I needed the lowest friction possible between my compass spinner and the frame. I ordered zinc-alloy spikes and purchased 1/4" (M6 would be comparable) brass nuts and bolts. I drilled divots into the hardware with 3/16" (M4.5 would be comparable) HSS bits. In my first attempt, I held the bolt with my hand and applied minimal pressure in case I lost control, but the problem was keeping it steady. Once I realized this was foolish, I drilled a hole in an old cutting board, mounted the hardware, and cut into the end of the immobilized bolt. I relied on the drill bit angle to make a concave shape.
I revised my design to a long spinner with pendulums on either side and a support bracket that could clear the bottom bolt. Unfortunately, the support stuck out as far as the protrusions that were supposed to rap against the side when facing north, so I need to reconsider. The spike & cup design worked well, with minimal friction between the spinner and supports. I swung the compass around with an off-camera magnet to show how smoothly it operated.
Assembled and rotating
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
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is 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 property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2023-03-29
Bolt with a divot
I revised my design to a long spinner with pendulums on either side and a support bracket that could clear the bottom bolt. Unfortunately, the support stuck out as far as the protrusions that were supposed to rap against the side when facing north, so I need to reconsider. The spike & cup design worked well, with minimal friction between the spinner and supports. I swung the compass around with an off-camera magnet to show how smoothly it operated.
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
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is 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 property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2023-03-29
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