Yesterday’s printed spinner would not rotate on the printed base. When placed on a different pivot point the spinner would not hang horizontally. The point where the spinner pivots had to be raised. This was not an issue with the first models because the pivot point started high but was lowered to print more easily.
The assumption was that the spinner would hang horizontally so long as the pivot point was above the center of gravity. This may be true but the precision of the printer could not achieve a perfect model. The pivot point was raised above the magnets again but only by a short distance. In this case maybe four millimeters. Measurements for the magnets were also changed to reflect the locally available magnets which were larger.
The keyed base, which only allow the spinner to rock back and forth when facing north, was remodeled. In yesterday’s version incompatibility between the keyed hole and the keyed pivot point was the reason the spinner wouldn’t spin. Part of the issue was not using the correct measurements from the spinner code and the case code. This was corrected by creating appropriately named variables.
Similar changes were made to the base so the keyed post would mate with the keyed hole in the spinner. Remodeling was done with the post using the named variables. Length of the post was raised above the height of the walls. The walls were widened since the last model had some friction between the spinner and base.
To do:
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1.
Completed projects from year 2.
Spinner inside base which wouldn’t spin
The assumption was that the spinner would hang horizontally so long as the pivot point was above the center of gravity. This may be true but the precision of the printer could not achieve a perfect model. The pivot point was raised above the magnets again but only by a short distance. In this case maybe four millimeters. Measurements for the magnets were also changed to reflect the locally available magnets which were larger.
Spinner and base separated
The keyed base, which only allow the spinner to rock back and forth when facing north, was remodeled. In yesterday’s version incompatibility between the keyed hole and the keyed pivot point was the reason the spinner wouldn’t spin. Part of the issue was not using the correct measurements from the spinner code and the case code. This was corrected by creating appropriately named variables.
Updated spinner model
Similar changes were made to the base so the keyed post would mate with the keyed hole in the spinner. Remodeling was done with the post using the named variables. Length of the post was raised above the height of the walls. The walls were widened since the last model had some friction between the spinner and base.
Updated base model
To do:
- Optional:
- Add compass rose to spinner
- Add holes to reduce plastic
Add “keyed” features to only allow slop when facing north- Make handheld haptic compass
- Make compass work from pocket or necklace
- Miniaturize
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1.
Completed projects from year 2.
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All
information in this blog, or linked by this blog, are not to be taken
as advice or solicitation. Anyone attempting to replicate, in whole or
in part, is responsible for the outcome and procedure. Any loss of
functionality, money, property or similar, is the responsibility of
those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes
the intellectual property of Brian McEvoy. Any information contained
within these messages may be distributed or retained at the discretion
of Brian McEvoy. Any email sent to this address, or any email account
owned by Brian McEvoy, cannot be used to claim property or assets.
Comments
to the blog may be utilized or erased at the discretion of the owner.
No one posting may claim claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2015-12-17 (Th)
Comments
Post a Comment