I started sketches for an adjustable piece on the spinner that would raise and lower a ball bearing, but I scrapped the idea because I decided against something that needed adjustment being put on the moving part.
I sketched some ideas that should let me position an M3 threaded rod right next to the bottom screw that holds the spinner axle. I will have to tap the holes after I print the part.
I updated the shell model with my changes. The slot is not a round hole and there are plinths for the machine screws. The bottom plinth has a concavity to accommodate the axle-holding screw.
I printed a new shell bottom, but the hardware did not install as smoothly as I hoped. The central M4 machine screw stuck out further than expected, which bumped into the M3 threaded rod. Everything inside aligned well, but the compass would not sit levelly.
I considered some complicated designs to hold a couple of ball bearings to the spinner, but I settled on a simple one to start with the understanding that I could upgrade if it worked. The tabs are long enough to hold large bearings, but the hole is small enough to accommodate tiny ones. The hole also lets me add glue from the backside.
When I assembled the compass and adjusted the hardware, I got some good feedback! I want to try another design before I spend significant time miniaturizing anything.
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
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
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.
 |
| Idle plans |
I sketched some ideas that should let me position an M3 threaded rod right next to the bottom screw that holds the spinner axle. I will have to tap the holes after I print the part.
 |
| Design notes |
I updated the shell model with my changes. The slot is not a round hole and there are plinths for the machine screws. The bottom plinth has a concavity to accommodate the axle-holding screw.
 |
| Top and bottom showing plinths and holes |
I printed a new shell bottom, but the hardware did not install as smoothly as I hoped. The central M4 machine screw stuck out further than expected, which bumped into the M3 threaded rod. Everything inside aligned well, but the compass would not sit levelly.
 |
| The screws did not line up as I expected |
I considered some complicated designs to hold a couple of ball bearings to the spinner, but I settled on a simple one to start with the understanding that I could upgrade if it worked. The tabs are long enough to hold large bearings, but the hole is small enough to accommodate tiny ones. The hole also lets me add glue from the backside.
 |
| Spinner with tabs on the inside for gluing beads |
When I assembled the compass and adjusted the hardware, I got some good feedback! I want to try another design before I spend significant time miniaturizing anything.
 |
| REV25 works! |
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
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
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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