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USB Hazard

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USB Hazard

Post by Mikael on Fri Mar 18, 2016 6:04 pm

Hi guys,

I got my Formaker yesterday.
Follows the instructions and found out that directly on power up with the USB cable connected I seller a burnt electronics smell. 
I quickly shut off the machine and started investigating.
Turns out the USB ground connection on the Atmel Mega8u2 chip had been damaged by an overload.

I suspect this is caused by incorrect grounding of the controller board but this is still unconfirmed.

As a warning Do not connect the USB cable before this is sorted. 

Has anyone been able to connect the USB without issues?

Mikael
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Re: USB Hazard

Post by Tony H on Mon Mar 21, 2016 10:44 am

Any way to test it whitout frying my computer?

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Re: USB Hazard

Post by Mikael on Mon Mar 21, 2016 11:28 am

Hi Tony,

I did not fry my computer. But that was Only thanks to "Mathieu VM" who warned us about this.
So when I connected the USB I was ready and on high alert to react quickly if I smelled any burning electronics.
So once the smell came I quickly shut the Formaker off and started to disassemble it.
Turned out that mine had not been damaged as much as "Mathieu VM" but I could clearly see the damaged lead. My PC seems fine, so thats good.

If you are as fast as I was then you might be fine, but there is a very large risk of things going bad.
Worst case I would say you can burn down your house.

Mikael
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Re: USB Hazard

Post by EddyG on Sun Mar 27, 2016 7:02 am

Hello!

I've red some comments on the Formaker Kickstarter page. Some people worry if USB Hazard is on all Formakers or not. 
Personally, USB connection works perfectly well and I use it to print with MakerWare v3.9 and MatterControl v1.5 (I don't use SD card).

Eddy

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Re: USB Hazard

Post by Mikael on Sun Mar 27, 2016 8:36 am

Hi Eddy,
That is Very strange.
Do you think you could post a picture of the area around the USB connector?
With that image I could possibly see the issue and fix it.
Regards

Mikael
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Re: USB Hazard

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