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Grinding and Shaking of Z-axis on S5

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Posted · Grinding and Shaking of Z-axis on S5

hi, we are having some issues with the lead screw shaking/grinding against the base plate: seen in the linked video

What could this be and how would one go about fixing this?

As seen below it is an S5, with  8.1.3 firmware.

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    Posted · Grinding and Shaking of Z-axis on S5

    Check the rear spool holder.  It passes through the printer into the print volume right about where your problem seems to start happening.


    Also try sliding the base up and down by hand and see if there is a high friction spot.  Normally you want just a drop of grease on the screw.  Is there any grease on there?


    Things that can cause lots of friction:

    z screw, z nut, side rods, side bearings.


    If none of this helps I'd remove the z screw.  If you disconnect the cable going to the z stepper and unscrew the 4 screws holding the stepper under the printer I think it basically slides completely out (threaded rod attached to stepper).  I don't think the threaded rod can be removed from the stepper.  It's one assembly.  Once it's out you can check for friction on the side rods.  On rare occasions people have to replace the Z nut.

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