Servo jump error

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7 years 1 week ago #148765 by Alloy Craft
Replied by Alloy Craft on topic Servo jump error
Here is a better sample. This is 3 clicks in one direction while in the.0001 increment. I noticed that the motor jumped on all 3 clicks. The second photo is a close up of one of the clicks.



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7 years 1 week ago #148767 by tommylight
Replied by tommylight on topic Servo jump error
Maybe i missed something, but why is there :
motor.01..........
axis.2..........
Could you post the hall and ini files? And can you set the motor to run at a very low speed and do a plot of A and B channels of that encoder?
That sure looks like a messed up encoder in the video. Or just open it and check for rust. I did have such a case.

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7 years 1 week ago - 7 years 1 week ago #148768 by Alloy Craft
Replied by Alloy Craft on topic Servo jump error
Here are the hal and ini files. On the encoder what pins would you want to see? raw counts? The only reason I dont think it is the encoder is that the servo drive is not showing any errors. The Yaskawa sigma5 drive has on board monitoring and the first photo I show is from that software. The encoder signal to linux comes from the servo drive as shown below. On the photo I posted the reference speed incoming is going across the zero axis during on click in .0001 increment. I think this shows that the motor is following the reference signal ok? Correct me if im wrong but I dont think the reference speed should cross the 0 axis.



thanks

File Attachment:

File Name: hardinge_2...0-24.hal
File Size:14.44 KB


File Attachment:

File Name: hardinge.ini
File Size:5.73 KB
Last edit: 7 years 1 week ago by Alloy Craft.

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7 years 1 week ago #148771 by PCW
Replied by PCW on topic Servo jump error
can you try reducing the deadband?

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7 years 1 week ago #148799 by Alloy Craft
Replied by Alloy Craft on topic Servo jump error
Deadband was set at .00005 in the INI file, I dont know what the units are for deadband? Anyway tried reducing it to .000005 and still had the same results. I may crack into the motor today just to see if the encoder is dirty.

thanks again

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