10v control mode. Gap around 0v

[Brodjaga]

Hello.

Preconditions:

I have a not good AASD-30 servodriver. He is connected to kflop + kanalog.
In +-10v control mode after power enabling and clicking to Init button the servomotor jerks.
First video.


Timeline:
3s - init
8s - stop
13s - init
25s - stop
29s - rotation
31s - rotation
42s - rotation
43s - stop

Right after turning on the power the engine does a jerk for a second, after that it is not on hold (makes a small rotation around zero position)

The only one way to hold servo motor is to set Pn161 and Pn162 settings to 20 and -20 respectively.
Screen from documentation

AASD-30 doc

But after this settings the servo motor sounds like he dies after I started the program.
Second video.


If 10v wires doesn't connected to the one servodriver the servomotor rotates at a speed of about 50 rpm. When they doesn't connected to second servodriver the servomotor rotates with speed about 22 rpm. Speed ??can vary due to incomprehensible reasons.


Question:

I want to know how to set gap around 0v.
Range -8v to -0.2v, 0.2v to 8v instead of range -10v to 10v

If it is not possible, could it be fixed in some another way?

Thanks.

[TomKerekes]

Hi Brodjaga,


Sorry I don't really understand the issue.

Are you concerned about analog offsets and drift? That shouldn't be a problem once the servo is enabled. Have you tuned/tested your Axes? Adding deadband into the servodriver is probably a bad idea.

You might read this wiki article.

Regards

[Brodjaga]

Tha problem was that the engine made small movements around 0 position when movement signals were not sent (kflop was connected and "initialized").

The problem was solved by fixing ground connection for all components.



Thanks.