Brinquedo de secretária Double Helix

Here I present my double helix table toy. Two spirals are connected in such a way that they form an endless ribbon. If you bump them or let them roll down a slightly sloping surface, the inner and outer spirals appear to turn against each other, because the eye is deceived by the different winding of the spirals.
You can also scale the parts. Here is a short video: https://youtu.be/VbpvZS781l4
You can paint or varnish this small kinetic sculpture as you wish and get a very nice table toy to cheer you up during boring desk work or social evenings. Here you can show off with a gag. For the support settings, it is best to use the tree with an overhang angle of 55 degrees.
PLA or standard resins are suitable for printing.

Printer details:
For FDM:
Layer thickness: 0.1 mm, (little rework, good surface and less sanding required.)
Print temperature 200 °

Print bed temperature of 60 °
Printing speed: 70 mm
Outer wall speed: 20 mm
Flow: 100%
Wall thickness 10 mm
No infill due to the balance, i.e. solid print!
Pressure plate adhesion Brim / 15 mm wide
Support setting: Best tree with an overhang angle of 55 °

Please ensure good bed adhesion. Simply remove the supports from the finished model and sand off the residue.
The settings for resin printing depend on the properties of your printer. Standard resins are suitable.
I have 2 printers in operation:
For FDM: Ultimaker 3 Extended (PLA works very well here),
and for resin: Phrozen Transform Fast.
Both are excellent devices.