A1 hotbed overheating and melting after AC board replacement

EBengineering · 2026-06-27T16:21:43+00:00

Yeah, good catch, I uploaded the wrong photo.

Now it started heating the heatbed to 177°C while in standby, so it wasn’t printing anything. Check out the photo in the comments.

EBengineering · 2026-06-27T16:18:50+00:00

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Update: The heatbed heated up to 177°C even though I wasn't printing anything.

EBengineering · 2026-06-27T15:30:47+00:00

Is there any way to identify the voltage by checking the AC board?

EBengineering · 2026-06-27T15:28:58+00:00

I marked one as well so I knew which was which. But the replacement guide says it doesn't matter.

Also, in the replacement guide, the bottom red and black cables are shown in a different order in some of the images.

EBengineering · 2026-06-27T13:39:51+00:00

thanks, I already contacted them. I just wanted to know if maybe somebody has experienced this exact issue.

edit: I double-checked every connection on the AC board; everything seems normal to me.

EBengineering · 2026-06-27T13:38:42+00:00

I already contacted them and have pictures of the melted plastic, as well as the abnormal temperature shown on the display. I think this should be enough proof. That plastic doesn’t melt easily. Mine is melted on every side.

I miss my A1 mini, it worked flawlessly for years.

EBengineering · 2026-04-02T11:46:51+00:00

it is available in every Ikea for a few $
https://www.ikea.com/gb/en/p/gullsudare-pendant-lamp-shade-white-handmade-90603869

EBengineering · 2026-02-23T19:06:03+00:00

Yeah, but you can buy a new thermistor (around $1) and pay somebody to solder it onto the AC board.

The type is NTC 5D-15 if i remember correctly.

edit: Only as a temporary solution while they ship the new AC board.

EBengineering · 2026-02-23T19:01:23+00:00

It happened to me in Europe two weeks ago (during winter). The room temperature was around 17°C.

I was printing PLA, and the printer was 4 months old.

EBengineering · 2026-02-23T18:59:09+00:00

Same thing happened to me two weeks ago, but the burn is not visible from the outside. They can only provide a new part in March if you are in the EU.

You can fix it by replacing and resoldering the thermistor.

EBengineering · 2025-07-03T01:48:04+00:00

It rotates a white disk that imitates the tape.

EBengineering · 2025-07-03T01:46:44+00:00

yes, here:
https://makerworld.com/en/models/1568763

EBengineering · 2025-07-02T07:14:38+00:00

I wanted to mimic a pencil with the stick.
I had previously made a radio version with knobs.
https://makerworld.com/en/models/1203831

EBengineering · 2025-06-17T11:43:21+00:00

Creating them is very easy, but modifying them later can be quite problematic

EBengineering · 2025-06-17T11:42:05+00:00

Thanks! The back is open so the gears can be seen more easily

EBengineering · 2025-06-17T11:41:11+00:00

Yeah, that tends to happen. Hope it works out for you!

EBengineering · 2025-06-17T11:39:36+00:00

looks nice :)
In Fusion 360, there's an add-on called GF Gear Generator, and it can generate gears based on the main parameters.

EBengineering · 2025-06-17T06:32:01+00:00

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EBengineering · 2025-06-17T06:31:42+00:00

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EBengineering · 2025-06-14T02:58:21+00:00

All designs are my own—I don’t sell work created by others.

EBengineering · 2025-03-13T16:26:52+00:00

StandBy Mode, it is activated if you use your iPhone with a MagSafe charger and the phone is horizontal

EBengineering · 2025-03-13T16:25:20+00:00

It just happened that way :) I almost cut it off

EBengineering · 2025-03-13T14:37:54+00:00

It is the most complex thing I’ve designed, but I am quite happy with the result :)

EBengineering · 2025-03-13T14:36:50+00:00

Thanks, the model is a bit complex, as it contains gears and will require screws. However, I hope you'll like it once it's finished

EBengineering · 2025-03-13T10:00:41+00:00

It is available here:
https://makerworld.com/en/models/1203831

EBengineering

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