turbo-resin VS UVtools

Async Rust does definitely work for non-toy use cases. As a data point, we use Embassy for all production firmware at my startup (https://akiles.app/en), using async tasks for everything: Bluetooth, TCP/IP networking, motor control, user interface (LEDs, keypad), a key-value database in flash, stats collection... Async helps with battery life too since it allows putting the core to sleep when no task has work to do, it allows us to build devices with 1-2 years of battery life.

There's other companies using Embassy in production. Sadly firmwares are usually not open source. There's a few non-toy open-source projects using Embassy though:

- https://github.com/nviennot/turbo-resin

I know this exists, https://github.com/nviennot/turbo-resin maybe they already have something documented?

There has been some steady (but slow) progress on an open source firmware for a few popular printers, with one of the goals being to allow multiple file formats. I believe they're still targeting the Mono 4k and Saturn for their first release, but I haven't checked in on the project for awhile.

Yes!! Here's my Rust 3d printer software: https://github.com/nviennot/turbo-resin

There's a nice Photon Mono 4k reverse engineering project by Nicolas Viennot on GitHub where he fixes the crappy touch sensing in the firmware. The goal is to replace the firmware on a variety of chitu-based resin printers with much better open source firmware.

Backstory: I'm writing TurboResin, an open-source firmware for resin 3d printers. We want to support many printers, and one of the difficulty is to understand the electronic board layout and protocols of each printer.

It's coming https://github.com/nviennot/turbo-resin

This is the last part of the reverse engineering series. At this point we are confident that we can finish the firmware to do a print. The firmware repository is here: https://github.com/nviennot/turbo-resin/

There is a project to produce an open source firmware for resin printers TurboResin - it's at a very early stage (not able to actually print yet, but making progress) In time, it should be able to do something similar to what the RERF does and use different exposure times within the same print to strengthen interior parts while leaving surfaces less exposed for maximum detail, which would be very cool!

That's it in a nutshell. I think the pump idea would work but resin is messy so changing resins would be a pain and you would have to clean the lines. Although if you had control of the printer which this project looks well on it's way to accomplishing: https://github.com/nviennot/turbo-resin then you could use the build plate to mix the resin which would simplify things a lot.

Does UVTools recognize the files?

As for this, you could try UVTools. I just used it to open an existing ctb file (any will do), remove all layers but one, and then replace that layer with a monochrome image file of my choosing.

If only to rule out some kind of fault with the file itself, if you download UVTools, github here... https://github.com/sn4k3/UVtools/releases ...then you could import your sliced file (the .pwma file) and just check to see if those layers existed.

I do cubes of calibration then cones of calibration as the video above teaches. Then I followed UVTools guide on rest times and z-axis tuning, including using his modded gcode file to slow down the acceleration rates of the z-axis motor https://github.com/sn4k3/UVtools/wiki/Rest-times-and-TSMC. I use this print to test for bloom, layer lines and anti-aliasing performance https://cults3d.com/en/3d-model/various/print-angle-model. Dennys Wang has a good video using it https://youtu.be/cGAgyRVK32g

https://github.com/sn4k3/UVtools/releases/ I think when you install it, and you run a slice with lychee, you get a pop up asking if you want to check with UVTools. Otherwise, just open UVTools, drag the .cyber file on to it, and it will Analyse it. You can then look through each layer.

I think 2.5s exposure looks about right. You could try printing tests in 2.3-2.7 range to fine tune it, but I think it looks okay. Try printing updated Towns and cones to troubleshoot other settings. I do recommend reading this about raft heights and bottom exposure times. This article is also a good read to find out about wait times and how to use UVTools to adjust some parameters that Chitubox can't.

I would dial down your lift speed. I personally follow the advice of people like Ameralabs and don’t use TSMC. To me it looks like the model is pulling away from the supports when your fast lift speed kicks in because it’s still attached to the FEP. If your Saturn 2 is anything like my S8K, acceleration is also probably coded high from the factory. I followed this advice https://github.com/sn4k3/UVtools/wiki/Rest-times-and-TSMC I’ve only been running test prints to improve my print quality, and haven’t printed anything as big as you are printing yet, but the reasoning is sound.