Skip to content

2025 update #3

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
TheOriginalStego wants to merge 6 commits into
base: master
Choose a base branch
from
Open

2025 update #3

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
ed80803
README.md updated with an „CHANGELOG“ section to document recent mods
TheOriginalStego May 21, 2025
6f7a227
Readme actualization
TheOriginalStego May 21, 2025
2a432d7
README.md aktualisieren
TheOriginalStego May 21, 2025
0a39a52
README.md update
TheOriginalStego May 22, 2025
add91b2
New hand design
TheOriginalStego Mar 6, 2026
8acffaf
README update with maintenance details
TheOriginalStego Mar 6, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Binary file added Hardware/Roberto_Updated_2025/Roberto_New_Hands_2025.stl
View file
Open in desktop
Binary file not shown.
10 changes: 10 additions & 0 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,16 @@ The power system has been revised in May 2016, leading to the design of a new pu
In 2017, a second pump was added. The pumps are driven by having stacked PCBs from 2016. Furthermore, a shield made from veroboard was made. It works as a normal shield instead of an "inverted shield". This way if the Prismino dies, any other can be used.
Also, the amount of liquid to be poured is now measured using a scale instead of a timer (ie no measurement). This required the hand to be redesigned and the design can be found on the Fusion360 account of Robopoly.

## CHANGELOG
### 2025 Maintenance and repair
In may 2025, repair and maintenance was done by Tibor Truong.
The design of both hands was modified in order to adapt to various sizes of glasses and improve reliability. The loadcell was removed from it's plattform underneath the cup holder and was integrated directly into the cup holder (holder itself measures the weight). The hand on the "pouring" side was also redesigned. The hoses can now be installed and removed way faster thanks to zipties.
The switch that sensed the closing of the hands was replaced by a reed sensor. This ensures that contact is closed even when the arms don't touch very well (due to mechanical play).
The existing two pumps were thoroughly cleaned with a 1% NaOH solution to get rid of the mold and other gunk that has been building up for years.
During repair, the loadcell amplifier board was damaged, it got replaced by a more recent model sold by Robopoly.

Note for users: Please always rince the hoses at least with warm water (or better with a desinfecting solution) and dry them completely before putting away the robot for storage. Leaving liquids in the pumps and hoses leads to mold formation and it's very work intensive to get rid of it again. Not even mentioning that it's disgusting and not foodsafe.

## Credits

This project has been an ongoing one and a lot of people have been working on it without whom this wonderful robot would've never existed.
Expand Down