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Extruder Twitches when crossing mid bed
#1
My extruder twitches when moving only across the middle of bed. It happens during printing which limits my prints to the back half of the bed. It also happens when I do a extruder cleaning. Here is a video of what I am seeing.

https://youtu.be/cktmYazpxQ4

Anyone know how to fix this?
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#2
In the video it sounds like the chatter is coming from the right hand side. Is the belt missing any teeth or are any teeth damaged? Can you take a video of the right hand carriage when it's chattering?

There have also been some issues with the white idler wheel in the left hand carriage. Keith has a thread about it. Maybe try to get both sides on video? Might help diagnose.
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#3
try to move the extruder manually in same position when stepper are disabled to see if you feel some resistance also - the axis could be deformed in this area
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#4
I've tried to move the extruder manually with the controls and it does not make that sound. I've moved it by hand and I don't sense any binding or resistance.

Here is another video with the X-Axis motor. I will take more video in a little bit.

https://youtu.be/USz9oikePR0
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#5
Another video.

https://youtu.be/Na3x3He91zg
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#6
seems it happen in very specific point not before not after
did you try to power off your printer immediately when issue is starting ? so you get the right spot and move manually a little, X and Y very gently and slowly ? as movement speed must be low slow - high speed like jog may hide the problem
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#7
Found the issue!! I was probing around looking for the issue and remembered that I had to resolder some wires back together for the X-Axis optical sensor. Since I fixed that issue I never thought to check the wires again.

Turns out another wire from the x-axis optical sensor was binding. The wire did not appear bad but I moved it a little at a different extruder position that it usually had the issue and I was able to duplicate the issue.

I just cut the wire, resoldered it, and shrink wrapped it.

I think I may consider creating the wire chain in the future to prevent the issue.

Thanks all for the help!

http://youtu.be/3BsIaD3fJpA

Video right after the fix and sweet victory!
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