Відео

slot instead of holes. shake in the direction perpendicular to the slots. tilt the bins back and force inaddition to the shaking.

Are all your optocouplers the same model? The one that you show as being a lower amplitude looks like it may be a narrower beam giving you the lower integrated power. The output on the optocoupler, assuming its linear, will be the convolution of the laser beam with the shape of the slot in your encoder. If you keep reducing the slot width, while keeping the spacing, you will eventually be measuring the width of the optocoupler beam and not any smaller. In fact you just made a pretty standard slit beam profiler. Your measurement error could then just be the fact that you included the width of the beam in the measurements Excellent video as always

You and your bearings :) Great video. Enjoy the extra discussion about the mechanics of the design Glad the fractal vise had a cameo

Schmitt-trigger inputs will not trigger at v/2 but instead have different trigger points for rising and falling signals. Something to keep in mind.

I really wanna see a version that's using many more iterations to much more finely fit any shape. I'd also like to see a "3D" version that can fit shapes in *two* dimensions. For the flexure version, is it possible to increase the range of motion by "stacking" leaves in alternating layers so they can "move through" each other? Kinda like shuffling cards by pushing half a deck into the gaps between cards in the other deck

Awesome project and execution! i always like the diy slip ring approach either a cheap 3018 cnc pcb or a fabbed one with battery contacts as the wipers

Dry your filament. It should get rid of the voids in the layer lines.

brilliant mutli discipline work, my suggestion is calibrating your fdm printer, these small holes I believe stem from too harsh setting of linear/pressure advance leading to underextrusion at the end of the movement in a layer

Metal balls on a metal raceway would let you transfer power.. With 2 you could get positive and negative. Could probably just use the shaft of the servo.. That would let you decouple your spiny bit from your base without as many wires on the bottom. Probably not using enough power to need much more than a sheet or 3 of heavy aluminum kitchen foil to pass the power without to much thermal load happening or forming to much oxidation. Any data transfer wires could probably be done with an ESP now, wifi, or Bluetooth solution.

Hard to beat slip rings

Very cool, thx

just use a vibratory motor and vibrate the whole thing. fluidize the mass of screws.

Definition of insanity, not spending cca 50$ on aliexpress for 5 micron glass linear encoder + rpi pico and call it a day (60$ in total). But rather spend > triple on wood, electric components, time, electricity and laser machine wear. 🤯🤯🤯🤯

Custom make your own silicone tubing in wall thickness and diameter. Silicone caulk can be pushed through a tube forming mold and can be hardened with a Hydrogen Peroxide bath. 3D print the molds so they can be split open and cleaned

Possibly consider etching lines into the non-reflective side of glass mirror for linear stability? Which will still only be as good as your laser units/step. Secondarily the finer the lines, the more important a vernier graticule or mask in front of the receiving quadrature sensors as to block stray detection from the side.

From the video, it looks like the warping (curvature) of the web might be one of the biggest sources of variation. I assume it's due to a combination of uneven heat application and latent stress in the wood being relieved.

are you going to put two sensors 90 degrees out of phase and interpolate to multiply and get higher resolution in the end?

With multiple sensors and being able to laser cut arbitrary slots it would be interesting to see if you could make this into an absolute position encoder. Not sure what to use it for, but it would be cool.

It's easy to underestimate the efficiency and power behind good old fashioned hand cranking

or just buy 180LPI or 360LPI Encoder Film for like 10$ for 5m. Solves the problem cheaper than you can cut them :)

How about comparing that to the 3D printed ver?

Think expansion and contraction of the wood will matter? I've wondered if a (stationary) threaded rod and an inductive sensor could be used for positioning. Should be very repeatable, so the errors in the rod could be mapped for better accuracy, if desired.

Excellent work! I'm wondering if it's possible to make glass scales by etching glass with a diode laser. Years ago, I did some laser engraving by coating the glass with black paint, and occasionally the paint would even deposit almost permanently onto the engraving.

But isn't the point of those to hold the piece enough for the forces of machining?

At 3:27, what kind of error?

This is actually closer to a hardware version of the Fourier series, not a Taylor series.

Which hich software do you use

It's just a matter of time until the 3D version of fractal vise comes out

Flexures are so underutilized, very nice designs! I wonder if you could get a thinner flexure by printing the notch flexure web in the plane of the print bed. Might lose some strength but you could scale the thickness with layer height instead of wall thickness then and maybe get some thinner webs

Right ear missing out

I think you might have just inventer the windscreen wiper ! 🙂

What software do you use for your simulations?

why is there only left audio...

Did you seriously use an Ai image for that bit? It woukd have taken less time to google image search some clipart

This was a fun video, and I get the love of the vise, and the limitations! Your skill and understanding have been very beneficial to seeing the same goal, but through different mechanisms! I am stoked to see how this adventure goes!

Try using a spring in the joint

You could probably make a fairly stiff yet compliant flexure with properly cured tough resin printed models. Resin printing could also allow for way more hierarchy levels and if you really want to go the extra step you could print the model in wax resin and vacuum cast it in metal

I'll be real, my fractal vice is just foam. It's more stable than a 3D printed fractal device, easier to work with, but it's also cheaper. Not all foam works perfectly sure, but there's enough good options not to care too much. Maybe I should consider making it compliant in only one dimension, but that ruins the simplicity of my genius design.

One day, if I ever get good at machining, I'd like to build a metal fractal vise. They are legitimately one of the coolest tools ever. However, a 3D printed one has a certain charm to it.

Outside of the panned audio, this is really cool.

that blue filament you used looked familiar... is that HT-PET+ ?

did you know you can print 0.2mm walls with a 0.4mm nozzle printer?

your videos dont need AI pictures in them, please stop using them

Was interested, but the Ai generated images are really annoying

you made me think my headphones broke

I don’t think the designs are the only thing tweaked lol

PETG and TPU bond very well together and become almost as strong as ABS

Wonder how a blend could work

Can this thing like... Actually HOLD anything tho? There's no point to a vice if it doesn't actually clamp down stuff hard..

Replace the pins with print in place pins, then you have to break them free at first, but then you have a singe print with no assembly