Rf-emi problems possible..arduino-ramps 1.4 October 23, 2015 11:36PM |
Registered: 9 years ago Posts: 121 |
Re: Rf-emi problems possible..arduino-ramps 1.4 October 24, 2015 02:12AM |
Registered: 10 years ago Posts: 14,672 |
Re: Rf-emi problems possible..arduino-ramps 1.4 October 24, 2015 03:18AM |
Registered: 8 years ago Posts: 5,232 |
Re: Rf-emi problems possible..arduino-ramps 1.4 October 24, 2015 07:21AM |
Registered: 10 years ago Posts: 466 |
Re: Rf-emi problems possible..arduino-ramps 1.4 October 24, 2015 08:43AM |
Registered: 9 years ago Posts: 121 |
Quote
dc42
The usual culprit for this sort of disconnection is current transients in the ground loop that is formed when you connect the 3D printer (or in your case the plasma cutter) to a PC through a USB cable.
To mitigate the problem, my usual advice is to power the PC and printer and nothing else from the same power distribution block, and use a USB cable with a ferrite bead on it. But your plasma cutter may be generating too much ground noise for that to be enough.
To eliminate the ground loop, instead of a mains powered PC you could use a laptop or tablet powered from batteries. Alternatively, instead of RAMPS you could use more modern electronics that provides an Ethernet connection and use that instead of USB. Ethernet provides galvanic isolation, unlike USB.
Re: Rf-emi problems possible..arduino-ramps 1.4 October 24, 2015 09:15AM |
Registered: 9 years ago Posts: 121 |
Quote
cat.farmer
Being a PC repair guy, my first thought was maybe it is just a dirty USB connection. It sounds like it / they worked for an extended period, and started to just recently fail? If it were EMI, I would expect that to show up quickly, unless something has changed in the surroundings. By putting a new PC in place and the problem goes away, just enforces that that thought.
Re: Rf-emi problems possible..arduino-ramps 1.4 October 25, 2015 12:44AM |
Registered: 14 years ago Posts: 128 |