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Hi Roxy

Thanks for clearing that up. It does help when trying to work out what could be wrong to understand the logic a bit more.

So, with 3 point levelling are you basically defining the...

What I'm trying to work out is when using auto bed levelling, if a 2x2 grid is supplied does it just use that as it's plane ie. no calculations required to try and establish the best plane to use? I...

Hi Roxy

if you have an inverted axis does this change the origin? I suspect not but I'm clutching at straws now.

Did some more tests. Using a 2x2 grid and mesh levelling seems to give good...

Hey Roxy

Had a go with Manual Mesh Levelling last night, and interesting enough doing a 2x2 grid produced pretty good results. I understand this works using a different method to auto bed...

Hey Alex

That's a decent size print area you've got. Mine is only 250mm cubed. Your prints will be going on for days at max size! ;-p

To be honest, I don't know what else is loaded from the...

Hi Alex

Sometimes it's easier if you attach your configuration.h file so it can be checked out, but the first page of the forum had lots of helpful information about how to use the G29 command. ...

OK, commented out that code group as suggested, and another three lines further on that also stopped it from compiling:

free(plane_equation_coefficients);
free(eqnAVector);
free(eqnBVector);
...

As recommended, I reduced my HOMING_FEEDRATE speed for the Z axis to 4x60 (previous 8x60). I also tried an 8x8 grid, just on the off chance but neither seems to have helped. I'm always amazed it's...

Hi Roxy

Thanks. I think the printer will be great if I can just get some reliability.

It does seem strange. When I made the bed really wonky it printed exactly the same as it is now, so it...

Hi Roxy

Unfortunately the back left corner is pretty warped, and there isn't anymore adjustment available...I'm already using longer M3 screws.

I've uploaded a video as recommended. It does a...

Hi Roxy

OK, I've levelled the bed back out so it's now within about 0.3mm across the bed.

I've done two test prints, one using G28 followed by G29 T n5, and one just G28. The print with just...

Originally I was using 2x2, but generally I've been using 3x3. For the examples above in my original post and further testing I've been doing over the last couple of days I've been using 5 x 5. ...

Thanks for reply.

So is the routine not able to cope with such large offsets? I only ask as I saw some videos of people printing on really slanty beds (1cm+) just to prove it worked.

As I said...

Hey Roxy

Just wondered whether you could shed any light on a problem I'm having with auto levelling on a Lulzbot Taz 5 (Rambo 1.3). It's sooooo close to working!!

I built a small capacitive...