USB cable burnt March 01, 2016 08:21AM |
Registered: 10 years ago Posts: 25 |
Re: USB cable burnt March 01, 2016 08:52AM |
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Re: USB cable burnt March 01, 2016 10:22AM |
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Re: USB cable burnt March 01, 2016 10:33AM |
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Re: USB cable burnt March 01, 2016 01:02PM |
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Re: USB cable burnt March 01, 2016 01:57PM |
Admin Registered: 16 years ago Posts: 13,906 |
Re: USB cable burnt March 01, 2016 03:05PM |
Registered: 10 years ago Posts: 14,672 |
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aj.moreno
Hi dc42,
really what you say make sense, and more if I take account that I had been working correctly with the pcb until, suddenly, one day I connect the USB and the power source and the USB cable was burned. And this matched with the machine was carried to another place. However, there is something missed, and it is that the pcb consumes aprox. 15mA when it is turned on, and it is strange that this current is able to burn the cable and crash the computer. Any suggestions?
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aj.moreno
Regarding to your description, what is your advice to protect the USB cable and the computer?
Re: USB cable burnt March 02, 2016 04:31AM |
Registered: 10 years ago Posts: 25 |
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... some (cheap chinese) PSU's are internal not proper wired to mains ground, so the GND-potential of the PSU and the GND-potential of the PC can be some Volts to some ten Volts off.
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As you say, 15mA load would not do that. Are you sure that you didn't have the bed heater operating, perhaps unintentionally, when the USB cable got hot?
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* Make sure that the 0V connection between the PSU and the electronics is sound
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* Plug the PC and the printer, and nothing else, into the same mains distribution block (preferably a surge-protected one)
* Use a USB cable with the ferrite bead on it
Re: USB cable burnt March 02, 2016 11:37AM |
Registered: 10 years ago Posts: 25 |