2015-02-21 (Sa) ESPeri.Impass

The conical rests could potentially introduce a lot of friction. This would be caused by the edges of the spinner point rubbing against the cone walls. A sloped surface, like an ellipsoid may be preferable for the spinner rest. The spinner design will involve a magnet with a pin coming off of each side to rest on the enclosure. It may be beneficial to make an enclosure design with a cone coming from either side to hold a magnet spinner.

The first design was a hemispherical nub over the hole in the enclosure. This mass seemed excessive even though the most friction would take place at this point. The second design was a hemispheroid with the same proportions as the enclosure itself and this seemed like a better design.

External view of hemisphere design

External view of  hemispheroid design

Internal view of  hemispheroid design

The final design for a rounded spinner holder was a small sphere with a very small divot. This design may be difficult to get the spinner seated but it should provide a low friction and precise method of holding the spinner in place. The code for the spinner rests was commented out with notation that only one should be selected for the printing.

 External view of the small hemisphere design

Internal view of  hemispheroid design

Code showing code for both spinner rests

To do:
  • Design an enclosure with a cone to capture a spinner
  • Design hemispherical spinner rest
  • Design spinner for spheroid compass
  • Design spinner mount for tubular compass
  • Install larger bearing 
  • Cut/bend hanging bracket for spinner
  • Buy spongy material for spinner to land on
  • Test + Evaluate hanging tubular compass
  • Redesign, Rebuild, + Repeat

The rest of the posts for this project have been arranged by date.

A list showing of all the final posts of COMPLETED projects.

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2015-02-19 (Th)