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

There are a few questions on this topic, so a more generic solution would be informative and will prevent multiple questions of others when their sensor has a slightly different location. This answer ...
0scar's user avatar
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12 votes
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Z Offset on autoleveling sensor setup

G28 instructs the printer to home itself to the X an Y endstops and the Z sensor determines the homing of the Z axis; i.e. when the sensor triggers, this is not ...
0scar's user avatar
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12 votes

How to increase the amount of probing points for a BLTouch sensor in Marlin firmware?

You need to change the constant value(s) in your Configuration.h file of your Marlin version from: // Set the number of grid points per dimension. #define GRID_MAX_POINTS_X 3 #define ...
0scar's user avatar
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10 votes
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Using auto-bed leveling, do I need to initiate G29 before every print?

No, it is not necessary to call G29 before every print to "auto level the bed" 1) provided that: the bed surface has not changed (e.g. large load or ...
0scar's user avatar
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9 votes
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What is the difference between M420 S and M420 S1?

TL;DR Short answer: "There is no difference!". Long answer G-code is parsed line by line. The parser in the firmware reads the command and the options (also called parameters) following it, ...
0scar's user avatar
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8 votes

Will a glass bed warp as it is heated?

TL;DR Yes, glass warps when hot. Use a physical touch sensor and calibrate it out, or swap glass if it's "bad". The further you go into mechanical studies like 3d printing, mills, and ...
joshConway's user avatar
8 votes
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Does auto leveling result in sheared prints?

Using automatic bed leveling assists you in getting the print to stick better to the build platform as a result of the print head following the non-uniform geometry or tilt of the build plate. In, e.g....
0scar's user avatar
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8 votes
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How to set the Z home offset

It is preferred to get the distance correct by hardware changes (leveling screws). But it is possible to do it with software. You can not only change the Z offset in the slicer or in the configuration ...
0scar's user avatar
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8 votes

Z-offset: 0.2 mm, 0.1 mm or the thickness of paper?

They are all generic guidelines. Don't count on them too much. What you need is a reproducible offset to get the same value everywhere in the bed, then you can correct the overall offset via gcode at ...
FarO's user avatar
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7 votes

Nozzle jumps off the bed when using Marlin Mesh Bed Leveling

None of the answers address your question to solve it! The only sensible contribution comes from a comment of @TomvanderZanden. For the sensor to stay within the limits of the bed (considering the ...
0scar's user avatar
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7 votes

Why is the center of my glass print bed lower than the corners?

This seems to be a common problem with ender-3 and cr-10 printers from Creality. Mine is the same way but not enough to keep prints from adhering. Typically the aluminum bed is not perfectly flat. ...
T. M.'s user avatar
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7 votes
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What is ABL or UBL? Is this the same?

What are ABL and UBL? ABL stands for Automatic Bed Leveling UBL stands for Unified Bed Leveling Level the bed? A level bed (twisting knobs under the bed), or a surface that is exactly followed by ...
0scar's user avatar
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6 votes

Issues with Auto Bed Leveling

Your problem is that the hotend carriage does not stop when the sensor triggers. I assume you mean "on homing", not "while printing" (UPDATE: after watching the video it is confirmed that it is "on ...
0scar's user avatar
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6 votes
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Adding extra Z-offset to bed for PETG in Slic3r

An extra gap of 0.2 mm on top of your existing gap seems rather illogical as the filament is not squished at the build plate anymore. Furthermore 0.2 mm plus something you already have will soon ...
0scar's user avatar
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6 votes
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Tevo Michelangelo nozzle below build plate?

Just move the Z-endstop up a little higher, also make sure the bed leveling screws are not completely screwed in. So: Move the head of the printer up. Move up the Z-endstop so that the nozzle is a ...
0scar's user avatar
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6 votes
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How to level bed after applying glue stick for bed adhesion

How much glue do you put on it? I use PVA based spray, barely visible, very evenly spread and no problem whatsoever of sticking paper to the glue layer. Just level the bed as you normally would and ...
0scar's user avatar
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6 votes

Auto physical bed leveling?

Automatic bed levelling is not magic; it still requires you to level the bed properly (as level as possible). The upside of automatic bed levelling is that it compensates for small deviations like a ...
0scar's user avatar
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6 votes
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What is the Fade Height option in Marlin?

Fade Height is used to specify the height above the bed at which the printer should stop fading the bed leveling correction. Bed leveling is gradually decreasing with each successive layer until fade ...
kosteklvp's user avatar
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5 votes
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Marlin's bed leveling Mesh Validation Pattern ignoring home offset

A Marlin developer confirmed that bed-leveling and probing are now performed entirely in the machine coordinate space. To clarify further, if one has a non-zero home offset enabled, the following ...
Ian Mackinnon's user avatar
5 votes
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What exactly does automatic bed leveling do?

Last first: use of a raft has nothing to do with bed levelling. It depends only on the features/shape/etc of the object being printed. Now, as to what the auto-levelling does: the answer is, sadly "...
Carl Witthoft's user avatar
5 votes

How bed leveling is achieved without table screws?

Prusa uses 9 marker points in the bed that are sensed with an induction sensor to determine the X, Y and Z position. Any deviation for skewness or bed level is compensated through the software. Please ...
0scar's user avatar
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5 votes

What exactly does automatic bed leveling do?

Basically there are two problems to address: first - bed inclination and second - uneven bed surface. There are different algorithms dealing with one or both problems. Most specialists insist that ...
Serge Rabyking's user avatar
5 votes
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How to set the boundaries for BLTouch probing

As explained in this answer it is you that needs to calculate where the head (read sensor) is supposed to go depending on the amount of space you have left on the carriage shafts. As can be seen from ...
0scar's user avatar
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5 votes
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I can't level my bed any more

The bar where the level is attached is the support cross-bar for the X-axis travel. It's important this bar be level, but it's even more important the bar be true to the rest of the machine. We call ...
Joel Coehoorn's user avatar
5 votes

I can't level my bed any more

For leveling your bed you do not require the use of a bubble level! This is not necessary, if you do, you need to place the printer on a bubble level underground. It is far easier to level the bed ...
0scar's user avatar
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5 votes
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ANet A8 running Marlin v1.1.9 Auto Bedlevel with ROKO SN04-N

Too bad you broke the acrylic plate (nice temporary fix though), but you can easily print a replacement part once your machine is up and running. Probe positioning is defined in the Marlin ...
0scar's user avatar
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5 votes
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Thread pitch of Ender 3 bed leveling screws

I measured mine with a thread gauge and it says the pitch is 0.7 mm. So, as the stock adjustment wheels have 14 bumps around their circumference, turning by one of those is an adjustment of exactly 0....
Andrew Morton's user avatar
5 votes
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Installed bed leveling probe, now Z homing moves to center

This is a consequence of enabling Z_SAFE_HOMING: Z Safe Homing prevents Z from homing when the probe (or nozzle) is outside bed area by moving to a defined XY ...
rgov's user avatar
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5 votes
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Bed wobbling on Ender 3

If the V roller wheels aren't tight on the Y axis beam, it means the eccentric nuts are not adjusted correctly. Two of the rollers are mounted centered on the holes in the carriage frame, but the ...
R.. GitHub STOP HELPING ICE's user avatar
5 votes

Nozzle not level and first print failed

Your Z-endstop assembly is clearly too high. Referring to your own first foto you see that the switch on the Z-endstop mount is nearly touching the bottom of the X-Z mounting. You need to adjust the ...
0scar's user avatar
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