Re: [CAD_CAM_EDM_DRO] Re: How to convert a Grizzly 1006 Mill to CNC

Stephen has already responded, I am (maybe unnecessarily) trying to
spell it out.

The 48 psu is 48 volts, dc, Power Supply (Unit) . The capacity of your
power supply is related to the size of your motors. Basically, if you
have 3 200 watt motors, you need 2/3 * motor power (motor power = 2 *
200 watts) = 2/3 * 400 watts = 270 watts, quite small really.

A clean, safe filtered commercial power supply is a good choice, from
ebay, as 48 volts is common and cheap. If its a bit too big, don´t
worry, it won´t hurt anything (mine is 3000 watts !).
You can also make one. I use one I made for my mill (68 V). Its not too
difficult, but its more trouble than it´s worth, but not too difficult,
but a bit risky (dangerous) so ...
Seriously, my commercial supply´s don´t interfere with radio and tv
reception, have excellent grounding and low rf (radio frequency) noise,
so I recommend to everyone they buy one, as long as they can get one
near to their needs. This is the best option. If you are really short of
funds, build one, or you really, really need (want) 68 volts, or 78 or
something, buy all means build one. You are unlikely to achieve
filtering, smoothing, soft start, bleeder caps, failsafe against
short-circuit etc. Some people on these lists could make one like that
(I am not one of them), but its just not cost effective. If you just
need a big psu, build one of the 3 piece designs, I also use one, and
they work just as well, only with rf noise.
FWIW - I need about 7 power supplies so far to run my machines, and the
number is growing alarmingly ...

A breakout board is what the cable from your parallel port connects to.
It has buffering and isolation and terminals to connect your machines to it.
You can get one from cnc4pc.com (c1, c10) or from bob campbell (sound
logic), or from others.
I use cnc4pc cards, the guy who runs it, Arturo Duncan, responds well to
mails and supports his products, they are good and cheap.
e sound logic bob is also a known good product, with lots of satisfied
customers. No personal experience, but I would also recommend it as an
excellent choice, as they have large user base/review, no unsatisfied
customers, and were early on the scene.
You need one for b-o-b each parallel port.
I highly recommend a separate dual parallel port pci card in your pc.
About 10-20$. If it works, but 2 extras. You will want to have many
inputs, and thats the way to go. Cheap, easy, reliable. Using a
separate card is a much better option than your pc port. Your choice.
There are many excellent reasons for this, but your pc port will work
just as well.

Don´t worry about asking. A proper, polite question is usually treated
well, it´s only the questions like "how to I build a nuclear fusion
reactor" that get treated with silence ....

>
> Hi hannu
> Sorry for a newbie breaking in but what is "48 psu" and where can i
> find it and what does a breakout board do and where can I find those?
> Hope I am not posting wrong here but picking up knowledge where ever
> I can find it for my own build.
> regards
> perolalars
>
>