Re: [CAD_CAM_EDM_DRO] Cables

I just went through this on my CNC Taig mill, so I think I can give you some
advice. I originally had my steppers wired up through regular 8-pin molex
plugs, the cheap kind, like you'd find inside a computer or something.
However, these connectors would occasionally come momentarily unplugged,
causing a fault and shutting down the axis. This lead to undesirable
results (such as destroyed engraving, etc).
Originally, my plan was to replace all of the connections with screw-type
MilSpec connections, similar to the ones sold under the Amphenol brand
(although I was going to use military surplus ones instead of new).
However, my favorite electronics surplus (HSC/Halted in the SF Bay Area) had
an iffy supply of the connectors in the varieties I wanted. In particular,
they had a large supply of panel-mount connectors, which are not what you
want for connecting to a cable. Finally, they are expensive, running $10-15
per connector, and you need 6 for a 3-axis system (since you need two halves
for each axis).
While I was at the surplus, I found and purchased several sets of Jones
plugs, which are a higher- capacity and tighter fit sort of plug. They do
not physically lock like the screw-type Amphenols, but they are very rigid,
and do not appear to have glitches. They lso have a higher anperage rating,
and are available in a quite wide range of sizes and numbers of terminals.
They are also polarized to avoid misconnections. See *
http://tinyurl.com/378kdr* <http://tinyurl.com/378kdr>* *I used a 12 pin
version for my 8-pin steppers, with some pins unusued.
Let me know if you have any more questions
Michael

On 9/1/07, ronald_41 <ronald_41@...> wrote:
>
> Nowhere, have I seen it listed, throughout all of the various forums on
> CNC Routers. A discussion on the pro's and con's of various cable types.
>
> Since I've purchased all of the required hardware components for my CNC
> Router project. And I've purchased a portion of the electronic
> components. I'm left with deciding how to wire up my 8-wire steppers.
>
> What type of cable end would be the best, considering that it needs to
> have a locking feature as well as strain relief? I have no desire to
> wire up the motors directly as the machine has to be portable.
>
> What would be considered the optimum in cabling considering it is
> required to provide EMF shielding, flexibility and low resistance while
> transmitting a moderately high dc voltage with a low amperage?
>
>
>


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