Re: [CAD_CAM_EDM_DRO] Using switching power supplies

Switching supplies are commonly designed to supply current to a steady load.
Chopper type stepper drives draw current in a very unsteady manner. This can
cause the regulation circuitry fits. Jon Elson (I think) posted a pretty
good technical over view of why it can be a problem. It can also work right
out of the box in the right circumstance and at other times be made to work
with the addition of capacitors and/or resistors. I personally recommend
that beginners just use a linear supply (transformer, rectifier, capacitor)
to start with because it eliminates the possibility of problems. When you
are starting and most likely to experience erratic behavior using a linear
supply is a good way to factor the PS out of the possible problems.

Tim
[Denver, CO]

----- Original Message -----
> Some time ago someone mentioned that switching power supplies could
> be troublesome in CNC tooling. Why? As long as the supply is not one
> of those that requires some minimum current, why would it matter?
>
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