I revised my spinner design to a torpedo shape with all the magnets in a line. On either side was a pendulum with a cross member at the top and one at the bottom. The bottom support was horseshoe-shaped to avoid the bolt in the bottom of the mounting, but it stuck out too far. I added non-ferrous spikes to the top and bottom of the spinner to minimize friction with the bolts holding it upright.
Assembled and rotating
I made a third revision. This one is taller, so I added some interface rings to allow me to build a longer cage by stacking. I changed the pendulums to have strikers at the top and bottom, but they are bottom-heavy. I assembled it, but I still need improvements.
Rev3 in CAD
I went back to the drawing board for REV4. The long pendulums were causing interference at every angle, so I shortened them so they only protruded off the north-facing magnet. I switched to rectangular magnets for this model.
REV4 parts
I could not find a brass axle to hang the pendulum, but I had a steel nail, which worked all right. I made this model two levels high but picked a balanced pendulum that did not want to spin.
REV4 with a tri-lobe pendulum
The REV5 spinner encapsulates the magnets except for the ends because the pull will hold them in that direction. There are three holes on the sides. The central hole will have the axle, and the other two will keep the magnets from shifting when I remove the axle to swap pendulums.
REV5 Spinner
I built the REV5 spinner and was impressed by how well it worked. Tension held the wooden pieces together, and magnetism secured the magnets. I could swap axles without a problem. The current issues are the pendulum is too light and the spinner is not secure in the cradle.
REV5 parts
The rest of the summary posts 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.
I made a third revision. This one is taller, so I added some interface rings to allow me to build a longer cage by stacking. I changed the pendulums to have strikers at the top and bottom, but they are bottom-heavy. I assembled it, but I still need improvements.
I went back to the drawing board for REV4. The long pendulums were causing interference at every angle, so I shortened them so they only protruded off the north-facing magnet. I switched to rectangular magnets for this model.
I could not find a brass axle to hang the pendulum, but I had a steel nail, which worked all right. I made this model two levels high but picked a balanced pendulum that did not want to spin.
The REV5 spinner encapsulates the magnets except for the ends because the pull will hold them in that direction. There are three holes on the sides. The central hole will have the axle, and the other two will keep the magnets from shifting when I remove the axle to swap pendulums.
I built the REV5 spinner and was impressed by how well it worked. Tension held the wooden pieces together, and magnetism secured the magnets. I could swap axles without a problem. The current issues are the pendulum is too light and the spinner is not secure in the cradle.
The rest of the summary posts 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.
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