In order to mount the potentiometer, an adapter was printed over a month ago. This was meant to clamp around the bearing holder to hold the shaft of a potentiometer concentrically with the bolt on the final gear. By coincidence or design, the bolt pattern from the bearing holder was the same as the potentiometer adapter plate. This meant there was no reason to clamp around the bearing holder. All that was needed was to extend the bolts currently holding the final gear. The gear was removed and the short bolts were removed.
Long bolts, 2” #10 (M4.5 x 50) were put in place and fastened to the gear board. The potentiometer and its plate were added to the bolts to check alignment. Without any adjustments, it seemed to fit perfectly. Shortening the potentiometer shaft will lower the clearance and reduce leverage on the gear board if it is bumped.
Originally, the plan was to use a short piece of vinyl tubing available at many hardware stores. It would have to have an inside diameter slightly smaller than the potentiometer shaft and the bolt holding the final gear. When it was time to attach them all the local hardware stores were closed so a model was created in OpenSCAD which would couple the two shafts. It was printed with a wide slot so the device could be clamped around the shafts for friction. The bolt and potentiometer were measured and each half was given a custom diameter for the best fit. Vinyl tubing had the advantage of flexibility but the printed coupler has the advantage of exact measurements.
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.
2016-12-07 (W)
Removing bolts from final bearing holder
Long bolts, 2” #10 (M4.5 x 50) were put in place and fastened to the gear board. The potentiometer and its plate were added to the bolts to check alignment. Without any adjustments, it seemed to fit perfectly. Shortening the potentiometer shaft will lower the clearance and reduce leverage on the gear board if it is bumped.
Potentiometer on bearing holder bolts
Originally, the plan was to use a short piece of vinyl tubing available at many hardware stores. It would have to have an inside diameter slightly smaller than the potentiometer shaft and the bolt holding the final gear. When it was time to attach them all the local hardware stores were closed so a model was created in OpenSCAD which would couple the two shafts. It was printed with a wide slot so the device could be clamped around the shafts for friction. The bolt and potentiometer were measured and each half was given a custom diameter for the best fit. Vinyl tubing had the advantage of flexibility but the printed coupler has the advantage of exact measurements.
Rotating view of bolt to potentiometer adapter
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.
2016-12-07 (W)
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