Re: AC noise on DC effect stepper drivers?

Jon,

Make sure that you know what the change of direction delay is for you
drivers. If your software is too fast for the drivers, you will loose
steps.

Bob Campbell

----- Original Message -----
From: Jon Anderson <janders@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: Wednesday, July 14, 1999 12:04 PM
Subject: [CAD_CAM_EDM_DRO] AC noise on DC effect stepper drivers?


> From: Jon Anderson <janders@...>
>
> My dad turned up something investigating our lost step problems and I
> wondered if anyone knows if the following can be a problem:
>
> Dad remembered that some full wave bridge rectifiers can leak AC into
> the DC output. He checked and found 43vac on top of the 43vdc we're
> getting out of our unregulated power supply.
> The power supply was built from schematics supplied with some CyberPak
> drivers I was using and consists of a transformer, capacitor, full wave
> rectifier, and bleed resistor for the cap.
>
> Can this AC be causing occasional lost steps? And even if not, is it
> something we really ought to filter out? (I'm assuming yes, but thought
> I'd ask)
>
> Thanks,
>
> Jon Anderson
>
> --------------------------- ONElist Sponsor ----------------------------
>
> Start a new ONElist list & you can WIN great prizes!
> http://www.onelist.com
> See homepage for details on ONElist's new "FRIENDS & FAMILY" program.
>
> ------------------------------------------------------------------------
> Welcome to CAD_CAM_EDM_DRO@...,an unmodulated list for the
discussion of shop built systems in the above catagories.
> To Unsubscribe, read archives, change to or from digest.
> Go to: http://www.onelist.com/isregistered.cgi
> Log on, and you will go to Member Center, and you can make changes there.
> bill,
> List Manager
>