Sub-project of the Arcus-3D-P1 Pick and place for 3D printers project.
Project designed in OpenSCAD and rendered out to printable files via script. Source and output files are up on Github.
The base for this was designed to snap on a Lego sheet at both full and half post spacing. This lets you pick any required tape width using the same base, and quickly build any feeder configuration you may need. As a bonus, using the sheet gives you an indexed location for each part pick point, without needing to re-tune each one when you move them.
The mount itself was designed with a bending interface, much like real Lego blocks, so it can tolerate a rather large range of over/under extrusion and still work. This is much better than the simple interference fit which I started with.
Each block is printed as two parts. This lets you print the base on it's side, which is much stronger, and which then allows for the bending block - post interface. The top covers can be then be printed flat and so no bridging or overhangs are required.