this post was submitted on 20 Jun 2023
14 points (93.8% liked)

3DPrinting

15661 readers
154 users here now

3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: [email protected] or [email protected]

There are CAD communities available at: [email protected] or [email protected]

Rules

If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![](URL)

Moderation policy: Light, mostly invisible

founded 2 years ago
MODERATORS
 

I have a bltouch clone which work fine on glass bed. After switching to textured PEI sheet, it's variance trippled to 0.1mm, which make my bed mesh all wobbly.

I'm I suppose to remove the steel plate when making the bed mesh? Do you home Z with a probe with this setup?

The weirdest thing is, despite all this all my prints adhere completely fine. I guess PEI is just that good.

you are viewing a single comment's thread
view the rest of the comments
[–] x7tYnC6c 1 points 1 year ago (1 children)
[–] fhein 2 points 1 year ago (1 children)

If you press down on the PEI/steel sheet manually, does it look like it's flexing or does it feel stable? When you switched from glass to steel+PEI, did you put an adhesive magnet sheet on the print carriage, or are you using some other method to hold the print surface in place? Just found a post on reddit where someone discovered that their build plate only sticks to the magnetic sheet when they rotate the plate 90 degrees, so perhaps that's worth a try.

[–] x7tYnC6c 1 points 1 year ago (1 children)

Nah it rock solid. The variance come from the texture itself.

[–] fhein 1 points 1 year ago (1 children)

Not doubting you, but I can't think of a logical reason for why it would be like that. The probe pin shouldn't push down hard enough to be able to deform the PEI

Perhaps as a workaround you could configure the firmware to probe each spot 3 times and average the result, if you don't mind the extra time levelling would take?

[–] x7tYnC6c 1 points 1 year ago (1 children)

I meant the probe is deflected by the texture. Taking multiple sample is what I'm doing, yes. It take at least 5 samples for it to be reasonably smooth, which is why I'm asking other experience.

[–] fhein 1 points 1 year ago (1 children)

You mean you think the probe slides off the bumps in the texture? I think the probe should be stiff and light enough to not do that, but perhaps you could've been unlucky if it's a clone not from a well known brand (e.g. Trianglelabs.. even Creality's probe's are supposed to be quite good afaik)

[–] x7tYnC6c 1 points 1 year ago

Yes. I'm certain it is a build quality problem. The probe is just plastic and by design hang freely. Even a steel rod with bearing can easily be deflected by a few tens of micron.