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9 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 ...
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6 votes
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Automatic Bed Leveling (ABL) with a sensor (BLTouch, inductive, capacitive), how does it work?

The issues/questions raised about the automatic bed leveling using e.g. a BLTouch probe at this stack require a more in depth description of the automatic leveling functionality in general, this ...
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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 ...
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4 votes

Filament Leaking During Automatic Bed Leveling

The oozing is due to hot-end getting hot before the bed leveling procedure: if you move the hot-end warm up command after the G29 line you avoid that oozing ...
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4 votes
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BLTouch Probing Fails Intermittently

Is your BL Touch a v3 (likely if you've only just purchased it)? If so, make sure you're using the bugfix version of Marlin 1.1.9, which supposedly fixes the compatibility issues. I say supposedly ...
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4 votes

BLTouch wiring and pin assignments

Note: The question has changed after posting this answer. This answer answered the previous question, but is now out-of-date with respect to how the question has changed; I'll update it later, as it ...
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4 votes

Ender 3 BLTouch first layer problems

I manage to get the printer working, it was an hotend issue. Was clogged, replaced nozzle and working as expected. Thank you all for the guidance!
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4 votes
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Ender 3 Pro will not auto home correctly after mainboard & BLTouch upgrades

Resolved : connected the white & black wires to the 5 pin output on the board. This solved the homing issue.
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3 votes
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G29 Auto Grid Leveling Doesn't Do Anything

G-code is read line-by-line, see e.g. Is G-code read line by line?. If the posted start G-code is the actual used G-code, G29 is not executed because it is on the ...
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3 votes
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How to use a BLTouch or equivalent touch probe to 3D scan objects with a 3D printer?

I don't know the probe, but I have used a delta 3D printing machine (of my design) to scan a surface. It takes some time. Your resolution will be limited by the probe geometry of the touch probe tip....
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3 votes
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BL-Touch bed leveling seems to produce tilted bed level around Y-axis

The problem with the Tevo Tornado design is that the design is as such that the Z-axis is powered by a single stepper (under the assumption that you have not added a second Z stepper). This means ...
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3 votes
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Anet A8 with 3DTouch does not home X in the center

Your sensor offset for the X direction is incorrect. #define X_PROBE_OFFSET_FROM_EXTRUDER -28 // X offset: -left +right [of the nozzle] should be ...
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3 votes
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Automatic leveling probe offset; adjusting for one side ruins the other

I have had exactly the same experiences as you did with a inductive sensor on a Prusa i3 clone. It looks as though the bed leveling is not executed, or the level/mesh tilted. Please do note that ...
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3 votes
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Configuring BLTouch with Marlin firmware

For security reasons, you cannot move Z until home position is applied to X, Y and Z. With the level sensor attached, we need to home X and Y, and then Z will be homed in the middle of the bed (as ...
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3 votes
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What are the pros and cons of using a BLTouch in place of a limit switch?

Touch sensors (or inductive or capacitive sensors) are generally used to probe the bed to determine the bed shape. For metallic beds that are not perfectly straight this works excellent. But, if your ...
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3 votes

BLTouch not leveling

You are mixing and matching a few older techniques. That's understandable, because "older" means "as of three months ago." But there is a better way now: as of version 2.0, the SKR ...
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  • 228
3 votes
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Z axis no longer working on a working printer

It could be caused by software or configuration issue. Possibility 1: just worked after re-installation of Marlin You could have Z steps/mm set to 0 in EEPROM, and did not notice that fact. It is ...
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3 votes

Z axis no longer working on a working printer

Issue seems to be resolved. I deleted my Marlin copy, downloaded a fresh copy and I started again. What worries me is how a working copy and a working printer can suddenly have this issue. Feel like ...
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  • 173
3 votes

Z offset not working after flashing TH3D firmware

I'm pretty sure something is wrong with the firmware I downloaded. I flashed the 3/5/21 version of Marlin firmware from https://marlin.crc.id.au/ and it is somehow working better with the LCD firmware ...
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3 votes
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Marlin is restarting when pins 5 Vcc are enabled and has a servo motor connected (RAMPS 1.4)

PSU is only feeding 12 V into RAMPS, but (if I remember correctly) RAMPS is using Arduino's onboard regulator for converting 12 V to 5 V. That regulator can not provide much power. If you connect some ...
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3 votes
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Problem with BLTouch on Ender 3 Pro

For anyone who has this problem in the future my solution was to loosen the screw on top of the touch just a little bit
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3 votes

How do I change Z safe homing coordinates in the G-code , not in Marlin

Don’t home the Z. Rather measure the height of your print to continue at with calipers. Or with detective work in your G-code preview, finding the layer your print stopped at and finding the Z height ...
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3 votes
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What would cause magic smoke with a BLTouch installed?

Given F2's proximity to the linear 3.3V regulator and some inductor and large diode possibly belonging to a switching regulator, it is likely that some short circuit caused the fuse on a power rail to ...
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3 votes
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Ender 3 with BLTouch ignores Z0

Successfully solved the problem. Removed the Z rod from its socket, and greased up the threaded slot it goes into on the x gantry, that seemed to solve the problem.
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2 votes

Filament Leaking During Automatic Bed Leveling

I have noticed that leveling with a heated nozzle and bed is different than leveling cold. If you want to level with a hot plate and nozzle, another more simple solution is to retract more filament at ...
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2 votes
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Is endstop / z-probe wire required for BLTouch installation on CR-10S

A touch sensor is also a height limiting switch, so you sacrifice the Z- limit switch in favor of the touch sensor (or an inductive sensor). Furthermore, all your concerns are taken care of by the ...
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2 votes

How can I fix First Layer Adhesion with BL Touch - Tevo Tarantula

I have the same kind of issues I'm also using Sunlu white filament 210 °C and bed at 60 °C on a CR-10S also original BLtouch v3.1 On some parts of the bed it's okay but in the ...
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2 votes

BLTouch wiring and pin assignments

After studying the Marlin code, I found the answer I was looking for. If I have a spare PWM pin, I can assign it to anything I want. So the best solution is to define the pin as a ...
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2 votes
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How to connect BLTouch sensor to Alunar M508 using LSEE 3D v1.0 board?

The LSEE 3D is basically a RAMPS board (your linked source also shows that the used MOTHERBOARD is a RAMPS board: ...
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2 votes

BLTouch calibrated, nozzle still dives into the bed

This answer is intended to be a generic answer for Z-offset determination. The question is not clear on how the Z-offset has been determined. It appears as if this distance is measured, while in ...
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