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This is a retainer for Eckerput's Z knob for the Z stop. I had typed out a whole description and stuff but Thingiverse didn't save it. so you'll have to figure most of this out yourself.
Decide if you want to print out the one with the notch space for the X motor (Z knob support.stl) or the one without. the one without would require you to notch out the space yourself which means you can remove less material. Its your choice.
Print Eckerput's Z knob http://www.thingiverse.com/thing:40078
Print the Z retainer
Drill out the hole to smoothly fit the knob shaft. i used 11/32"
There should be enough mis-alignment to provide some spring pressure to keep everything tight.
Z knob retainer for Eckerput's Z knob for Printrbot by plexus is licensed under the Creative Commons - Attribution - Share Alike license.
So what's this mean?
We're sure plexus would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!