On Mon, 11 Oct 2021 at 22:34, Peter Hodgson <peterjohnhodg...@gmail.com> wrote:
> Interestingly, I noticed that the earth cable coming from the spindle VFD > screen made the encoder signal extremely noisy when it was in close proximity > to the encoder cable. Ah, yes, VFDs can make a lot of noise in the electrical supply, which can propagate through the system. It's a good idea to power the VFD through an input filter, this keeps the VFD noise out of the mains wiring. I might even have a spare one, but have a look on eBay for "Rasmi filter". Here is an example: https://www.ebay.co.uk/itm/250785925764 I had a lot of trouble on my first machine with ghost limit switch triggering. An input filter for the VFD helped a lot. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
