[chbot] RS232 FILTER

[Martin Towers]

Is the RS232 directly involved in the CNC control.
If simply plugging in the RS232 disrupts the CNC then you have an earth
loop or an earth fault.

Martin


-----Original Message-----
From: Marshland Engineering <marshland at marshland.co.nz>
Reply-To: marshland at marshland.co.nz, Christchurch Robotics
<chchrobotics at lists.ourshack.com>
To: chchrobotics at lists.ourshack.com
Subject: [chbot] RS232 FILTER
Date: Tue, 25 Oct 2022 10:31:57 +1300

I have a CNC mill with a RS232 port. If I leave the cable connected to
the
pendant, any spike in the workshop upsets the CNC control. Turing some
things
on or welding etc. It is 40 years old so the internal caps may be a bit
dogy.
I was wondering where I could find a filter off the shelf (too many
other
projects to make new) that I can put in the line. Maybe something I can
easily
modify. It only works at 9600 baud so low bandwidth.  

Cheers Wallace


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