Doug,
I've seen the responses from other stating it's "kind of OK as long as
you watch out".
Well, I can tell you it's not OK.
Use the cable for anything but steppers, servos, encoders, limit or home
switches etc.
I have seen problems even when the spindle's VFD signals and stepper
cables were all shielded - that's proper shielded Olflex cables
especially made for machine controls - and things like unwanted limit
switch triggers or steppers 'walking away' are not uncommon and very
hard to fix once you have everything boxed and ready to run.
Just last week I had some problems when I used an unshielded cable
directly connected to my Mesa 5i20 board to the E-stop. This was a quick
hack to see if I could use EMC's E-stop input. When the spindle started
running, at specific speeds, the steppers started rattling randomly.
A friend of me bought a commercial (hobby type) CNC controller and he
had lots of problems in this same direction - in the end he replaced all
his cables and fitted opto couplers on all the I/O lines - now his
problems are gone.
Regards,
Rob
Douglas Pollard wrote:
> I bought some cable to run stepper motors off of. I was told it was
> shielded. It is not. If I try to use this am I going to have problems
> caused by stray signals or static? Is it likely to be alright or am I
> looking for trouble??
> Doug
>
>
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