Wayne wrote:

Hi,

I want to mount a VFD over the headstock of my lathe,
on the wall. This VFD comes with 1/2 knockouts so I
can cable directly to the VFD. My question is this
a safe place to mount the VFD as far as getting
splattered by any oil from the lathe?
VFD is rated @ IP20 (which I believe is about nothing).

Is there any RF issues that I should be concerned
about that makes mounting the VFD in an enclosure
desirable? I would assume the motor radiates more
noise than VFD would.

If I can mount it there without an enclosure,
then I don't need to remote the display.

Picture in the dropbox:
http://www.metalworking.com/dropbox/VFD_placement.jpg

Thanks,
Wayne D.

An induction motor is totally contactless (at least a 3-phase one is)
and contains no rectifying elements: it'll be about as RF free as
anything could be on an AC line. If the VFD generates RF and lets it
loose on the motor lines then the motor'll radiate -- but only because
of the VFD, not as a fault of the motor.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com