Thread: VFD interference problem
Have you tried a new pp cable yet?..Clive
Is there a reason why you don't have an RFI filter on the VFD power lines close to the VFD?
Well, after trying to sort things out again with Graeme, we came to the conclusion that there was no ground loop. The PP cable is straight through, and there is nothing wrong with the 0V connections. So, I decided to take everything out of the control box, and next week I'll wire it step by step and check for interferences at each step.
I need to find one first. Probably going to get a bigger cabinet so I have more room to work with. But beforehand I need to make things work.
I would power your VFD from a RFI filter such as this one http://www.ebay.co.uk/itm/RASMI-14A-...YAAOSw~OVWyKNV and put ferrites on your PP cable at each end - like these http://www.ebay.co.uk/itm/20-Pcs-Gra...oAAOSwCypWpz6J but you won't need 20 of them and you have to get ones that fit the cable.
Anyway - general question - Anybody know ? - do the better quality VFDs have RFI on the mains input ? and do the Chinese ones not have it ?
Hope this helps,
RobIt takes all sorts to make a world, I am just glad I am not one of them.
My Teco did.
It would trip the RCD in the 32amp wall socket though. It had an option to disengage it by snipping a wire.www.emvioeng.com
Stocking more goodies than just Smoothsteppers
Not related to interference but for safety - I was just looking at the 4th photo in post#1 ('dsc_0004.jpg') and noticed that the blue and brown cables going to the toroidal power supply appeared to be connected to incoming cables using male/female spade connectors. There looked like there was exposed metal on at least on of them.
If they are indeed the mains supply cables I don't think this is a good idea. Either put some heatshrink over each joint, or better still solder the cables together, heat shrink each individually, then heat shrink over both.
My ABB has one but like George it tripped the RCD. Thou mine was easier to disengage it was just remove a screw.
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