> Message: 7 > Date: Wed, 6 Feb 2008 18:05:51 +0200 > From: "Alex Joni" <[EMAIL PROTECTED]> > Subject: Re: [Emc-users] resolver/encoder converter > To: "Enhanced Machine Controller \(EMC\)" > <emc-users@lists.sourceforge.net> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > > These introduce a 50 ms delay in > > the feedback signal. Is this acceptable? I think, probably not. > > My question is this. Do I need to install encoders on the motors? > > Questions, thoughts, comments welcome. > > 50msec is waay too much, but reading the > http://www.amci.com/pdfs/accessories/RD141S_rev_1.0.pdf > I can't find it... are you sure it wasn't 50ns ?
The 50 ms came from a conversation with Matt in tech support at AMCI. I wrote it down as he was saying it. He said the converter was developed in concert with Rockwell specifically to replace the servo amp I have with a different servo amp. The converter had too much delay to work in the application it was being developed for. I will probably try to return them if they will not work. > > Regards, > Alex > > > > > ------------------------------ > > Message: 8 > Date: Wed, 6 Feb 2008 08:22:52 -0800 > From: Dave Engvall <[EMAIL PROTECTED]> > Subject: Re: [Emc-users] resolver/encoder converter > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > The Analog Devices 2S2105 resolver to digital chip with encoder > emulation shows a max latency of 125 us. > It is supposed to track at 1000 r/s. These are about $20 chips and > not the top of the line. > HTH > I will definitely check this out. thanks Stuart ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
