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Roxy,

I have 2 Lulzbot TAZ 4's and I'm trying to implement auto bed leveling using Marlin the way Lulzbot does with their newly released TAZ 6's as shown here starting at 33 seconds:
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Hi Roxy, is auto bed leveling with matix available yet or is it still a work-in-progress? I could really use that functionality; hence the reason for my question.

Hi Roxy,

I finally got my auto bed leveling working. Here's a video demonstrating it:

https://www.youtube.com/watch?v=AnHCrnXoj9k

and here's the more lengthy post that includes a little...

How do you know it raises too much on the left side. Is the filament not sticking to the bed or is it fatter on the left side than the right side?

Marlin will fit the best plane possible through...

Hi Roxy,

In pins.h I have the Case Fan defined:
#define FAN2_PIN 2 //Fan2 --- Case Fan

I need to run this fan so my stepper drivers don't overheat. Please let me know where the...

Roxy, I am able to upload BeckDac with my modified Configuration.h to the RAMBO board on my printer; however when I close out of Marlin on my laptop, reopen it and try to upload it again (with or...

OK, thanks. It turns out I'm glad it does not include that information for the way I am currently implementing auto bed leveling so if it is included in a future version perhaps there could be a way...

With Grid Based Leveling does Marlin use the first homing point (found w/ G28) as one of its points in the plane that it generates with the least squares fit method?

OK, thanks Roxy, Grid based leveling is working.

Roxy, 3 point auto bed leveling is not working. After having so many issues with trying to get a good first layer I finally ran a large rectangular calibration print and found that the z-axis rods...

Very cool, thank you. I'm currently printing with 3 point leveling and printing parts to set up my printer to go with 4 point leveling; hence the reason I need both...for the time being anyway.

Hi Roxy, G29 n 2 T does not work for AUTO_BED_LEVELING_GRID. Marline still probes 9 points. Shouldn't I be able to just probe 4 points (for example the 4 corners) with G29 n 2 T.

It worked, I'm probing three points. Thank you. I expect to have an interesting auto bed leveling modification working within a week. I will post to your website when it's good to go.

Awesome, thank you. And just so I don't mess it up, when you say drop those saved files on top, do you mean copy the text in my files and paste it over the text in the respective tabs of the Beckham...

Hi Roxy, attached are my Marlin files for you to work your magic.

Oh sorry, let me explain my setup. I'm using the hot end nozzle tip to tap the bed which triggers fsr's attached to the underside of the bed to fire off just like a probe. So my x, y and z offsets...

Thank you for the code Roxy. If I don't retract between probe points, I'm concerned the hot end will drag across the glass build surface if everything is not perfectly leveled to begin with.

Do...

Hi Roxy, I attached my Marlin_Main as a zipped text file. Please let me know if you need anything else. Thank you.

Thanks. I did not modify Marlin_main.cpp, I only modified the configuration.h file. I'll post Marlin_main.cpp when I get home in a little bit.

Hello Roxy,

When I comment out the AUTO_BED_LEVELING_GRID and try to upload the 3 point leveling to my TAZ I'm getting the following error message in Marlin_main.cpp $:

'retract_flag'was not...

Oh, so if I give it a G29 n 3 T will it calculate the surface using 9 points and if I give it a G29 n 5 T will it calculate the surface using 25 points.

Also, how does Marlin determine what the...

Hello Roxy, it worked like a charm. Thank you.

One last sticking point though. I also tried working with the AUTO_BED_LEVELING_GRID and whether I put in a value of 2 or 5 for #define...

Thank you Roxy. We cross posted, I just read your last response. I was hoping I could just change a few lines, but it sounds like it's better to use the latest version and copy over the #define...

Alternatively, is it worth a shot to cherry pick lines from the version at your link and add them to my existing version of Marlin? If so, which lines?

Yea, not sure why they had to butchered it. I have a Lulzbot TAZ 4 so it was convenient to use their firmware. There's probably a lot of settings i will need to modify to use the Marlin at your...