Re: [Emc-developers] Yaskawa Mechatrolink PCI card.

[andy p. <bod...@gm...>]

On 30 September 2013 13:04, petr ruzicka <RU...@ro...> wrote:

> I've bought some Yaskawa Servacks for a gantry mill I'm planning to build, however didn't noticed until yesterday that the +-10vDC option for control is no longer available. Is Mechatrolink an option for control on EMC2 ? didn any one implement it?

I don't think that it is directly supported. However I don't think it
would be too hard to roll-your-own driver.

There is a fast serial UART module available in the Mesa card Hostmot2
firmware, and I think (but you would need to check with Mesa) that you
can connect RS-485 to the terminals supplied for smart-serial cards on
(for example) the 7i76. (I have an SSI laser rangefinder connected to
my 7i76 at the moment, using a custom firmware with the SSI firmware
module replacing that Smart-Serial.

I have also written a sample driver component for the UART, written in
the "comp" preprocessing language, which would be a reasonable
starting point:
http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=src/hal/drivers/mesa_uart.comp;h=be8bf84d4d649f7eb756df6641457ba00fa52631;hb=HEAD

This is just one option (that I have used for fast realtime comms
between an Arduino and a Mesa card). There are almost certainly many
more ways to the same end.

(Thinking about it, I could almost certainly expand the
packet-definition scheme used by SSI / BiSS / Fanuc to support
arbitrary serial UART packets too, I just have to allow output pins
too.)


-- 
atp
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