This is a “floating” coaster. The two platforms hold each other with the chains with opposite forces to create a floating looking coaster.

You will need to print:

2x coaster_base.stl

10x coaster_anchor.stl

20x coaster_chain_link.stl

1x center_ring.stl

Instruction

A: Install the center anchors and ring. It can be a little tricky to install. Here is how I did it:

1- Pass an anchor trough the center ring and clip the anchor (with the ring) to one of the base.

2- Using long pliers, hold an anchor and pass it trough the center ring. (keep holding)

3- With your other hand, position the other base and insert one end of the anchor in the hole. (keep holding)

4- Using the plyers, insert the other end of the anchor in the other hole.

B:

1- Create four chains of five chain links

2- Pass an anchor trough the end of a chain link and clip the anchor in one of the corner holes of a base.

3- Pass an anchor trough the other end of the chain and clip it to the corresponding corner hole in the other base (make sure it's not twisted)

4- Repeat for all corners.

Print settings:

I recommend printing the bases on their side with support so that the arm is horizontal to maximise the arm's strenght. 20% infill should be enough. I used 0.2 layer height.