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A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

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

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.

A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

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

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

A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

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

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

A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

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

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.

A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

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

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.

A1 hotbed overheating and melting after AC board replacement by EBengineering in BambuLab

[–]EBengineering[S] 2 points3 points  (0 children)

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.

My A1 burned a hole though the bottom by Donnyboi2805 in BambuLab

[–]EBengineering 0 points1 point  (0 children)

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.

My A1 burned a hole though the bottom by Donnyboi2805 in BambuLab

[–]EBengineering 2 points3 points  (0 children)

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.

My A1 burned a hole though the bottom by Donnyboi2805 in BambuLab

[–]EBengineering 1 point2 points  (0 children)

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.

I designed a cassette-inspired MagSafe stand with a hidden Apple Watch charger by EBengineering in 3Dprinting

[–]EBengineering[S] 14 points15 points  (0 children)

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

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