Thanks for the repiles,
I dont have any problems yet, because the system is just being wired.
I currently have wired the step and dir. lines and their drains are
terminated inside of a metal box that is shared with a breakout
board.
Only one end of the drain is connected and thats the end nearest the
breakout board. I believe this is correct , please let me know
if i'm wrong.
the encoder wires also have a drain that i was planning on running
inside of the breakout board metal box along with the step and
dir. wires, would this be the correct way to wire those?
when Ed refered to capacitive coupling, would that occur
between AC and DC wiring or DC and DC wiring?
thanks again
jeff
--- In mach1mach2cnc@..., Robin Szemeti <list@r...>
wrote:
On Saturday 06 March 2004 22:30, Ed Gilbert wrote:
Hi Jeff,
You should try to keep the signal and voltage wires as far apart
as
physically possible. If the wires do come in close proximity or
cross each
other try to do it at 90 degree angles, do not run them parallel
as this
increases capacitive coupling.
Although you are correct about the coupling, I beleive you are
fundamentally
wrong about the approach. If you have to keep your encoder wiring
phyiscally
separate from the motor drive wiring that is telling you that you
have got
something badly wrong with your shielding. The *correct* solution
is to get
the shielding right so it doesn't matter where you put the wires.
Any other
solution is just a sticking plaster waiting for a stray pulse to
come along
and upset things.
--
RapidCut CNC Technology
CNC Plasma Cutter
