VC4 400mm Bed Mesh - Bowed Gantry?

Running my first bed mesh and I think this is within a reasonable range to continue but would love a sanity check and advice on if I have a bowed gantry and should attempt to straighten it or just continue on. Thanks!

RubbyOP•9/6/24, 4:24 PM

Retightened the X gantry rail and now it is slightly worse

VisualTech48•9/6/24, 5:13 PM

Well You've pushed you X upwards too much, basicly you want the first two front points to be flat

VisualTech48•9/6/24, 5:14 PM

So in your case you'd push the x gantry a bit down.

VisualTech48•9/6/24, 5:14 PM

In the middle

VisualTech48•9/6/24, 5:14 PM

THe Y will correct itself mostly, but you are in a good range of 0.16

VVisualTech48 Well You've pushed you X upwards too much, basicly you want the first two front ...

RubbyOP•9/6/24, 7:31 PM

Appreciate the feedback. I did indeed go the wrong direction. Although looking at the graph now I think I have the X and Y confused in direction. This looks like the hump is actually in the Y axis?

RubbyOP•9/6/24, 7:31 PM

VisualTech48•9/6/24, 7:37 PM

Your X is now officially perfect.

VisualTech48•9/6/24, 7:37 PM

Y can be caused by the bed itself or the sheet, I recommend rotating the Mangetic sheet by 90* degree

VisualTech48•9/6/24, 7:37 PM

TO see if its the sheet or the bed

VisualTech48•9/6/24, 7:37 PM

But again on a 400 riding on 0.16 is great.

VisualTech48•9/6/24, 7:38 PM

Basicly your Y at the middle approx goes down for some reason.

RubbyOP•9/6/24, 7:39 PM

Right so it could just be the sheet / magnet / bed and not much worth chasing it. I did rotate the sheet 180 degrees and the hump stayed in the same place. Not sure why I did not think to go just 90 degrees to see.

VisualTech48•9/6/24, 7:41 PM

Well then basicly its be the bed or the sheet.

VisualTech48•9/6/24, 7:41 PM

You could've easily done this when you applied the magnetic sticker but yet again

VisualTech48•9/6/24, 7:41 PM

0.16 is great.

VisualTech48•9/6/24, 7:42 PM

On that size sub 0.2 is really great.

VisualTech48•9/6/24, 7:42 PM

Also

VisualTech48•9/6/24, 7:42 PM

VisualTech48•9/6/24, 7:42 PM

Drag this to the end as you might think its a massive bump

VisualTech48•9/6/24, 7:42 PM

But it is in reallity again a difference of 0.16mm on the whole bed.

VisualTech48•9/6/24, 7:43 PM

What you could do to mitigate that is you can, but is it worth chasing its up to you really.

VisualTech48•9/6/24, 7:43 PM

You can always add kapton tape and get sub 0.1

VisualTech48•9/6/24, 7:43 PM

Again, not needed that is why the bed mesh is there.

RubbyOP•9/6/24, 7:44 PM

Yeah scale can be a tricky thing! Oh interesting. Add it on top of the magnet below the sheet? I think for now I may leave well enough alone and keep on with commissioning. See how it goes once I start printing. Appreciate your feedback and help!

VisualTech48•9/6/24, 7:45 PM

So yeah on top of the magnet, if you are really ocd, in your case you would add it to the low points, so anywhere but red.

VisualTech48•9/6/24, 7:45 PM

RubbyOP•9/6/24, 7:47 PM

Gotcha, may be worth fiddling with later on but may as well see how it prints first.

VisualTech48•9/6/24, 7:50 PM

This is the least of your worries atm

VisualTech48•9/6/24, 7:50 PM

Print man!

VisualTech48•9/6/24, 7:50 PM

Enjoy your printer.