The previous compass design would be repeatable if I could reliably manufacture aluminum posts. The technique relied on double-sided tape for its springy quality, but that will degrade over time. It may last longer if it were sealed in a noble gas, but I wanted to experiment with a spring-loaded axle.
I had some pogo pins in my stock, so I designed a drilling jig to hold an M2.5 bolt that fits into the middle of my cylindrical magnets. The fixture is layers of plywood that contain a bolt at one end where I can clamp it into an electric drill, then it holds an M2.5 hexagonal coupler nut, and the far end has pinholes to guide a miniature drill bit down the center.
Drilling a plastic bolt
I destroyed two coupler nuts and nylon bolts but had three successes. If I had a proper lathe, it would be a higher success rate. I can use the threaded portion to mount it into a magnet, and the spring-loaded top can provide the necessary tension.
M2.5 nylon bolts with pogo pins installed
GitHub files for GrinderCompass
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.
2023-08-03
I had some pogo pins in my stock, so I designed a drilling jig to hold an M2.5 bolt that fits into the middle of my cylindrical magnets. The fixture is layers of plywood that contain a bolt at one end where I can clamp it into an electric drill, then it holds an M2.5 hexagonal coupler nut, and the far end has pinholes to guide a miniature drill bit down the center.
I destroyed two coupler nuts and nylon bolts but had three successes. If I had a proper lathe, it would be a higher success rate. I can use the threaded portion to mount it into a magnet, and the spring-loaded top can provide the necessary tension.
GitHub files for GrinderCompass
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.
2023-08-03
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