So I finally got a bed mesh visualizer plugin working in Octoprint...  

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

If I were feeling experimental - I might try a thin (.5 mm'ish) washer under the back right corner, under the plate.

Then run the test again.

If you do anything like that - report back and let us know how it goes.

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

Posted by: @dr_piazza00

And I'm not quite sure how I feel about it. I mean I appreciate being able to see the mesh readings, which confirms what I've always suspected, but I don't quite know what to do about it, or if anything needs done about it. Six tenths of a mm seems quite substantial. I'm not exactly having problems with initial layers on print jobs any longer once I finally got each of the 2 sheets their own profiles corrected with the compensation function a couple of months ago. But there's that part of my brain that wants to correct that back right corner, and I was wondering if there was something I could/should do without a full blown washer modification. If there is anything, would it be worth it, or just a waste of time? Could it possibly make things worse even? I don't have much experience with non-manually leveling beds as I've only had my Prusa since mid/late December.

Is it as bad as I feel like it is? Or if I'm not really having problems with it, should I just leave it alone? 🤔 

Thanks in advance for any recommendations 

Check your y-rod on the right frontside. It's to deep. Did you have recently a nozzle-bed crash?

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

I was wondering if rods could have any effect.

Plate height can only be measured where the extruder is, which is roughly the middle of the rod.

It has no way to check the ends.

Or am I just thinking of this wrong?

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

@robert-rmm200

It is not the rod itself, i think it's more the holders with the zipties. On the front about 0.3mm to deep and on the back 0.3mm to high. Otherwise it's not possible to have 0.6mm difference on the y-axis. In my case, i attached a gauge to the extruder and checked the alignment of the printplate. A comparison with the meshbed plugin shows only 0.05-0.1mm difference.

So or so, i would check this.

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

If you really want to make sure everything is spot on, you need to check your X and Y rods are setup perfectly to each other.

Using something like a precision glass block: https://www.amazon.co.uk/Ajax-Scientific-LI272-0110-Rectangular-Length/dp/B00EPQB4UA/ref=sr_1_9?keywords=glass+block&qid=1584122040&sr=8-9

Making sure the Z is perfectly horizontal when homing, bring it down until you can sit the block below the rods to set the height of the Y rods to the X rods to be the same distance exactly, and the Y rods need to be at 90 Degrees to the X rods exactly.

The drawing below makes more sense, but get this right first before anything else like adjusting of the bed level.

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

@karl-herbert

It's been a couple of months, but there was a time where I had the x axis bearings to tight, causing the carriage to think it was homed when it wasn't. That lead to the carriage going to far to the right during a mesh sequence, like so far the pinda sensor wasn't over the print bed any longer... When the pinda wasn't over the plate but the nozzle was.... I'm sure you can imagine how that went; it felt pretty bad. In terms of my y rod holders though, what do you suggest to remedy something like that, printing new ones? Taking my calipers and measuring the height between the top of the rod and the top of the front/back plates, both come out to ~1.2mm; was right around 0.01. Wouldn't they be like 0.8-1.4 if one was 0.3 to low and the other 0.3 to high?

@chocki

Ty for the information and the drawing, but I think I'm going to hold off on buying a glass block for now. I never thought about using such a thing when going for precision in terms of leveling and angles. I can think off 10 projects right off the top of my head when having that would had came in super handy, so I might end up with one sooner than I'm wanting to admit lol.

@robert-rmm200

I thought about printing a "shim" in the shape of the low spot 0.3mm thick to see what would happen. I think I'm going to do that tomorrow morning, because I'm courious now as well, and I'll deff let you know how it went 😋 

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

How do you even install it?  I looked everywhere and it's not in octoprint plug ins.  I then found :

https://github.com/PrusaOwners/OctoPrint-PrusaMeshMap

I put in the url for the zip file and it installs but I can't see it anywhere.  Then when I check the plug ins it say python isn't right... I have no clue how to install the other software package that is needed.  I am running a 3b+

When I type:

pip install /home/pi/oprint/bin/pip install 'numpy<1.17'

I get a no directory found and no such command found.

Thanks,

-Nigel

RE: So I finally got a bed mesh visualizer plugin working in Octoprint...

@newshockerguy

PrusaMeshMap is also no longer running on my Octoprint 1.4.2 installation (python compatibility problem). I would recommend the Bed Visualizer plugin. It is much more comfortable and you can set many parameters. 

https://plugins.octoprint.org/plugins/bedlevelvisualizer/

The plugin should be listed in the octoprint pluginmanager.