Problems with Lichuan Ethercat servo drive

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16 Sep 2024 11:51 #310251 by Erthenos
Thank you @Sandro for sharing the conf!
I can't belief how awesome this community is.

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16 Sep 2024 12:00 - 16 Sep 2024 12:03 #310252 by Erthenos
I don't have a machine to move yet, but what I can share is this:
cloud.niguna.ch/s/WgCiCZXoKDGboTY/download/poc.mp4
Last edit: 16 Sep 2024 12:03 by Erthenos.

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16 Sep 2024 12:07 #310253 by ihavenofish
Windows says I need to pay $1.29 to play that video... wtf. haha.

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16 Sep 2024 12:12 #310254 by Erthenos
Haha wtf XD
It's working for me... maybe try vlc¯\_(ツ)_/¯

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16 Sep 2024 12:23 #310256 by COFHAL
Could you explain to me how you calculated the position and velocity scales for each axis?

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16 Sep 2024 12:35 - 16 Sep 2024 12:39 #310257 by Erthenos
if you are referring to:
setp cia402.2.pos-scale 1677721.6
This is given by:pitch of your ballsrews / Number of Encoder pulses per revolution.
In this case I would guess:
2^23 / 5   = 1677721.6
i.e. this tells you how many encoder pulses you get per physical movement of your machine.
This would foe example be for an sfu2005 ball screw with a 23bit encoder (23bit = 2^23 = 8388608)
(I'm pretty new to all of this so please correct me if I'm wrong)
Last edit: 16 Sep 2024 12:39 by Erthenos.
The following user(s) said Thank You: Sandro

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16 Sep 2024 13:03 #310259 by ihavenofish
put it on youtube like a normal person :P (and so others will find it, its super hard to find anything on these motors)

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16 Sep 2024 15:48 #310265 by onceloved
Hello, thanks for sharing your configuration. I took a quick look and there is one thing I don't quite understand
net x-output <= cia402.2.velocity-cmd
net x-output <= pid.x.output
Is the direction above reversed? It should be
net x-output => cia402.2.velocity-cmd

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16 Sep 2024 18:14 #310276 by Aciera

Is the direction above reversed? It should be
net x-output => cia402.2.velocity-cmd

That is how I would do it but those directional symbols are for readability only and are ignored when the file is parsed.
The following user(s) said Thank You: onceloved

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16 Sep 2024 20:04 - 16 Sep 2024 20:12 #310282 by bertoldo
Good afternoon.

Using the example provided, I managed to get 1 motor to work... but in my case there are 4 axes. I have already changed the .hal and ethercat.xml and it doesn't work... I follow the example and it crashes again...
They start at 10ry, then I put the cable on and they go to 20ry.
then 1 88ry and the rest 20ry
Last edit: 16 Sep 2024 20:12 by bertoldo.

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