We have a Kobra Max here at the office and it has developed a couple of weird quirks.

Issue 1

If you go into the menu and tell the printer to run a levelling check......it puts up that screen that says to touch something metal to the hot end to begin the process. Nothing EVER happens. This used to work.

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Issue 2:

When printing, the extruder grabs filament JUST FINE. But if you try to tell the printer to either FILAMENT IN or FILAMENT OUT when doing a filament change, the extruder does not engage and pull filament in or out.

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I'm so confused.

So I bought the Ender 3 S1 when it first came out. It has been great. I have spent the last two years printing with it all the time. It has been a ton of fun. I do regular maintenance on (tightening belts, swapping nozzles, cleaning and apply dry lube to the Z lead screws).

I set up a print the other evening. It started to level the bed and I went to sleep. When I came down in the morning, there was nothing on the print bed. I assumed that the filament had broken and the runout sensor had tripped. But that wasn't it. The UI screen was dark. I could see one of the print head fans spinning. I could hear the power supply fan spinning.

I figured maybe it just needed a reset. So i turned the printer off. Unplugged it for several seconds and plugged it back in and then turned it back on. Fans all spun up. But no movement and nothing on the UI.

Not sure what to do. Replacement main board is ~50. Replacement UI board is ~40. But a brand new S1 is only $179 at microcenter. Or a new, faster Ender 3 V3 SE is about the same price.

Does anyone have any troubleshooting tips for diagnosing the issue?

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I have the upgraded all-metal hot-end sprite extruder on my Ender 3 S1.

I am currently trying to print with some PETG (Overture Clear).

I'm running through all the normal calibration stuff (since this is my first time printing with PETG) using the Calibration Shapes plugin on Creality Slicer.

First up is the temperature tower......

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The bridge part between the two columns....it looks like CRAP on every temp. Like the bridge is too thin. There are gaps / sags, etc.

Which test should I try to run next to try dialing this in?

I've printed a lot over the past year with regular PLA and have had no issues with this test. Nothing ever like this when printing the temperature tower.

Hello all!

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I have had my Ender 3 S1 for a while. I've been upgrading it over the past couple of months (silent fan mods from Nathan Builds Robots), a Fulament Bed, etc.

I have a question about the included power supply....

I have noticed that when I have a light plugged into the same surge strip as my Ender 3 S1 I can see flickering in the light as it is printing. Starts as soon as the hot end starts heating up. I know this is from conducted emissions being kicked back onto the power line. My question is, would upgrading to a real Meanwell power supply fix this? Should I put the printer on a UPS to help quiet down the emissions?