# Peaks and Valleys in Bed Mesh **URL:** \ **Category:** General Discussion\ **Created:** [June 5, 2023, 11:53pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808 "2023-06-05T23:53:40Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![bmurphy1976](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/bmurphy1976/32/5741_2.png) [@bmurphy1976](https://klipper.discourse.group/u/bmurphy1976)\ **Post date:** [June 5, 2023, 11:53pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/1 "2023-06-05T23:53:40Z")
### Basic Information: Printer Model: Ender 3 S1 Pro MCU / Printerboard: STM32F401 I’ll happily provide the klippy.log of it’s needed but at the moment I don’t see much of value in it and it’s mostly filled with the raw probe offsets. ### Describe your issue: I’m struggling to get a good first level print with my Ender 3 S1 Pro. In particular I can’t seem to get rid of some z squish on the left side of my bed, even if I have a bed mesh enabled. I’ve worked really hard to dial in the z-axis and bed leveling, but I can’t get rid of these peaks and valleys in the mesh. Here’s what it looks like (with a 20x20 mesh to see what’s going on) which I find very suspicious. I just can’t seem to get rid of these long front to back valleys no matter how much I tweak things. ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/b/bb37a4a0937dbedfb1a003857545245895ffd274.jpeg) Could these be faulty regions? The bed IS a magnetic bed. What else could the problem be? ---
**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\ **Post date:** [June 6, 2023, 1:54am UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/2 "2023-06-06T01:54:02Z")
What type of Z axis sensor are you using? From what I’ve seen, the intervals between the poles of the magnet sheet are on the order of 2-3mm, not the 50mm or so you see here. ---
**Author:** ![jakep\_82](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@jakep\_82](https://klipper.discourse.group/u/jakep_82)\ **Post date:** [June 6, 2023, 4:55am UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/3 "2023-06-06T04:55:22Z")
This is pretty common on printers with v groove extrusion and wheel bearings. An out of round wheel will cause a regular wave pattern as shown here. ---
**Author:** ![bmurphy1976](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/bmurphy1976/32/5741_2.png) [@bmurphy1976](https://klipper.discourse.group/u/bmurphy1976)\ **Post date:** [June 7, 2023, 2:26pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/4 "2023-06-07T14:26:37Z")
It’s an Ender 3 S1 Pro so it has a BL touch sensor. Honestly it doesn’t seem that bad to me, just weird it’s so uniform however the bed mesh is not fully compensating. I get sections of under extrusion and over extrusion all over the first layer. @jakep_82 I’m new to 3D printing so I don’t fully grasp what you are saying. Do you mean the x axis wheels (or perhaps the bracket) may be causing this? I found another [thread](https://klipper.discourse.group/t/impossible-bed-mesh-leveling-cr10spro-v2/204/20) where all the comments are suspiciously similar to the issues I’m having. I’m going to spend some time working through that thread when I have a moment to see if anything in there helps. ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [June 7, 2023, 2:56pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/5 "2023-06-07T14:56:07Z")
> [@bmurphy1976](#): > > @jakep_82 I’m new to 3D printing so I don’t fully grasp what you are saying. Do you mean the x axis wheels (or perhaps the bracket) may be causing this? I understand it that way and it makes sense. I would check the wheels. You can probably feel it, when you move the extruder by hand in x direction. Conspicuous is the periodical pathway in x direction. Good luck, hcet14 ---
**Author:** ![YaaJ](https://avatars.discourse-cdn.com/v4/letter/y/7ba0ec/32.png) [@YaaJ](https://klipper.discourse.group/u/YaaJ)\ **Post date:** [June 7, 2023, 5:21pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/6 "2023-06-07T17:21:16Z")
Ordinary V roller : largest circumference = 75 mm, smallest : 61.4 mm If there’s a flat on a roller, the pattern should repeat itself every 60 to 75 mm ; eyeballing the map, the period is roughly 230 / 4 = 57.5 mm. Same order of magintude. Could also be a crappy roller (had a few that came with out of center Delrin wheels and/or crunchy bearings…). Also heard about rollers without spacer between the bearings inner races : bearing killer. And sometime chinese manufacturers can be cheap on lubricant… ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [June 7, 2023, 6:54pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/7 "2023-06-07T18:54:21Z")
> [@hcet14](#): > > I would check the wheels. You can probably feel it, when you move the extruder by hand in x direction. Conspicuous is the periodical pathway in x direction. > [@YaaJ](#): > > Ordinary V roller : largest circumference = 75 mm, smallest : 61.4 mm > > If there’s a flat on a roller, the pattern should repeat itself every 60 to 75 mm ; eyeballing the map, the period is roughly 230 / 4 = 57.5 mm. Same order of magintude. > > Could also be a crappy roller (had a few that came with out of center Delrin wheels and/or crunchy bearings…). Also heard about rollers without spacer between the bearings inner races : bearing killer. And sometime chinese manufacturers can be cheap on lubricant… @YaaJ ? Do you agree, checking the wheels on X? ---
**Author:** ![TGC](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@TGC](https://klipper.discourse.group/u/TGC)\ **Post date:** [June 7, 2023, 7:17pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/8 "2023-06-07T19:17:00Z")
I had the same pattern. Changing wheels helped. To check, you can make a mount for the wheel and dial indicator. The bl-touch cannot correct this because the curvature of the upper wheels is out of phase. The carriage X tilt oscillates and the z-offset changes as it moves. ---
**Author:** ![bmurphy1976](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/bmurphy1976/32/5741_2.png) [@bmurphy1976](https://klipper.discourse.group/u/bmurphy1976)\ **Post date:** [June 8, 2023, 3:21pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/9 "2023-06-08T15:21:07Z")
@TGC what wheels did you change to? ---
**Author:** ![TGC](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@TGC](https://klipper.discourse.group/u/TGC)\ **Post date:** [June 8, 2023, 8:09pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/10 "2023-06-08T20:09:57Z")
Transparent polycarbonate from aliexpress with a lot of reviews. Even cheap ones are better than stock egg-shaped. ---
**Author:** ![mykepredko](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/mykepredko/32/2085_2.png) [@mykepredko](https://klipper.discourse.group/u/mykepredko)\ **Post date:** [June 8, 2023, 8:34pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/11 "2023-06-08T20:34:55Z")
You might want to look at [OpenBuilds.com](http://OpenBuilds.com): > **[OpenBuilds](https://openbuildspartstore.com/delrin-wheels/)** > > Dream It - Build It - Share It with OpenBuilds A bit more, but generally very good quality. ---
**Author:** ![hcet14](https://avatars.discourse-cdn.com/v4/letter/h/ecd19e/32.png) [@hcet14](https://klipper.discourse.group/u/hcet14)\ **Post date:** [June 8, 2023, 9:12pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/12 "2023-06-08T21:12:06Z")
[https://www.aliexpress.com/item/32960635055.html?spm=a2g0o.order\_list.order\_list\_main.76.656a1802nd7OVT](https://www.aliexpress.com/item/32960635055.html?spm=a2g0o.order_list.order_list_main.76.656a1802nd7OVT) I’m very satisfied. ---
**Author:** ![janconstandse](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@janconstandse](https://klipper.discourse.group/u/janconstandse)\ **Post date:** [June 11, 2023, 8:09am UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/13 "2023-06-11T08:09:29Z")
I am using an Ender 5 Pro. When I didn’t use it for a while and i moved my carriage along the Y-axis i can feel an indentation in the wheels in the position the printer came to a standstill. So there is definitly an issue with the stock wheels. Maybe mine are put on there to tight, i don’t know. What i do to fix the indentation, rotate the individual wheel by hand. The position towards the other wheels changes and fixed it mostly. And i move the carriage by hand when not in use for longer period of time ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [May 10, 2024, 9:00pm UTC](https://klipper.discourse.group/t/peaks-and-valleys-in-bed-mesh/8808/14 "2024-05-10T21:00:06Z")