Supports are just a little bit too small to print reliably over many runs

[nhendin]

I am finding that the supports on the v1.2 are just a little thin at the base to stay down reliably, some lift and others are fine. I've printed ~30 of the RC2 version of these parts without incident on this same printer / slicer settings and all were fine, but the first 2 of the v1.2's had problems. Note I didn't re-do the supports myself, I used the included ones. Perhaps fatten them up at the base just a little, like a brim around the base of the crescent for 1-2 layers?

Note the good and failed support in this photo.

[hzeller]

Just updated that to have a little 'baseplate'. Can you verify that this works for you ?

[nhendin]

Henner,

Will check when this run of an RC2 is done. Thanks! Sorry for the trouble.

--Neil.

On Sat, Mar 28, 2020 at 12:31 PM Henner Zeller notifications@github.com wrote:

Just updated that to have a little 'baseplate'. Can you verify that this works for you ?

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[hzeller]

No worries, I am happy to work on making the process more robust for all circumstances.

[nhendin]

Updated version printed perfectly. Supports were well anchored to build plate but also easy to remove from model. Well done, and thanks for the quick turnaround.

Note I also cleaned and re-prepped the PEI sheet on my Prusa i3, which may also have helped, but I think the model is now much more robust to adhesion issues which is great.

Thank you!

[hzeller]

So in the first iteration, I've just added a solid layer as a 'foot', but I found that this was sticking too well on my printbed - while everything was already, that requires some manual scraping.

So I am considering changing it a little so that it is still larger, but not entirely filled.

Does this look reasonable ?

[hzeller]

(only slightly related: I notice you use the structured Prusa sheet; if you have, try the flat one, I found that that is usually much better in adherence for small structures)

[nhendin]

Interesting. I don't have the flat sheet unfortunately, but when they come back online for parts orders, I will get one!

--Neil.

On Sat, Mar 28, 2020 at 7:52 PM Henner Zeller notifications@github.com wrote:

(only slightly related: I notice you use the structured Prusa sheet; if you have, try the flat one, I found that that is usually much better in adherence for small structures)

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[nhendin]

I think that might work OK as well, I was able to get them off the textured sheet easily, so perhaps it's a function of what sheet you have? If you want I can test it. I have a git checkout of the repo from github so feel free to push that (or on a branch and I'll run it after this job finishes).

I am currently printing another run of your footed support version and it's working perfectly.

--Neil.

On Sat, Mar 28, 2020 at 7:01 PM Henner Zeller notifications@github.com wrote:

So in the first iteration, I've just added a solid layer as a 'foot', but I found that this was sticking too well on my printbed - while everything was already, that requires some manual scraping.

So I am considering changing it a little so that it is still larger, but not entirely filled. [image: wider-foot] https://user-images.githubusercontent.com/140937/77838190-6d9e2c80-7126-11ea-81f7-4072a1144562.png

Does this look reasonable ?

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[hzeller]

I sent you the STL that only prints a column in the Prusa slack in that one thread; you can use that directly if you want.

[nhendin]

Just printed a grid of 20 of them at various points on the bed. All well adhered to the textured PEI sheet on this printer:

[hzeller]

Cool. So I'll continue with this one then.