Question about using Deadband in calibration when switching from Position to Spe

Hello everyone,I have a question regarding the use of deadband in the calibration function.I am using a Delta servo motor. Previously, I ran the servo drive in position control mode (pulse train input), using a Mesa 7i77 for feedback control. In that setup, setting the deadband to 0.003 worked well and the motor was able to stay still without hunting.Recently, I changed the servo drive mode to speed control using ±10 V analog input, because I expected smoother motion compared to pulse train control (this was suggested to me earlier). After that, I modified my HAL and INI files to use analog ±10 V output instead of pulses.The problem is that I can no longer get the motor to stay still using deadband.When I apply any value to the deadband, the value of joint0.f-error immediately jumps to the deadband value, and the motor still shows oscillation near zero error. It feels like the deadband is not helping at all—in fact, it seems to make the behavior worse. The motor still dithers or ripples at the error endpoint.My question is:

• Is deadband supposed to be used differently when operating in speed control (analog velocity mode)?
• Is this behavior expected, and if so, what is the correct way to achieve a stable standstill in this mode?
• Should I avoid using deadband entirely in this configuration and rely on other parameters (PID, FF terms, output scaling, etc.) instead?

I would really appreciate any guidance or suggestions on how to properly tune this setup.Thank you in advance.

 
 
 

Thnk you , for fast respond
Today I try again with your advice I and D change to 0 and clear all paremeter in calibration box
again its not help
now
X axis
P 17 , I = 0 , D = 0
deadband same result can't touch
I try re config FF0 FF1 FF2 but not any change
now FF0 = 0 FF1 = 0.04 FF2 = 0

but there is still a slight vibration/noise at standstill that I cannot get rid of yet.

FYI : DELTA ASDA-A3 750w

Thank you again for your help.
Asis,

my calculation of the DEADBAND value:

pid_setup["DEADBAND"] = round(1 / abs(joint_config["SCALE_OUT"]) * 2, 4)

works for me