Mesh bed compensation issue

[kiki0000]

@norder said in Mesh bed compensation issue:

But this plan is important for you after I have calculated my level points.

At first thank you for the detailed comment again.
I have done a similar CAD drawing already in the morning the only difference was that I did not put hte G31 points onto the line pointing into the middle of the bed only the same distance from the Z axes in all 3 cases. Now I changed this according to your proposal.
This is how it looks like (I know it i sa mess just because I wanted to put all the measurements from the frame etc onto the drawing.)
The biggest rectangle is my frame (I cannot reach with the current setup the rear 5mm of the bed this is why my max Y limit is 305. I know this is stupid because I could move the complete Z assmebly 5-10mm forward and then I could reach it but I have just done some changes and I was too lazy to do this up to now ).
The bed is clearly the 310 x 310. Furhtermore you can see the 3 outside points (41mm from the frame on both sides ) for the 3 axis and the 3 inner points on the lines now are the probing points for the G32 (262mm is my max Y reach point on the right for the BL touch).

This is how my heightmap looks like with a narrow space all around (after the Y axis realignment now this is on the same level in the entire bed length but ca 0.13mm higher than the rest of teh bed.).

@norder said in Mesh bed compensation issue:

I saw that your axis limits are not quite OK.
At minimal you have a positive value (X2).
M208 X2 Y-40 Z0 S1 ; set axis minimum
And at maximum you have a value that is smaller than the actual print bed (Y303).
M208 X320 Y303 Z300 S0 ; set axis maxima

As I wrote above I am limited at 305mm at the moment because of the bed position on the actuan assembly. I will later on move the complete Z assembly forward by 10-15mm.

@norder said in Mesh bed compensation issue:

Yes, sometimes it is a bit confusing whether the offset values ​​of the probe are taken into account or whether you have to do it yourself.
If you enter G30 without coordinates, then the probe measures where the print head is currently located.
If it is to be a specific point that is to be measured, such as X20 Y30, then you have to go there beforehand with G1 and calculate the offset yourself, i.e. G1 X78 Y30.
Your new probe offsets are included here.

Yes, little bit confusing but now I already figured out which is taking into account the offset and which not. Thanks a lot

@norder said in Mesh bed compensation issue:

I hope Google doesn't translate it into cryptic and it helps you get there.

No, it was perfect. Thanks for the lots of help again

@norder said in Mesh bed compensation issue:

Not many people have such a nice, flat and uniformly green heightmap as @rogerpodacter has, which does not mean that the first layer cannot be printed absolutely perfectly

Unfortunatley not... and this is my 2nd cast alu bed for a hell amount of money.......

@norder said in Mesh bed compensation issue:

Measure the area where the BLTouch goes after the conversion, remember the M564 command I gave you in comment #15.
Measure the points and coordinates from the example sketch.
Changing the axis limits in the config.g with the new insights from the M564 thingy.

I have done these all now I am just printing my test.

@norder said in Mesh bed compensation issue:

So I have to vote now. Today is elected here in Germany / Lower Saxony.
I hope there will be positive changes after that.
It can't go on like this.

Haha By the way I am also living in Germany at the moment (since 4 years) but I am moving in 1,5 month

[kiki0000]

@kiki0000 said in Mesh bed compensation issue:

@norder

@norder it turned out perfect on the entire surface really close to the sides too. Ignore that single ca 5x5 mm spot on the fron left short piece (picture is rotate 90 deg to the right now...). All around is perfect so it was jsut some grease on the plate. It is nice to work on the print surface....
I hope it will stay like this now forever

Thank you for all the support.

[RogerPodacter]

@kiki0000 I was going to respond to your updated bed mesh, where the left side was angled sloping downwards. this to me is a very good result and shows your bed is very flat, but the left horizontal Y rail was simply out of plane with the other Y rail. Once you get symmetrical probe points, the left over is is hardware related, which one final adjustment should fix it permanently.

Then i see you mentioned something about grease, and now you have good results. I hope your bed mesh is looking good now.

[Norder]

@kiki0000
It's wonderful that the print result is now usable. The thing about the unusable area because of the offset Z assembly is annoying, but not a broken leg.
In all the years I have only used the complete print bed for one printed part, there was only a few mm of space at the edge.

Oh, you live in Germany, where about?
Then you can speak German and I'll break one off here to write it in such a way that even a cryptic translation can still be understood.
Where should we go at the turn of the year (relocation)... in the south?

[kiki0000]

@rogerpodacter this is how my heightmap looks like. I definitely have a higher band on the left side but now it is straight and the prints look perfect.

Thank you for the support.

[kiki0000]

@norder said in Mesh bed compensation issue:

The thing about the unusable area because of the offset Z assembly is annoying, but not a broken leg.

I could somehow make my print head smaller and putting the BL touch closer to the head. Then I would get my ca 30mm back.

@norder said in Mesh bed compensation issue:

In all the years I have only used the complete print bed for one printed part, there was only a few mm of space at the edge.

I think I have never printed full bed...

@norder said in Mesh bed compensation issue:

Oh, you live in Germany, where about?

I live in Munich.

@norder said in Mesh bed compensation issue:

Then you can speak German and I'll break one off here to write it in such a way that even a cryptic translation can still be understood.

I can speak German a little bit but English is definitely better for me.

@norder said in Mesh bed compensation issue:

Where should we go at the turn of the year (relocation)... in the south?

I am originally hungarian and we will move back there. We bought a house there (around Munich this is impossible) and now I will have a nice workshop at home (basically 2 because an electrical and a mechanical in the garage) I am super excited.

[Norder]

@kiki0000
Munich... expensive patch.

Hungary... very nice... when I hear Hungary I always think of lots of nature and friendly down-to-earth people who are content with what they have.
I would like to see Hungary for myself.
Who knows, if my dream of an expedition vehicle comes true, we might meet at the gas station or in the supermarket and nobody will know about the other.

[kiki0000]

@norder said in Mesh bed compensation issue:

would like to see Hungary for myself

I would recommend to visit lake Balaton (Plattensee) . It is really nice and huge.