StepperOnline A6 Servo

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16 Jan 2026 20:35 #341460 by tommylight
Replied by tommylight on topic StepperOnline A6 Servo
I would try using a new LAN cable, preferably CAT6
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17 Jan 2026 08:36 #341474 by andrax
Replied by andrax on topic StepperOnline A6 Servo
I use cat5e 1m and 0.25m.
Is that the problem?

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17 Jan 2026 12:52 #341481 by tommylight
Replied by tommylight on topic StepperOnline A6 Servo
Usually no, but i had new cables not work properly, occasionally.
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20 Jan 2026 16:41 #341613 by andrax
Replied by andrax on topic StepperOnline A6 Servo
Yes, you were right.
It was EMC problems.
I have now purchased CAT6 cables and made sure that no loops form. The error EtherCAT WARNING 0-1: Slave did not sync after 5000 ms has disappeared and I am currently having no problems with the Y-axis.

Thank you very much for the tip.
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21 Jan 2026 13:12 #341646 by TAKUYA
Replied by TAKUYA on topic StepperOnline A6 Servo
In the meantime, I was testing around with the HOME_ABSOLUTE_ENCODER = 2 setting in axis SIM. It turns out that there might be a positional accuracy issue when homing. Ive created a github Issue for it already. It seems like its reading the joint position and not the encoder position when setting the new home so on re-home, it shifts the axis location in software by your home-offset value while hardware remains the same.  

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23 Jan 2026 18:36 #341775 by andrax
Replied by andrax on topic StepperOnline A6 Servo
Hi,
What did you use for noise filters on the servos?
I can't find any information anywhere.

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23 Jan 2026 21:48 #341800 by tommylight
Replied by tommylight on topic StepperOnline A6 Servo
Ferrite beads on the motor wires near the drive are usually a must, and having an LC filter on the mains side never hurts.
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25 Jan 2026 15:47 #341897 by andrax
Replied by andrax on topic StepperOnline A6 Servo
Hi, I have now made some changes and am not experiencing any more problems for the time being.
1. I had Ethercat running on two network cards.
I have now combined them into one card and made sure that it has an Intel chip.
2. I have made the following changes in ethercat.xml: 
appTimePeriod="1000000" >>> appTimePeriod="2000000"
sync0Shift=“25000” >>> sync0Shift="50000"
Since then, the errors have disappeared and the servos are ready immediately.
3. I have attached ferrite cores to the Ethercat cables.
The ferrite cores for the servos have been ordered.

 
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26 Jan 2026 11:26 - 08 Feb 2026 13:41 #341929 by andrax
Replied by andrax on topic StepperOnline A6 Servo
Hi,
For your information.
Stepperonline recommends this noise filter for the A6 servos:
SCHAFFNER FN2090-16-16
 

Edit:
I have compiled the necessary information about the filters required depending on the servo size.
 
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Last edit: 08 Feb 2026 13:41 by andrax.

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07 Feb 2026 12:26 #342598 by Jugo2
Replied by Jugo2 on topic StepperOnline A6 Servo
Hey Guys, I’m pretty new here.
 I have a little Problem with configuring my Stepper online A6 Servo Drive. I want to use torque homing but I can not Figure Out wich Parameters I need to set in the Drive. 

And I also Think that my Linux CNC Config is wrong. Can maybe someone with more experience then me help me

Liebe Grüße
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