Re: [CAD_CAM_EDM_DRO] Interesting Gecko project

Thanks / Danke Nicolas.
But anyway it is still way above my head. As dump industrial engineer no
wonder
you get to know a little of everything and nothing complete.

Pond Project: OT we have the hardes drought for 8 years and the thing I
thought would be a spring is simply soapy water from the same creek. Or
better said filtered sewage water from what was many years ago a creek.
My farm worker is shoveling now for 2 weeks. I will later filter the
water with a waterlilly treatment before it gets into the pond. This way
the animals will get at least some water. (Oxtoads I haven't seen for 6
years now. hopefully we get them back.)
Good bye
Sven Peter

Nicolas Benezan wrote:

>
> > Sven Peter wrote:
> >
> > > Hello Jon,
> > > As I understand
> > > Nicolas made a kind of mathcoprocesor for taking load from the PC and
> > > dosition backfeed.
>
> That's another project. I built a stand-alone CNC controller that has
> its own microprocessor and takes G-code as input (via RS232) and
> generates step/dir pulses for up to 5 axes as output.
>
> Jon Elson wrote:
>
> > Well, the GeckoFilter seems to be mostly an output filter (throttle came
> > out, when he must have said "choke" in the original, meaning inductor.
> > Also, engine comes out, when he meant motor.
>
> Yes, the translation is a bit flaky but amazingly good compared to some
> manuals I got for japaneese products...
>
> > It also seems to have some filtering and optoisolation for the encoder
> > signals. It took me a while to realize the board on top with the SMT chips
> > and discrete components is the Gecko Servo board without the case.
>
> No, it is not the gecko board, it's my own. I think I should come up
> with a real translation of the whole page, but for now, let me explain
> in a few words what the "GeckoFilter" does:
>
> 1. It does some filtering of the supply and motor lines (additional
> decoupling capacitor on the supply line, differential choke on the motor
> line to filter HF common mode noise plus some snubber RC networks). This
> is the board on the bottom.
>
> 2. The sensitivity of the encoder signals to noise problems is greatly
> reduced by transmitting them differentialy (twisted pair instead of a
> single wire for each phase A and B). This feature is implemeted with a
> small driver board which is directly mounted on the encoder (last
> picture) and a differential amplifier/receiver (left half of the top SMD
> PCB).
>
> 3. Easier driving and polling of the ERR/RES pin. Instead of one
> tristate bidirectional signal, the ERR/RES signal is split into two
> seperate ENABLE (to gecko) and STATUS (from gecko) signals.
>
> 4. The resolution and accuracy of a limit/reference switch is enhanced
> by logically combining the reference switch signal with the index output
> (one pulse per rev) of the encoder.
>
> 5. ENABLE, STATUS and REFSWITCH signals are optoisolated, so the PC or
> CNC-controller unit can be completely isolated from the motor/power
> circuit. (step and dir signals are already optooisolated by the geckos).
> Features 3-5 are on the right half of the SMD PCB.
>
> > Wow, a pond sounds like a big project!
>
> Huh? What do you mean with that?
>
> Ciao
> Bene
>
> --
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