Re: [Emc-users] Ethernet with EMC2

[Frank T. <fr...@fr...>]

If you're set on ethercat, you may want to look at an ethercat module
like...

Hilscher COMX-CA-RE
http://www.hilscher.com/products_details_hardware.html?p_id=P_4579e8138180c&
bs=15

Beckoff fb11xx http://www.beckhoff.de/english.asp?ethercat/et1100_et1200.htm

They are drop in modules available with/without the firmware.

I'm sure they're expensive too.

Frank


> -----Original Message-----
> From: Viesturs Lacis [mailto:vie...@gm...]
> Sent: Wednesday, 9 February 2011 8:46 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Ethernet with EMC2
> 
> 2011/2/9 John L. Craddock <joh...@xi...>:
> >
> >> -----Original Message-----
> >> From: Jon Elson [mailto:el...@pi...]
> >> Sent: 09 February 2011 13:09
> >> To: Enhanced Machine Controller (EMC)
> >> Subject: Re: [Emc-users] Ethernet with EMC2
> >>
> >> Viesturs La-cis wrote:
> >> > Guys,
> >> >
> >> > what do You think about these two?
> >> > http://www.enclustra.com/en/products/fpga-modules/mars-starter/
> >> > http://www.enclustra.com/en/products/fpga-modules/mars-mx1/
> >> >
> >> >
> >> So, that's $500 US to get an FPGA on the ethernet? Yishin is right,
> >> expensive.
> >>
> >> Jon
> >
> > From what I can find out, etherCAT is a proprietary development of
> Beckhoff in Germany that only appears on the surface to be open.
> > The catch is the requirement for special slave devices that come in the
form
> of ASICs or node-limited IP cores for FPGAs.
> > Seems odd to consider it for open-source EMC2. Please correct me if I am
> wrong.
> 
> Thanks for the opinions!
> I totally agree that it is pricey, compared to other alternatives for FPGA
cards
> from Mesa or other sources. On the other hand, I do not feel it that
pricey,
> when the machine requires one such item to be used with several servo-
> amps, costing the same amount for each of them and also having several
> servo motors also costing approximately the same. So cost of this thing is
> pretty small, when compared to cost of all controls and motion hardware.
> 
> I am convinced that many of EMC users have hardware that cannot be
> considered as opensource. Including my ServoStar 601 servo amps.
> My personal feeling (not supported with any facts, numbers or other
> data) is that also Mesa or Pico Systems products contain some proprietary
> components.
> So I do not see a problem here - if that solution is working and
delivering
> expected performance, then I consider the price to make decision.
> EMC is meant to be smart CNC controller to work on simple, not-that-smart
> ("dumb") hardware, so I think it is acceptable to have proprietary
elements in
> hardware as long as it is fully configurable to fit each particular
machine and
> situation.
> 
> Viesturs
> 
>
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