78d45/32.png) [@VItasG](https://forum.snapmaker.com/u/VItasG)\ **Post date:** [February 17, 2026, 4:14am UTC](https://forum.snapmaker.com/t/bad-surface/41247/11 "2026-02-17T04:14:15Z")
There is an issue with the material presets in Snapmaker Orca. You can adjust them manually. You can modify 1) flow ratio; 2) nozzle temperature, etc. Looking at the image, you can see that the print has bumps at the nozzle turning points, which is a sign of material buildup. You can try lowering the nozzle temperature and reducing the print speed to see if it helps.