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Anti backlash nut adapter for the Ender 3

by registeredthing Aug 26, 2018
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do not mount the anti backlash nut upside down. If the directions of gravity and the spring tension are reversed, it can be counterproductive.

If it weren't for being counter-productive, I'd get nothing done :D

But I did mention that in the description.

Honestly, I'd recommend just taking a file to the nut and narrowing it along one side - that's all you need to make it fit with no adapter or extruder relocation needed

Like Regiatething said holes don't line up, allready tried cutting one side off. But the holes don't line up and I can't expand the holes more cause it will break out from the outside.

Sounds like I might have just been lucky with the anti-backlash nut I purchased, then - the bolt pattern was exactly the same as the stock one, just with two extra holes and a side that had to be filed down

Yeah probably then, cause mine don't line up. So I have made an adapter aswell.

Do you have the link to the one with holes that line up? IRRC, the one I used was similar to this one (may be it since I bought it as well as another on ebay):

Edit - I just checked the model, and the hole spacing for the anti-backlash nuts is 16mm (diagonal) or about 11.3mm between holes if hopping from hole to hole, but the mounting holes (for the Ender3 side) is 17.74mm (probably should have been 17.75mm). I will add that to the description.

Well, the model I bought is this:
But, if you look at the draft of it, the spacing is 16mm, as you mentioned. I saw in the drawing for the extruder motor bracket that the holes are oval shaped (centers 18mm apart) - not about to disassemble my extruder to double check, but between that, and manufacturing tolerances, I could see how I could end up with a bracket that a 16mm bolt spacing would be able to fit

Thanks, yep they look the same. Makes sense that the holes could fit with the holes being oval. If I were doing it again, I'd possibly just drill out the mounting holes on the brass nut, since it only needed 2mm extra. That may be the best way to go since it would not cause any loss of z-height and would not require drilling on the machine.

I don't disagree, but I think holes would also need to be drilled out either in the nut or the mounting plate. I use a titan aero so the relocation was no problem, and before I installed that, I had extended the mount for the extruder stepper, which made it easier for me to thread the flament. This is only one way to do it though, and I am definitely not suggesting it is the best way for everyone, or even necessary for most printers. Posted it since other folks may want to use it in a similar way (though hopefully they will be able to mount it correctly :-)