Cobblebot - Reducing play in the linear assemblies

My brother Chris and I have noticed the play between the bolts and the roller bearings. Chris came up with a clever fix using aluminum tape.

Chris found that wrapping the entire circumference of the bolt was too tight to slip the bearings on so he used an utility knife to reduce the width of tape, allowing for more play. Your results may vary but refer to the images below to see what worked for him.

Tape applied to the bolt.


Tape applied to partially assembled bearing assembly.

Cobblebot - Roller Bearing Fix With 3-D Printed Shims/Washers

If you participated in the Cobblebot Kickstarter campaign in 2015 you may have received your kit and are enjoying some of the challenges of low cost 3D Printer builds.

Many supporters have expressed their issues with the roller bearing assembly and various rub issues with spacers, washers, eccentric spacers and bolt heads. In this video I show how I am solving for these issues.




Here are the 3D print files on Thingiverse.com:

• http://www.thingiverse.com/thing:1150971

Most Likely this will work for all the different versions of the Cobblebot machines. Both Cobblebot Kickstarter campaign:

• Cobblebot Kickstarter (2015)
• Cobblebot Kickstarter (2014)