All the paper gears which could fit onto the plastic sheets were arranged. The paper was then placed upside-down and spray with Super77 and allowed to dry. All the experimental seven and eight tooth gears, which were 100mm in diameter, were applied to the plastic sheets.
The bandsaw used last time was abandoned in favor of a handheld jigsaw. This saw had a fresh blade and cut much faster and reliably. A suitable bandsaw with a sharp blade would still have been preferable. One thing I was worried about was the paper getting caught and crumpled under the jigsaw and this happened but infrequently and the teeth will still be easy to form as long as another gear can be placed over the tooth during forming.
All the paper gears were cut out in a circle. The teeth were not formed yet. The same jigsaw was used to cut between the teeth and was also a better choice than the band saw with a dull blade.
All the smallest gears had the space between the teeth cut out with the saw. This was four 7-tooth gears and four more 8-tooth gears as well as a 12-tooth gear. The smallest gears were done to ensure that a good technique could be found before experimenting with the large gears. The flat end of each tooth was smoothed and finished on a circular sander. This sander ensured a straight edge at the end of each tooth and was fast. The sander could not be used between the teeth due to the size.
The gears were gathered to leave for the night. The ones with cut teeth were ready to be sanded and the final form put on the teeth. The rest need to have the space between the teeth cut out. All the gears will need to have the spokes cut out but this may be waived in favor of attaching mirrors.
Downloads:
Parts list:
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.
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 property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2016-09-08 (Th)
Paper gears arranged on plastic
The bandsaw used last time was abandoned in favor of a handheld jigsaw. This saw had a fresh blade and cut much faster and reliably. A suitable bandsaw with a sharp blade would still have been preferable. One thing I was worried about was the paper getting caught and crumpled under the jigsaw and this happened but infrequently and the teeth will still be easy to form as long as another gear can be placed over the tooth during forming.
Paper gear tooth after damage from saw
All the paper gears were cut out in a circle. The teeth were not formed yet. The same jigsaw was used to cut between the teeth and was also a better choice than the band saw with a dull blade.
All the paper gears on plastic
All the smallest gears had the space between the teeth cut out with the saw. This was four 7-tooth gears and four more 8-tooth gears as well as a 12-tooth gear. The smallest gears were done to ensure that a good technique could be found before experimenting with the large gears. The flat end of each tooth was smoothed and finished on a circular sander. This sander ensured a straight edge at the end of each tooth and was fast. The sander could not be used between the teeth due to the size.
Circular sander used to finish ends. 72 teeth were formed
The gears were gathered to leave for the night. The ones with cut teeth were ready to be sanded and the final form put on the teeth. The rest need to have the space between the teeth cut out. All the gears will need to have the spokes cut out but this may be waived in favor of attaching mirrors.
Stack of gears, cut and uncut
Receiving quality inspection
Downloads:
Parts list:
- 1 Small Arduino Micro
- 2 Stereo potentiometers (10K)
- 4 Multi-turn potentiometers (10K)
- 2 Twelve volt DC motors
- 1 Dual H-bridge
- 2 Ultrasonic distance sensors
- 1 Sine wave generator or the Amazon version
- 1 Voltage Regulator
- 1 Twelve volt three amp power supply
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.
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 property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2016-09-08 (Th)
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