Below the final gear a reed switch was being installed. This switch was meant to detect magnets, which have yet to be mounted on the final gear. The purpose of the switch and magnets was to detect when the final gear was at its limits. A structure to hold the reed switch was being designed. It was going to be built with a small piece of scrap wood. During the design process it seemed like it could be a complex design with a simple 3D printable solution. A model was quickly written and printed.
The model was printed with high infill so it would be a sturdy piece even though it shouldn't have to withstand any severe pressure. Printing rather than cutting and drilling saved a trip to the hack space and ensured that a second model could be printed with the same characteristics.
A reed switch was given two wires. Wires were soldered to the tips of the switch leads and covered with heat shrink tubing. One idea was to attach the wires directly to the bolts passing through the switch holder. This would eliminate wires which would have to pass through the gear board. This could reduce the reliability of the switch connection and the wires would be hidden by the gear.
Two #10 (4.5mm) countersunk bolts and matching nuts were used to install the switch holder to the gear board. Wires on the outside were bound together with zip ties and kept to one side so the holder could be used to hold the final gear out of the way. The bolt installed for the purpose of holding the gear at the correct height could be removed now that the switch holder was installed.
A third hole was drilled for the wires. The red and black colors were chosen arbitrarily since the switch was not a polarity sensitive device.
Wires from the switch were run to the RJ45 junction box. They were attached to the ground screw and the reed switch connection. All the wiring for the gear board was completed. Wires from the RJ45 box were bundled with zip ties and a tie block was used to keep the wires neat.
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.
2016-12-09 (F)
Rotating view of reed switch holder
The model was printed with high infill so it would be a sturdy piece even though it shouldn't have to withstand any severe pressure. Printing rather than cutting and drilling saved a trip to the hack space and ensured that a second model could be printed with the same characteristics.
Printed model
A reed switch was given two wires. Wires were soldered to the tips of the switch leads and covered with heat shrink tubing. One idea was to attach the wires directly to the bolts passing through the switch holder. This would eliminate wires which would have to pass through the gear board. This could reduce the reliability of the switch connection and the wires would be hidden by the gear.
Soldered reed switch
Two #10 (4.5mm) countersunk bolts and matching nuts were used to install the switch holder to the gear board. Wires on the outside were bound together with zip ties and kept to one side so the holder could be used to hold the final gear out of the way. The bolt installed for the purpose of holding the gear at the correct height could be removed now that the switch holder was installed.
Mounted switch holder
A third hole was drilled for the wires. The red and black colors were chosen arbitrarily since the switch was not a polarity sensitive device.
Wires passing through back of gear board
Wires from the switch were run to the RJ45 junction box. They were attached to the ground screw and the reed switch connection. All the wiring for the gear board was completed. Wires from the RJ45 box were bundled with zip ties and a tie block was used to keep the wires neat.
Tidy wires
Downloads:
- Gears
- Panel layout PDF or DWG
- S Symbol Plate OpenSCAD source or STL model
- Ultrasonic flush-mount source or STL
- Internal ring gear
- Spring hub includes source and STL for metric and imperial
- Slow ramping Arduino sketch
- 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.
2016-12-09 (F)
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