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Z nut trap wearing out?

Posted by Sardi 
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Sardi
Z nut trap wearing out?
November 29, 2014 08:59AM
I have just noticed that the nut in my z nut trap is moving a bit left-right, so it does not sit tight.
Also the rod is wobbling more than usual.
Does this mean that the z nut trap wore off a bit and is in need of replacement?

Edited 1 time(s). Last edit at 11/29/2014 09:05AM by Sardi.
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ormerod168
Re: Z nut trap wearing out?
November 29, 2014 09:26AM
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Sardi
..Does this mean that the z nut trap wore off a bit and is in need of replacement?

I would suggest that you dismantle the treaded rod and nut immediately, inspect it and if the is treads seems ok, give it a good clean and new lubricant - and replace the nut trap

And a new and longer nut in brass is highly recommended if you haven't changed that already

Erik
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Sardi
Re: Z nut trap wearing out?
November 29, 2014 09:45AM
I am replacing the nut trap as I type.
The rod was inspected and greased a couple of days ago, so thats taken care of.
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dc42
Re: Z nut trap wearing out?
November 29, 2014 12:51PM
I had to replace a Z nut trap because of wear. The last one I printed appears to be tapered as it is wider at the bottom than higher up. I'm not sure that this is deliberate, but it helps to prevent slop and allow for wear.


Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Sardi
Re: Z nut trap wearing out?
November 30, 2014 09:22AM
Not only did the Z nut trap wore out, but the nut itself was somewhat loose and could move in place (like when the ring on your finger is a bit bigger). The rod seems ok, so I just replaced the nut and it fits as it should on the rod.
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