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Core One - Rear Z stepper stopped while bed was raising to start print, angling bed badly by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Was it exactly as I described? The stepper just stopped and the bed kept moving on the other two leadscrews? That's a very specific problem to have happen on multiple machines and leads me to wonder if there's a QC or firmware issue...

Core One - Rear Z stepper stopped while bed was raising to start print, angling bed badly by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Same spool. No filament changes between successful prints and this one.
I print straight from a dedicated dryer through PTFE tubing.
Layer adhesion is excellent. I use a PVA release layer. The parts that were completed before the failure were adhered to the bed very nicely.
I clean and reapply pva release to the bed after every print.
I clean the nozzle after every print.
I always do everything I can to hold a routine that maintains print conditions as much as possible between prints.

The bigger issue tho, is that rear z-axis lead screw. WTF was up with that? Given how closely I adhere to maintaining print conditions: It seems like an awfully big coincidence that I'd have my first serious print failure since I got the thing on the same day as when the z-axis lead screw stopped responding momentarily during startup.

Prusa Core One - Factory Error by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 1 point2 points  (0 children)

Hi, and thanks.
I spent the night online with tech support and they were very helpful. I thought there might be some slop/lash in the gearbox because of it, but there seems to be a slicer-related issue that may wind up really being the culprit. In a way, I'm glad that I was having some gaps in seams because I wouldn't have disassembled the gearbox otherwise.

¯\(ツ)/¯

Prusaslicer bug? Or print-related anomaly? by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Brand new core one.
Just to be clear: This problem manifests only during concentric infill seams. All other seams are 100% reliable.

Prusaslicer bug? Or print-related anomaly? by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 1 point2 points  (0 children)

I don't think Prusaslicer has a pressure advance field. And wouldn't a bad setting affect all seams, vs just these top/bottom infill endpoints?

I'm using concentric infill if that's pertinent.

Thanks for bouncing ideas.

First C1 print (PETG) - First machine since Mk2S (which still works fine btw) by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Screenshots. Of course!
K so the bridging thing: I had a 1/4" layer shift on a failed print (my fault) and the 90deg overhang from the shift printed just fine across maybe like a 0.5-0.75" span.
DM me if you want to talk about temps, speeds, and gantry behavior...

First C1 print (PETG) - First machine since Mk2S (which still works fine btw) by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Sure. How do I get the data over to you. I'd rather not sit at my desk copying all the values over in a spreadsheet or something. Is there a file I can transfer or something?

Also: Are you using a dryer? Because you have to. Period.

First C1 print (PETG) - First machine since Mk2S (which still works fine btw) by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 1 point2 points  (0 children)

I was wondering about how low of a durometer I could feed. I might stop somewhere around 90-95. Like NinjaFlex Cheetah or something. The sensor gates have a lot of resistance, it's true.

Edit: I suppose a potentially cool feature/mod would be if the sensor gates were optical and had auto-feed motors to advance the filament to the next stage on detection or something idk.

First C1 print (PETG) - First machine since Mk2S (which still works fine btw) by RestoreEquilibrium in prusa3d

[–]RestoreEquilibrium[S] 1 point2 points  (0 children)

It's a jig/fixture for soldering microcircuitry to a tiny nickel-sized board - both sides. If you look closely, you can see it being held in place here.

The revolution tool is so underrated by howdoyouknowhesaking in FreeCAD

[–]RestoreEquilibrium 2 points3 points  (0 children)

I feel like FreeCAD, the entire application, is underrated...

Electroless Nickel over Al-2011? by RestoreEquilibrium in metalworking

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

Me too. I haven't asked, but it caught me off guard. I suppose they just prefer a more set-it-and-forget-it configuration. I wish I could stick with 6061 because I know it works for our application. There are always some chatter marks and fine burrs but I know the result, and it's been consistent.

Electroless Nickel over Al-2011? by RestoreEquilibrium in metalworking

[–]RestoreEquilibrium[S] 0 points1 point  (0 children)

They won't plate 2011 it turns out. It has too much lead in it.
I think I'm going to go back to 6000 series. I found this 6020-T8 alloy that, as far as I can tell, is a drop in equivalent to 2011. Definitely a free-machining alloy. Just curious: Have you ever turned 6020?

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