A second lucky pig bobble - see thing:1828478. The bobble is composed of two parts that print more readily than the original. A recursive curve is used as a spring. The bobble was designed to work when printed in PLA but adjustments can be made for other materials.

The spring was calculated using the program included with thing:2377518 - Closed Recursive Curves. The input parameters were: 5,10,4,180,2,17,0,1,0,2,bobble_base.stl". The final "2" in the list is the radius of the spring - 2 mm. To make a stiffer spring increase the radius to 2.5 mm.

MakerBot

MakerBot Replicator (5th Generation)

Yes

Yes

0.3 mm

The spring needs support; the head can be printed without support.