Best posts made by sunToxx

@oliof thanks for this, it sounds quite reassuring. I'll just stick to the documentation when I have to touch any of the electronics!

@infiniteloop said in Mesh Compensation Overcompensating a bit?:

@suntoxx It’s a bit late for a comprehensive reply, but I will try my best …

Without the use of a preprocessor, I don’t know a way to automatically confine the mesh to an area used by the actual print.

Check out the Prusaslicer startcode i found last night. It works nicely! Just wish that Duet would handle it and not that you got to adjust it according to each slicer.

Maybe you could try some faster acceleration, 100 for Z looks quite moderate to me.

Z acceleration seems moderate in comparison to the other axis? What would that improve? I guess not much in terms of time. Less stringing?

Your Edits prove the value of a narrow mesh. However, mechanical precision of a printer is limited (not only by the BLTouch or the steppers), so it’s worth to take a look at first layer adhesion, too. To improve this, you could play with print speed, bed and hotend temperatures.

Yes, i am quite far up in temperature I think, using 70° and 235° for PLA for this print. I actually did have an adhesion problem too on this print, at least on some print positions. I did not know that Iso and paper is not enough. Using dishwasher or window cleaner now on top and adhesion on the king sheet is sufficient for this more difficult print.

Edit: Adjusted z by 0.01mm and result is consistent and perfect now!

@jay_s_uk yes, those 2 are in the config.g. Something like
G31 X-xx.x Y-xx.x

@fcwilt yes, it's a MK52 with the Mk-52-block carriage, with LHBB10 aluminium bearing blocks.

@fcwilt thanks for the response! It seems the print that failed before the problem appeared, left a small blob of filament on the tip of the nozzle and that interfered with the BLToch, because the BLTouch had moved up a tiny bit.

@fcwilt yes, but on the rest of the bed, even 441 is not enough to print more than one at a time. On this part of the bed, 49 points gives a close to perfect result for two keychains at once. It's pretty much the center of the bed.

So it appears to me that something around 0.1mm deviation is more less the limit of what the mesh compensation can handle, if you expect more than adhesion.

Edit:"not enough" i meant

@fcwilt ah, damn, i missed that all the way up there to the right. The disadvantage of 43" screens Thanks!

Do you by any chance know how to use the Echo command to create a macro?

@fcwilt said in Mesh Compensation Overcompensating a bit?:

A replacement bed sounds like a grand idea.

Yes, I wrote to Filaprint and will see what amount of money and effort this would take and then I will decide wether to do it or not. The numbers i print now i can do with printing two at a time, so for now I am not forced to do it. I also preordered the Prusa XL, so if i can wait until then, the possibility to switch nozzle sizes in prints will probably make quite a difference for this too.

And as much as I complain about the mesh compensation, even in my "sweet spot" where i can print two at the same time, i got 0.1mm deviation. Without the compensation, i probably wouldnt even there get the result i do now.