Mesa FPGA cards are so cheap now are parallel port cards worth it?
Dramatically better performance for not much difference in cost
On Tue, Dec 3, 2019 at 7:21 PM R C wrote:
>
> Hello,
>
>
> what would be a good PCIe card t use with linux-cnc, would any card
> that does ECP/EPP do?
>
>
> thanks,
On Wednesday 04 December 2019 03:25:20 Chris Albertson wrote:
> Mesa FPGA cards are so cheap now are parallel port cards worth it?
> Dramatically better performance for not much difference in cost
>
I'd argue about the diff in cost. A 5i25 is still about $60 more
expensive than an EPP parport, ca
Hi
I have been requested to convert a router that has Yaskawa Servo Packs
(SGD7S with analog and step/dir and encoders) already installed. The
installation makes use of the STEP/DIR signals currently but with no
encoder feedback.
I intend to use the Mesa 7I95 to replace the Chinese controlle
On Wed, 4 Dec 2019 at 03:21, R C wrote:
> what would be a good PCIe card t use with linux-cnc, would any card
> that does ECP/EPP do?
You might want to look at the Mesa 6i25. It's not a parallel card, but
it can behave like one.
The onboard FPGA can generate step pulses and count encoders at MH
There really isn't any issue I know of with using step/dir with encoder
feedback. (I currently am with a 5i25/7i85s combo.) And having the encoder
feedback can be nice for tuning the drives, if the drive's set up software
doesn't provide any internal "scope" feature.
Todd Zuercher
P. Graham Du
Marius,
You need to see what kind of encoder the Yaskawa motor has on it. I recall
many of them were serial w/ a proprietary Yaskawa protocol, which would
make it hard to run the encoder directly back to the mesa.
Possibly, the servo pack has an 'encoder out' feature that you could run
back to t
On 12/04/2019 10:41 AM, Mark Johnsen wrote:
Marius,
You need to see what kind of encoder the Yaskawa motor has on it. I recall
many of them were serial w/ a proprietary Yaskawa protocol, which would
make it hard to run the encoder directly back to the mesa.
Possibly, the servo pack has an 'enc
On 2019/12/04 18:41, Mark Johnsen wrote:
Marius,
You need to see what kind of encoder the Yaskawa motor has on it. I recall
many of them were serial w/ a proprietary Yaskawa protocol, which would
make it hard to run the encoder directly back to the mesa.
Possibly, the servo pack has an 'enco
Hi Marius,
When you hit Estop do the drives power down completely? If so, you might
as well stick with step/dir without encoder feedback. With step/dir the
only thing encoder feedback will do for you is let you track the
machine's movement when it is in estop. If the drives power down you
los
I tried the Machdrives card yesterday and it worked very well.
https://www.machdrives.com/brb.aspx
If I'm running step and direction, with linear scales, I was wondering if I
could parallel up the linear scales output to the PC so I could still use
LinuxCNC as a DRO. Can this be done?
Thanks Wal
Does anyone here have experience using "O Drive" for a machine tool
application? These were designed for use with robotics but it looks like
they are ideal for a high-performance milling machine. It is Open-source.
The firmware and hardware schematics are on GitHub.
https://odriverobotics.com
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