Non-contact Dial Indicator for 3D printer

Description

It detects the distance from the nozzle to bed and then adjust Z axis height in real time.

There is no Z axis move up and down for Probe, so it will be much fast.
The distance will be displayed on the LCD that will be useful for doing menu level.
This is a high resolution inductive Bed Distance Sensor, it can measure the distance from bed to nozzle with distance resolution.

More details:https://github.com/markniu/Bed_Distance_sensor

Details

with this sensor the printer can adjust the z axis in real time if the bed plate is not flat in every point,also no need to do probe points before every print.not only the plate not flat itself but also the high and uneven temperature will also cause the plate to expand and contract.
you can do mesh bed leveling like normal proximity sensor but much faster with this sensor, because it's no z axis down and up at every probe point.so you can do more probe points in short time.

Distance resolution:0.01mm

Operating Range:5mm

Repeatability:+/- 0.005mm

Communication port: I2C

Connection| only 4 wires: GND,5V,I2C_Data,I2C_Clk

Calibrate:

Send gcode M102 to Calibrate, we need to calibrate this sensor before first use or the bed plate have been changed to different materials, Because different metal plates are made of different materials, they may have different electromagnetic properties. normally this process will take about within one minute in 3D printer

Here is the data diagram of this sensor, we can see that the distance resolution can be 0.005 to 0.01mm below the 5mm

Project Logs

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Fast Bed Leveling test 300mm/s
mark • 04/17/2023 at 03:55 • 1 comment

after one week work there's a progress, fast bed mesh for klipper with BDsensor, 300mm/s , klipper source code: https://github.com/markniu/klipper
Klipper Installing
mark • 01/23/2023 at 07:00 • 1 comment

Here is the beta version of Klipper that support Bed Distance Sensor

https://github.com/markniu/Bed_Distance_sensor/wiki/Installing-for-Klipper
Status of Klipper
mark • 12/27/2022 at 09:19 • 0 comments

There are some progress on Klipper after one week of source code work.

can display the distance value on screen, homing, but still need some work for the probe, calibration ...
Working on Creality board
mark • 11/17/2022 at 03:31 • 0 comments

Working on Creality board V4.2.7, ender3
There is an update to aluminum housing color and label of BDsensor
mark • 11/15/2022 at 02:33 • 0 comments

The reason is that the old label was not stick well and the black color seems to be more fit to most black printer.

this update is for orders from Nov 14, 2022. Thank you for liking and supporting my project.
Bed distance sensor open box
mark • 11/02/2022 at 07:30 • 0 comments
Use this high temperature resistance AB glue and nylon print case now!
mark • 09/26/2022 at 15:38 • 0 comments
Installing on SKR V1.4
mark • 09/05/2022 at 06:37 • 0 comments
Fast probe
mark • 07/20/2022 at 03:46 • 0 comments
Stable test with heating BED
mark • 07/01/2022 at 03:56 • 0 comments

I just take a video about this sensor work with heating bed. so far the inductive sensor is stable and accurate than I expect before.

View all 21 project logs

Discussions

housewright30 wrote 04/18/2023 at 09:20

I have to ask has anyone gotten one of these yet. It looks awesome but I have to say I am getting some scamy vibes from this since this has been around almost a year and I can't find any reviews or confirmation that this is a real thing. If someone could confirm they have this and its working as expected or post a video I will for sure buy it but until than its just a dream.

So I have to take back what I have said with my post above. I found that he has a facebook group and many people are asking questions and helping each other with the setup of this. This means that it is for sure real and people are getting the device.

3D printer board,Panda series

Are you sure? yes | no

SGG918 wrote 03/01/2023 at 00:49

I purchased one of these guys some time ago. What is the status of shipping?

shs@skolnik.net

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Lint wrote 12/08/2022 at 13:08

So the Red and Black Wires are purely for power while I can use any other data pin, like the two you you are using with the stepper driver to communicate with it?

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mark wrote 02/08/2023 at 01:50

Right, you can use any 2 GPIO(general-purpose input/output from the MCU) pins for the 2 data pins

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Sergey wrote 11/15/2022 at 19:56

It can work with flying bear ghost 5?it can work with flying bear ghost 5?

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mark wrote 11/17/2022 at 01:42

it should work if it supports marlin firmware and BLtouch, but not sure.

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Steeleio3d wrote 11/15/2022 at 16:00

Does this work with Klipper?

Are you sure? yes | no

mark wrote 11/17/2022 at 01:39

still need some software work in Klipper,

Kippler support · Issue #1 · markniu/Bed_Distance_sensor (github.com)

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NeoMod wrote 11/15/2022 at 15:13

I'm so happy to see the "nylon case" version is now in production, I was waiting for it.

Just a quick thought: what happens when the first layer of print is completed, and thus the sensor won't have any more an "open view" of the bed? Will it still be able to "sense" the distance for a few more layers or the levelling at that point is dependent on the other FW heuristics?

Thank you.

Are you sure? yes | no

mark wrote 11/17/2022 at 01:33

Thanks @NeoMod , We can set up for dynamic leveling with gcode M102, For example M102 S4 means it will do adjusting while the Z height is <=0.4mm, you can set the higher value that within the sense range.

Are you sure? yes | no

Nagy Szabolcs wrote 11/14/2022 at 09:51

What sensor is used in it? How does it work?

Why is the coil needed?

Details please, this is hackaday.

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NeoMod wrote 11/15/2022 at 15:17

Well yes, this is hackaday, but this is still a custom/proprietary sensor module. There is no need for the author to disclose exactly how it's made. Besides, we can get a glimpse of the basic principle by looking at the photos (the coil in particular) and then reading the code used for sensor integration.

Edit: Also, the origin of the idea is known and made public by the author while referring to the BAUMER IND LINEAR SENSOR 10155694.

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mark wrote 11/17/2022 at 01:52

Right, the principle is based on the normal inductive proximity sensor, like this chip TCA355G - Infineon Technologies after reading that I know how that works and then I know how to make the idea come true.

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DC wrote 08/01/2022 at 01:25

What temperature will this sensor survive in?

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mark wrote 09/14/2022 at 06:55

depends on the shell of the coil that is 3D printed with PLA in current version.

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NeoMod wrote 09/18/2022 at 21:20

I love the idea behind the sensor, and I'm going to buy one as soon as possible. But please consider giving the option to ship them with a non-permanent coil case so that we can print the enclosure in our choice material. It won't be a bad idea either to offer the default shell in PETG instead of PLA: I do believe the slight increase in cost for the material would be well within margin profits at this same price.

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mark wrote 09/21/2022 at 09:21

Thanks @NeoMod I am consider to print with nylon in 3D print factory, since the AB glue is used so it hard to assemble for customer repalce

Are you sure? yes | no

Ken271 wrote 09/23/2022 at 12:11

I placed an order for 2 of these over on Aliexpress , Did not see you also have a Tindie site. Anyway, I noticed no activity as far as shipping yet. Is that because you are going to use nylon in place of the PLA? I would not have ordered one yet if I had known it had a PLA housing that would be difficult for me to remove..

Are you sure? yes | no

mark wrote 09/26/2022 at 15:55

@Ken271 Thank you very much! your package have been send out last week. and use this link to track the package https://www.17track.net .also you can PM me in the aliexpress messager,l can send out the new nylon one to you if the pla one not work for you.

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IT-Wizard wrote 06/14/2022 at 07:15

I am wondering how you connect this sensor to the printer. Does it need a special port ? Is it only for a certain type/brand of printer ?

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mark wrote 06/14/2022 at 07:32

this sensor use the I2C, so any board have 2 free gpios can connect to it.

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mark wrote 06/14/2022 at 04:00

Thank you very much!

Are you sure? yes | no

Patrick McCreanor wrote 06/10/2022 at 15:20

Excellent. I look forward to trying one out.

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Non-contact Dial Indicator for 3D printer

Description

Details

with this sensor the printer can adjust the z axis in real time if the bed plate is not flat in every point,also no need to do probe points before every print.not only the plate not flat itself but also the high and uneven temperature will also cause the plate to expand and contract.

you can do mesh bed leveling like normal proximity sensor but much faster with this sensor, because it's no z axis down and up at every probe point.so you can do more probe points in short time.

Project Logs

Collapse

Fast Bed Leveling test 300mm/s

Klipper Installing

Here is the beta version of Klipper that support Bed Distance Sensor

Status of Klipper

Working on Creality board

There is an update to aluminum housing color and label of BDsensor

Bed distance sensor open box

Use this high temperature resistance AB glue and nylon print case now!

Installing on SKR V1.4

Fast probe

Stable test with heating BED

Discussions

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Non-contact Dial Indicator for 3D printer

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Description

Details

with this sensor the printer can adjust the z axis in real time if the bed plate is not flat in every point,also no need to do probe points before every print.not only the plate not flat itself but also the high and uneven temperature will also cause the plate to expand and contract.

you can do mesh bed leveling like normal proximity sensor but much faster with this sensor, because it's no z axis down and up at every probe point.so you can do more probe points in short time.

Project Logs Collapse

Here is the beta version of Klipper that support Bed Distance Sensor

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