Yaskawa servo options

dm17ry wrote: i've been using absolute encoders with MR-J2S-B's on my home mill for 10 year now... when i turn on the machine linuxcnc always comes up already homed. so i don't have a habit to rehome it. though it won't bring a slightest problem if i do it by accident or intentionally...

My absolute encoders aren't really absolute. What I have are single-turn-absolute resolvers and a bit of HAL that uses the position.txt file to work out where the axis really is.
Sometimes that file does not get saved, and I need to reset the system.

andypugh wrote: Typo. Should have been "your driver".

oh, ok. well, probably. i can keep motor motor offset in the amp eeprom or card's flash and output position which is 0 at home position. but already present motor-offset fit perfectly, so i thought it's a shame not to reuse it.. but i really like that now i have joints get homed automatically when amps say they are absolute. and unhomed when amps report position loss due to motor disconnection or discharged backup battery. seems like a natural behavior to me. what's the point of an open source software then if i have to give it up?

btw, in the latest J5 series mitsubishi finally came up with battery-less absolute encoders. i haven't seen any in person yet, but as far as i understand they are harvesting motor's EMF to power up encoder electronics when an unpowered motor gets rotated by an outside force. pretty neat. because usually when backup batteries discharge after a few years and users miss it - just the right time to completely forget how to re-home the machine

dm17ry wrote: [oh, ok. well, probably. i can keep motor motor offset in the amp eeprom or card's flash and output position which is 0 at home position. but already present motor-offset fit perfectly, so i thought it's a shame not to reuse it.

Can you give a link to documentation or code?

linuxcnc component description: yurtaev.com/nyx24.html
2.8 fork with my patches: github.com/yur7aev/linuxcnc/tree/nyx2.8
sample linuxcnc configs: github.com/yur7aev/linuxcnc/tree/nyx2.8/configs/nyx

Sorry, I got busy and rather dropped the ball on this one.

dm17ry wrote: linuxcnc component description: yurtaev.com/nyx24.html
...
"$ sudo apt install -t stretch python-gtksourceview2 # this package is missing in buster"

It is backported via LinuxCNC. If the LinuxCNC deb archive is configured then it should install from there.

2.8 fork with my patches: github.com/yur7aev/linuxcnc/tree/nyx2.8
sample linuxcnc configs: github.com/yur7aev/linuxcnc/tree/nyx2.8/configs/nyx

I am still fuzzy on whether your board and driver code will work on an otherwise unmodified LinuxCNC.

dm17ry wrote:

linuxcnc component description: yurtaev.com/nyx24.html
2.8 fork with my patches: github.com/yur7aev/linuxcnc/tree/nyx2.8
sample linuxcnc configs: github.com/yur7aev/linuxcnc/tree/nyx2.8/configs/nyx

I have a sgd7w servo drive and mechatrolink III control card. It’s possible to communicate with your comp over ethernet?

   

How do i buy this card an how much does it cost?
yurtaev.com/yssc3p.html

I see an email half way down the front page yurtaev.com/ with instructions to contact that email for purchasing cards.