The second largest diameter gears were 500mm plus the teeth and would not fit on the plastic sheets. The largest diameter gears only fit because they were printed with half the teeth. 1/4" (6mm) hardboard was purchased to make these gears. Hardboard could have been used for the whole project but it is more difficult to work with and heavier. Low inertia will be important for these gears which only have a small motor to drive them.
Gears were adhered to the wood the same as plastic, using Super77 spray adhesive. They were then clamped to a table with a long steel bar to distribute the pressure. A jigsaw was used to cut out the teeth as before.
When all the teeth were cut from the 500mm gear a picture was taken with my left hand as a size reference. Cutting hardboard was slower and more difficult than cutting plastic but it smelled better. The plastic was softer and less prone to flaking plus the friction of the saw blade was enough to slowly cut with the sides and back of the blade so tighter turns could be made.
Downloads:
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.
2016-09-10 (Sa)
Gears were adhered to the wood the same as plastic, using Super77 spray adhesive. They were then clamped to a table with a long steel bar to distribute the pressure. A jigsaw was used to cut out the teeth as before.
Jigsaw and clamp used to cut gear teeth
When all the teeth were cut from the 500mm gear a picture was taken with my left hand as a size reference. Cutting hardboard was slower and more difficult than cutting plastic but it smelled better. The plastic was softer and less prone to flaking plus the friction of the saw blade was enough to slowly cut with the sides and back of the blade so tighter turns could be made.
Large gear cut from hardboard
Downloads:
- Gears
- Panel layout PDF or DWG
- S Symbol Plate OpenSCAD source or STL model
- Ultrasonic flush mount source or STL
- 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.
2016-09-10 (Sa)
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