Thanks Andy,
I have a Schaffner FN2030-10-06 input filter on the VFD supply.
It became apparent I needed that when I was trying to run Ethernet over
the workshop power lines and it dropped out everytime I ran the spindle!
Pete
On 11/10/2021 23:51, andy pugh wrote:
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.
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