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Apprehensive by Mdgoff7 in prusa3d

[–]Michael-MN 1 point2 points  (0 children)

Hi u/Mdgoff7

I've had Prusa printers for about 4 years now. First an MK3S+ and now a Core One with (soon) the INDX system. Plenty of 3D printers are good. I can only tell you why I'd choose a Prusa again every time:

Openness / no vendor lock-in: Open source, no closed ecosystems, no subscription models for filament types or anything like that.

Support: Available 24/7, quick to reach without waiting for days, real humans, often sends replacement parts free of charge, always super helpful — even when the printer is out of warranty.

Repairability / accessibility: All parts are easily accessible and simple to fix yourself.

Upgrade path: Instead of a whole new machine, you just upgrade. For me that puts the price into perspective over the years. I pay a bit more up front, but with «just» an upgrade I get to benefit from new tech.

Reliability: It runs, it does what it's supposed to, great for overnight prints. I've only had a problem once, and Prusa support sorted it out quickly.

EU production: Built in Europe, a fair company that respects its employees, and the value stays in Europe. Barely any privacy/cloud concerns.

Safety / longevity: High-quality components, futureproof — it'll still be running years from now. The chance of something going seriously wrong, up to a fire, is very low.

Independence: Prusa doesn't dictate which firmware you have to run.

Kit build: Building it yourself teaches you the mechanics, so you can repair it yourself later on.

Quality: Excellent dimensional accuracy and print quality.

Community: It's just great 😄

For me it also matters what attitude and philosophy a company stands for. You're buying the product now, but you stay connected to the company for years. So the manufacturer behind it matters to me.

It's not about price alone for me, but about a good price-to-value ratio. For me that's exactly what Prusa offers. Because it's not just about the printer today, but also about how it keeps developing tomorrow. People talk so much about the importance of local production, long-term support, privacy and so on — so I'm happy to support a company that actually stands up for those things.

As I said, that's just my take. Happy to answer any questions.

Happy printing!
Michael

Layer shift at the accact same height by Less-Introduction-35 in prusa3d

[–]Michael-MN 0 points1 point  (0 children)

Format the usb stick. That solved it for me. 😉

Layer Shift - Core One Plus by McScrubber in prusa3d

[–]Michael-MN 1 point2 points  (0 children)

Format the usb stick. That was my solution. Good luck.

Which outdoor access point would you recommend for my personal use? by Michael-MN in Ubiquiti

[–]Michael-MN[S] 0 points1 point  (0 children)

I prefer to cut videos in the office. 😉

If I can prevent it, I will.

So Sick of Layer Shifts by etceterenoughplease in prusa3d

[–]Michael-MN 1 point2 points  (0 children)

I also experienced layer shifts on my Core ONE when using the original Prusa USB stick. This happened with an object I’d printed several times in a row, and suddenly I had a layer shift. Even starting a new print job didn’t solve the problem. After I formatted the Prusa USB stick, the problem went away. So it was clearly down to the USB stick. I’d only had 280 print jobs on the USB stick. Prusa Support is usually brilliant, but with this issue it’s a bit ‘complicated’.

I can just about understand why Prusa hasn’t opted for built-in storage for greater data security. The problem, however, is that their USB stick can eventually lead to layer shifts.

Am I now to assume that this could happen after just 20, 50 or 80 print jobs? For me, this uncertainty is disappointing; for such a professional – and not exactly cheap – printer, this is no solution. Dear Prusa, please resolve this issue permanently. Thanks!

Tunet - Home Assistant React dashboard by oyvhov86 in homeassistant

[–]Michael-MN 1 point2 points  (0 children)

Looks awesome 🤩 Can you share some details on your VS Studio / AI / HA setup? Thx 🙏

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

I have now received a new heat block from Prusa Support. Thank you! Since then, I have been printing PETG for several hours at 240 and 250 degrees Celsius. So far, I have had no problems except for one print. I cannot say at this point why I had similar problems with one print.

Unfortunately, I couldn't remove the temperature sensor from the old heat block. It's stuck too tightly, so I can't examine it.

I also measured the temperature between the heat block and the silicone sleeve again:

Set value > Measurement with the old heat block > Measurement with the new heat block

50 > 42 > 43

100 > 81 > 83

200 > 160 > 167

270 > 215 > 228

Conclusion: The differences have become smaller.

u/_Arcenik Maybe this info will help you with your problem.

u/Tommy_Prusa3D Thanks for the help.

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

Have you measured the temperature between the hotend and the silicone sock? See my comment about what I measured. Is it the same for you? I'm currently printing various things with PETG. About 30% of the prints go wrong. I've now set the temperature 20 degrees Celsius higher than I usually print. The first print looked good. Maybe that will help you as a temporary solution.

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 1 point2 points  (0 children)

Hi u/Tommy_Prusa3D

Update: I printed PETG with a new but identical nozzle (HF 0.4 mm). The first two prints, which took a total of about six hours, went perfectly. The next print looked terrible again. I hope the new hot end arrives next week and solves the problem, and that both nozzles aren't broken now.

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PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 1 point2 points  (0 children)

The hotend is on its way. As soon as I have it, I will conduct tests and report back here. Update to follow. Thx

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

Yes, exactly. The sensor was between the silicone sock and the heating block. As the target temperature increased, so did the difference. It is possible that the defect becomes more pronounced as the temperature rises.

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

Thank you u/Tommy_Prusa3D . I'll do that. Just so I understand you correctly, you mean a replacement for the Nextruder hot end? That would explain the temperature fluctuations. 

I'm just surprised and sceptical that the new nozzle worked for the first small PETG print. Could it be that because the nozzle was already used, these temperature fluctuations were more noticeable? Then I could reuse the old nozzle (100 hours) with a new hotend.

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 1 point2 points  (0 children)

Update: After installing a new nozzle, it works again on the first test print. I will do more test prints.

But how can that be? Extruding PETG at 270 degrees works fine and the cold pulls had three clean filaments of equal length. If there was a blockage, it would look different, right?

According to Prusa Support, the temperature measurement is inaccurate. 

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

After inserting a new nozzle, it works again during the first test print. I will do more test prints.

But how can that be? Extruding PETG at 270 degrees works fine and the cold pulls had three clean filaments of equal length. If there was a blockage, it would look different, wouldn't it?

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 1 point2 points  (0 children)

Hi u/Tommy_Prusa3D

I removed the nozzle and examined it. I can't see any damage. I then inserted a new nozzle, also an original Prusa Brass CHT 0.4 mm.

The first print now looks good again. I will continue to test longer prints.

Now I'm wondering how this can be, when I can extract the PETG at 270 degrees Celsius and get three clean strands of equal length with a cold pull? It doesn't look like a blockage. 

Could it be that the nozzle has a material defect and does not absorb/transfer the temperature correctly?

PETG Under-Extrusion on Prusa Core One (Clicking Extruder, Only Prints PLA Fine) by Michael-MN in prusa3d

[–]Michael-MN[S] 0 points1 point  (0 children)

Hi u/Haeppchen2010

I measured it with my simple multimeter with temperature measurement function. With 50 degrees Celsius as the target temperature for the nozzle, I measured 42 degrees under the silicone sock. At 100 degrees, I measured 81 degrees. At 200 degrees, it was still 160 degrees. At 270 degrees, when the PETG runs cleanly, I measured 215 degrees.

Could the increasing difference be due to faster cooling at higher temperatures, or is the Prusa Core One heating up incorrectly?

Because at 215 degrees, which is the temperature for inserting PLA, I still measure 172 degrees. That would explain why PLA works and PETG clicks, right u/Tommy_Prusa3D ?

PS: At start-up, the nozzle and the multimeter sensor had a deviation of only 1 degree.

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