I learned how to read vernier calipers yesterday and when I finally understood the concept I thought "Oh, so it's like a moire pattern. Wait, has anybody done that?". And here you are! I'm disappointed I'm not the first to come up with the idea but I feel validated now that I've seen your beautifully made proof of concept. Thank you so much!
Doing my literature research for my Masters right now. One of my goals is to design a low-cost encoder. I was doing my literature research, and was inspired by the vernier scale, and the amplification a Moiré scale gives for small motions. So I thought of a way to combine these two. First I googled whether it was done or not, found your link. Thanks for the proof of concept, might be able to cheaply measure in the micro scale now!
Entre ça et le cadran solaire, chapeau ! Effectivement, le résultat final s’apparente à l’utilisation d’un pied à coulisse traditionnel, mais la valeur lue est plus explicite que le pied à coulisse traditionnel. Pour ma part, j’évite les pieds à coulisse numériques bon marché pour prendre des mesures d’objets avant de les modéliser en 3D. En revanche, quelle est l’influence de la T°C de l’ambiance ? L’outil plastique se dilate-t-il plus que celui en acier inox ? Ou bien imperceptible dans la plage de précision de mesure ?
Any thoughts on possible print-in-place moire caliper? I imagine the real trouble would be in calibration, and precision before printing, but at that point this could be a very useful, but easy to make tool! BTW, came across this after looking at Inogon lights. I have a new obsession!
I still haven't found a good way to model it as a quick and easy print-in-place without making the alignement and glueing of the images significantly much harder. "Inogon lights" ! so that's what they are called ! Thanks so much for this: I had heard about these, but I had no idea what words to google to find out more about them.
Thanks heaps for the thumbs up ! Before even thinking about a Patreon, I feel like I should probably focus first on building a small portfolio of projects so that it becomes a little bit more obvious what type of videos and projects I might publish next. This might end up being a "Cute cats Vs Lasers" channel...
Clear, Interesting and Entertaining video! Hitting the subscribe-button was a real no-brainer, Hope to see more of you soon! Just to bad that my HP combo-printer is permanently out of ink (It even refuses to scan anything because it pretends that it is out of ink..) ^_^
You can do much better than that. Put the numbers 0-9 in a moire pattern similar to www.michaelbach.de/ot/mot-scanimation/index.html and a 1/10th slit over it. (or linear fresnel lenses like those on collectors cards)
Good thinking indeed! I did actually try to directly display the numbers in my first prototypes, pretty much exactly the way you just mentioned. But I never managed to moire images bright enough to be useful. You need a 1/20th slit (or smaller) to avoid showing several consecutive numbers at once. Also the inkjet printing process is far from perfect so you need to narrow these slits even more to account for it. So that doesn't leave much white paper to display the numbers :/ Another issue is the fact that when you want to read the numbers on the Moire display, the moire images are static. This makes discerning the numbers somewhat much more difficult than when the top image is moving. I guess a possible work-around would be to use some sort of backlight... but then why not directly get an (electronic) digital caliper instead ? So basically the main problem seems to be that we are using a base-10 counting system...
![[EN] Mojoptix ep. #001: Digital Sundial](http://i.ytimg.com/vi/wrsje5It_UU/mqdefault.jpg)
I learned how to read vernier calipers yesterday and when I finally understood the concept I thought "Oh, so it's like a moire pattern. Wait, has anybody done that?". And here you are! I'm disappointed I'm not the first to come up with the idea but I feel validated now that I've seen your beautifully made proof of concept. Thank you so much!
I am glad I found your videos.
Doing my literature research for my Masters right now. One of my goals is to design a low-cost encoder. I was doing my literature research, and was inspired by the vernier scale, and the amplification a Moiré scale gives for small motions. So I thought of a way to combine these two. First I googled whether it was done or not, found your link. Thanks for the proof of concept, might be able to cheaply measure in the micro scale now!
Very smart design!
If you mass produced those, they might be cheaper than the digital calipers and maybe outperform them (metal with acrylic).
That is cool. Very cool. I am eager to see what you have prepared for us next !
Moire fringing has been used in crack measurement in Engineering. Not quite a general set of calipers but a use in measuring non the less
Wish you could make many more of these wonderful videos!!
Yay! I'm happy you posted another video!
Great video! Looking forward to both your english and french content!
Entre ça et le cadran solaire, chapeau !
Effectivement, le résultat final s’apparente à l’utilisation d’un pied à coulisse traditionnel, mais la valeur lue est plus explicite que le pied à coulisse traditionnel. Pour ma part, j’évite les pieds à coulisse numériques bon marché pour prendre des mesures d’objets avant de les modéliser en 3D.
En revanche, quelle est l’influence de la T°C de l’ambiance ? L’outil plastique se dilate-t-il plus que celui en acier inox ? Ou bien imperceptible dans la plage de précision de mesure ?
Beautifully made video
It's very interesting! Good idea 💡
Beautiful! Big thanks for sharing!
Any thoughts on possible print-in-place moire caliper? I imagine the real trouble would be in calibration, and precision before printing, but at that point this could be a very useful, but easy to make tool!
BTW, came across this after looking at Inogon lights. I have a new obsession!
I still haven't found a good way to model it as a quick and easy print-in-place without making the alignement and glueing of the images significantly much harder.
"Inogon lights" ! so that's what they are called ! Thanks so much for this: I had heard about these, but I had no idea what words to google to find out more about them.
Hey I forgot I have subscribed! But I'm glad I did, certainly an interesting project, I'll be trying it soon, thanks!
I don't want to buy your knicknacks, but if you had a Patreon and set it per-entry (rather than per-month), i would totally subscribe on there.
Thanks heaps for the thumbs up !
Before even thinking about a Patreon, I feel like I should probably focus first on building a small portfolio of projects so that it becomes a little bit more obvious what type of videos and projects I might publish next. This might end up being a "Cute cats Vs Lasers" channel...
Clear, Interesting and Entertaining video! Hitting the subscribe-button was a real no-brainer, Hope to see more of you soon! Just to bad that my HP combo-printer is permanently out of ink (It even refuses to scan anything because it pretends that it is out of ink..) ^_^
Amazing👍👍👍
Spectacular!! :-) 🦊
I don’t have transparency paper :v
You can do much better than that. Put the numbers 0-9 in a moire pattern similar to www.michaelbach.de/ot/mot-scanimation/index.html and a 1/10th slit over it. (or linear fresnel lenses like those on collectors cards)
Good thinking indeed! I did actually try to directly display the numbers in my first prototypes, pretty much exactly the way you just mentioned. But I never managed to moire images bright enough to be useful.
You need a 1/20th slit (or smaller) to avoid showing several consecutive numbers at once. Also the inkjet printing process is far from perfect so you need to narrow these slits even more to account for it. So that doesn't leave much white paper to display the numbers :/
Another issue is the fact that when you want to read the numbers on the Moire display, the moire images are static. This makes discerning the numbers somewhat much more difficult than when the top image is moving.
I guess a possible work-around would be to use some sort of backlight... but then why not directly get an (electronic) digital caliper instead ?
So basically the main problem seems to be that we are using a base-10 counting system...