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First (somehow) working sample
09/22/2023 at 21:37 • 0 commentsNext I draw a mounting of the magents to put over a base plate:
I used the first PCB which was geed enough usable as spring mount and glued the magets on the 3D prined holder:
Then I put some time in a new design in KiCad with only one via and a direct connection possibility of the ESP32S. This time it was successfull when I also used a hightmap with my CNC :-):
Soldering the Hall sensors (49E) to the board and some flying cables to the ESP32S.
(What you also see connected is a 6D IMU over I2S I thought of using and an I2C 3D Magnetic sensor which I tested in parallel as alternative concept. and of course the antenna).
So it seamed that all channels are working (somehow) when I tested with a single magnet (the straight lines have been IMU and the 3D magnetic sensor for away):
Next comes the "marriage" by soldering the bottom with the Hall sensors to the top with the magnets:
It seamed that I lost 3 channels on the way, since only 3 show bigger variations when moving the top. However, tough and feel was not to bad and I think I might stay with the stiffer springs. I already ordered a steel base, let's see how this feels with a bigger weight:
Debugging comes the next days ....
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First experiements in hardware
09/20/2023 at 19:30 • 0 commentsMagnets arrived (rectangular), linear hall sensors (49E) as well and I found some springs. Some tests to get a feeling about sensitivity and distances.
Might work so I started to sketch a demonstrator enclosure. I am still not sure how to place the magnets and halls exactly. Either I measure 6 times the "angled" z distance to the top or 3 times the z displacement and 3 times the in plane displacment like the optical system by connexions space mouse.
Not really sure, so I just stared with a first guess and printed the parts to get some more experience.
I had 20mm long springs with inner diameter of 5mm. The soft ones had a wire diameter of 0.4mm and harder ones of 0.8mm. I just sticked the springs to the poles without glueing
First impressions:
- Magnet fixture needs more distance towards springs and are to thin (break). A mechanical fixture of the hall sensors will be helpfull
- Soft springs seamed too soft, hard ones somehow OK.
- For the hard springs, I think it will be hard to lift the top w/o lifting the base plate. Difficult to test without a heavy base and fixed springs. Maybe preloded?
- Stoppers needed, but I will do them later, initial test work well without
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Prolog
09/17/2023 at 13:34 • 0 commentsI use different 3D tools for my hobby and always struggle to switch between the different keys to push to move around the objects around. I though of using a 6D knob would be very handy and tested the well known professional version at a friend of mine. Really col but 200€ is far to much and so I thought I can build one of my own. I started to search arround the internet and found that there are several enthusiast as me who started the same endeavour:
https://bastelbaus.github.io/Simple6DSpaceKnob/market/
Components are ordered and I will try to take you with me on this journey!