Thanks all for the advice. I now have plenty to try. I may just replace them
for something else though.
> On Aug 27, 2020, at 11:30 PM, Chris Albertson
> wrote:
>
> I have to admit most of my noise-hunting experience is with vacuum
> tube-based amplifiers. But the exact same techniques app
On 08/27/2020 11:57 AM, Matthew Herd wrote:
This leads me to the conclusion that either the supply somehow struggles under
load or the Geckos are introducing inordinate noise.
Geckos are known to be quite noisy. They are sending 72 V
square wave pulses at 20 KHz into the motor coils. Possibly
Hi Chris,
The frequency of the noise as measured on the ground appears to be a ringing
signal repeating at roughly 600kHz. I guess my previous measurement of 80kHz
was wrong. I’m not sure why it would be different. I’m not 100% sure that
it’s a consistent 600kHz, and might actually be severa
Can you measure the frequency of the noise? If this is a digital scope it
might be able to show a spectra. Lacking that you can eyeball-estimate the
period or width of any spikes.
The other bit of information we don't have is how the wiring is laid out.
Best practice would be to use tightly twis
I spent some time the week before last investigating the noise issue that I’ve
been having on my Bridgeport BOSS mill. The system architecture involves a
single phase 240V input, which powers a VFD for the 2HP spindle motor, a 120V
step down transformer to power some devices on the machine (spr
