Re: [CAD_CAM_EDM_DRO] Insulating D-shell from chassis?

Hi Randy,

There should be no reason to insulate a DB connector shell from it's
chassis. Unless the cable has a shield that is connected TO the shell,
there won't be a connection anyway. Have you metered your chosen cable
for continuity between both shells?

Both chassis should be at ground (power cord green), and there shouldn't
be any current.

Do you think you're having problems from this? Check on the SherlineCNC
list, there was a discussion a week or two ago about R/C filters on the
input pins to the Xylotex driver board. Jeff specified R/C components
for filtering his board, and Bryan even laid out a PC board for an
inline filter.

Alan KM6VV


zephyrus@... wrote:

>
> I'm building chassis for my Xylotex controllers, and I need to insulate the
> female D connector from the chassis to prevent a ground loop in the signal
> path.
>
> Does anyone have a good/elegant way to do this? My choices seem to be to:
>
> 1. Inlet a piece of non-conductive material in the front panel and mount
> the D connector to this.
>
> 2. Use an all-plastic D connector (without metal grommets at the mounting
> holes) and non-metallic mounting hardware.
>
> 3. Mount the D connector as usual, and cut a piece out of the parallel
> cable shield adjacent to the driver box end. Since the cable is
> pre-terminated, I can't get a piece of heatshrink on it and would need to
> use electrical tape.
>
> All 3 ideas sound kludgy to me. Any suggestions/experience?
>
> Thanks,
>
> Randy