Kirk,
what you see on Ebay is last years technology. Personally I would see if
the SERCOSII interface cannot be
stripped out of the drives and wether they can be used with a 0-10V
interface.
Kollmorgen drives for instance have that possibility.
I know it sound strange after my comment earlier, but SERCOSII is an old
beast that works, but only just.
once it gets sick it takes a lot of doctors to get it right. I believe it
has to do with wether you wear your rabbit's foot
in your left pocket or your right pocket, but I never found out which.
Further The drive software will have to be either reverse engineered or we
have to buy the spec from the sercos organisation.
Even the interface chip to the serial link has only partially published
specs. The rest is to be bought.
SERCOSIII on the other hand has GPLed software on sourceforge, and it used
ethernet, probably
because of market pressure from Beckhof.
j.
On Thu, Mar 29, 2012 at 11:31 PM, Kirk Wallace
<[email protected]>wrote:
> On Thu, 2012-03-29 at 07:15 -0700, Peter C. Wallace wrote:
> > On Thu, 29 Mar 2012, Jan de Kruyf wrote:
> ... snip
> > > Quite correct, not until you would like to see something running / use
> LCNC
> > > to actually retrofit a machine.
> > >
> > > On the one side you need a modern drive interface for a high-speed
> machine
> > > (the market this development
> > > is aimed at)
>
> > Actually I rather doubt this. Can you explain why this would be?
> >
> > I directly connected PCI/PCIE card can have much better latency than any
> of
> > the serially connected drives (loop rates in the 100s of KHz are
> possible (we
> > are doing this now)
>
> At first I thought the Sercos market was beyond the LinuxCNC market by
> quite a bit, so I searched Sercos on eBay and there are plenty of used
> Sercos I and II PLC's, drives and PCI cards in the low hundreds of US
> dollars. I suspect machines using Sercos drives, waiting to be
> converted, will be coming to the list in the not too distant future, if
> LinuxCNC can convince owners that it is worthy of a $10,000+ well used
> machine.
>
> --
> Kirk Wallace
> http://www.wallacecompany.com/machine_shop/
> http://www.wallacecompany.com/E45/index.html
> California, USA
>
>
>
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