Questions tagged [bed-leveling]

Use this tag for questions regarding the manual or automatic leveling of the build platform.

Bed leveling is the process of calibrating the level of the bed in relation to other axes (usually the z axis) of the printer. Do note that the term leveling is known as tramming. This is based on the principle of reference (the level of the bed is related to the plane or axis you level it to), and has nothing to do with bubble level.

The process of leveling can be either a manual or an automated process. The latter is frequently used with some sort of a sensor to sense the distance to the platform; such a process is referred to as Auto Bed Leveling (ABL). These sensors scan the build surface to compensate for local or global surface deficiencies.

See also

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How to set Z-probe boundary limits in firmware when using automatic bed leveling?

In setting up a probe for automatic bed leveling, the limits of the probing area must be entered in the firmware of a 3D printer. When using a sensor, how do you define the bed limits for the sensor in Marlin firmware? E.g. the Marlin (1.1.x)…
0scar
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Why is the center of my glass print bed lower than the corners?

I have a new Creality Ender 3. I suspect that I have not adjusted the eccentric nuts correctly, on the X-axis head carriage mounts. Even after a glass bed upgrade, using the Level Corners routine of the TH3D firmware, I can get the head to scrape…
SPJ
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How to set the Z home offset

I have what I thought would be a simple question. I don't have an auto leveling probe, I do my leveling manually with 4 screws and a piece of paper (I measured the thickness to 0.1 mm). For the longest time I would have trouble with the first layer,…
Matthew Goulart
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Using auto-bed leveling, do I need to initiate G29 before every print?

Various methods to scan the top surface exist to improve the bed adhesion to prevent prints to come loose from the bed during printing: e.g. BLTouch and clones or inductive and capacitive sensors/probes. In order, for the print head, to use this…
0scar
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How to increase the amount of probing points for a BLTouch sensor in Marlin firmware?

I have a new BLTouch that is setup (using Marlin 1.8.7) but I want to increase the probing grid from a 3x3 to something like a 5x5. I am using bilinear leveling with a 3x3 grid. How would I go about changing that?
Tanner D
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What exactly does automatic bed leveling do?

I get the concept of automatic bed leveling...the printer moves around the bed and uses a sensor to identify high and low spots, then "software compensates for differences". But what exactly does "compensates" mean? It is extruding more material…
Steve In CO
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BLTouch Probing Fails Intermittently

I just installed my (v3) BLTouch with a vanilla version of Marlin (1.1.9) on my Ender 3 and everything seems to work fine (including auto home) except the probing. It repeatedly does the first three probes (successfully) but then tries the fourth…
Blubberguy22
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Tevo Michelangelo nozzle below build plate?

I got a Tevo Michelangelo as first 3D printer today and already got a problem with the bed leveling: The extruder nozzle is way below the build plate. (When I auto-home the axes, which I've done several times). I thought to just adjust the plate…
some_user
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What is the difference between M420 S and M420 S1?

I have been reading through the Marlin website about ABL (Auto Bed Leveling) and I see what appears to be conflicting information. At https://marlinfw.org/docs/features/auto_bed_leveling.html it states that running G28 (Auto Home) will turn off ABL…
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Will a glass bed warp as it is heated?

I purchased a glass bed to use with my still-in-transit Ender 3. Since the bed came in before the printer, I pulled it out and used a flat edge ruler to see how flat the glass surface is. It appears the glass is slightly "dished" in the center from…
Steve In CO
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Z Offset on autoleveling sensor setup

How does Z offset (M851) work with an auto leveling sensor? Does it add the Z offset to the offset of the G29 mesh? or the G29 value replaces the M851? My printer is an Anet A8 with Marlin firmware, I was having issues with the autoleveling sensor…
Petar Petrov
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Marlin's bed leveling Mesh Validation Pattern ignoring home offset

I'm using a Prusa clone with Ramps 1.4, Marlin 1.1.5 and an inductive proximity sensor Z-probe. Due to the design of the printer, the X and Y end-stops and the Z-probe are not exactly aligned with the heated bed, so I must use Marlin's Home Offset…
Ian Mackinnon
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Ender 3 Pro has too much space between extruder and bed

I just finished assembling my Ender 3 Pro and am having trouble with bed leveling. The extruder doesn't even come close to the bed, the z-limit stops the nozzle about 3-4 mm away. The leveling springs are already pretty uncompressed. Is there any…
Brad K
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What options exist for augmenting the automatic bed-leveling?

When I print this file, one section smears. The print head is dragged through the soft filament. At first I thought my aluminum bed was warped, so I upgraded to a glass bed. Test prints were much better, but still had a section that smeared. My…
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Marlin 2.0 Firmware temperature jumping on LCD when trying to configure UBL

Flashed Marlin 2.0 on my Folgertech 2020 Prusa i3 variant. Calibrating seems to have gone smoothly until I tried to set up UBL. Saved the mesh into EEPROM with the M500 command after a G29 P1. When trying to do a test print with G26 P10, the…
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