RE: [CAD_CAM_EDM_DRO] Question on power supply

Ripple current is:
1 - a fact of life
2 - not to be considered something that has to be eliminated.

It is also not static like we discuss it. In reality if you have n
drives connected to a power supply (a nice heavy lots of iron linear
one) the ripple current is going to vary as the current draw of the
drive varies. More draw = more ripple.

Don't get hung up with thinking it has to be zero or you will be
spending a lot of money on capacitors that you really do not need. As
long as the drive is able to supply the logic with a smooth power feed
it will be happy. The large current draw will be from the motor and it
could care less about a 5% ripple. I have even used supplies that
probably had 25% ripple and the drive and motor worked fine. It was not
something I used long term, but it was the cap I had handy when I was
testing.

Tim
[Denver CO]
Remember, we ain't building rockets or nuclear reactors. To get a
machine running and start learning about CNC most of this stuff is just
not all that critical.

> -----Original Message-----
> "".12 volts
> > divided by 24 is 0.5%
> > ripple - pretty good! As has been mentioned before
> > steppers and servos
> > aren't fussed by a small amount of ripple voltage.""
> how is the gecko going to like it though? thats my
> concern. and this sint jim.its kayla. and i guess i
> shouldnt have cut into this topic...oops