Modeling was done for a servo and hinge holder. Pieces focused on the idea of using #6 (3.5mm) bolts as cross-members. For this design consideration bolt holes had to be placed identically to ensure a bolt could pass through all the pieces. Two pieces were modeled, one which would hold the servo and act as the body and the smaller second which was meant to act as a hinge base while mounted parallel to the body. A quick model was drafted and printed but the distance between the hing and servo was approximately 9mm too long so a second model was made to correct this.
Printed pieces were attached with 3" (75mm) bolts which were almost certainly too short. Numerous nuts were used which was time consuming and finicky but acceptable for an early prototype. Servos were laid in place but not screwed in place.
Servo lever arms which attached to the underside of the servo horns should be modeled to conserve space. These levers would have a large (7mm) hole at the servo end which the servo horn would pass through while giving it a good leverage point. Designing a lever arm like this would only require one screw to hold it in place.
Downloadable Files:
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.
First print and shorter corrected print below
Rotating view of short model
Printed pieces were attached with 3" (75mm) bolts which were almost certainly too short. Numerous nuts were used which was time consuming and finicky but acceptable for an early prototype. Servos were laid in place but not screwed in place.
Assembly with printed parts
Focus on servo and expected clearances
Servo lever arms which attached to the underside of the servo horns should be modeled to conserve space. These levers would have a large (7mm) hole at the servo end which the servo horn would pass through while giving it a good leverage point. Designing a lever arm like this would only require one screw to hold it in place.
Downloadable Files:
- Common OpenSCAD files
- Servo footprints for OpenSCAD.
- Wrist Mounted Chording Keyboard. All STL printing Files. If you want to print.
- Parts for index, middle, and ring fingers.
- Parts for pinky finger.
- Thumbboard.
- Servo lever.
- Wrist base.
- Left-handed Wrist Mounted Chording Keyboard. All STL printing Files. If you want to print.
- Parts for index, middle, and ring fingers.
- Parts for pinky finger.
- Thumbboard.
- The servo lever and wrist base are the same as the right-handed version
- Wrist Mounted Chording Keyboard. All OpensCAD Files. If you want to make changes.
- Parts for index, middle, and ring fingers.
- Parts for pinky finger.
- Thumbboard.
- Servo lever.
- Wrist base.
- Arduino Code for wired keyboard
- Spreadsheet for chords.
- Modify two servos for continuous rotation.
- Wrist mount
- Model lever arms
- Build
- Test
- Refine
- Repeat
- Activation switch
- Route wires
- Write instructions
- Schematic
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.
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 claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2015-08-25 03 (Tu)
Comments
Post a Comment