Hi everyone, new to the forum, got my A350 a couple weeks ago and after a thorough calibration it’s working well.
Huge shoutout to @Tone and all the other forum posts that helped me get through some of the common problems.
My background is in electrical engineering and programming, and I have an older delta printer I modified a version of Repetier for, adding in an external Z probe sensor switch, which solved quite a few problems, as it didn’t come with a z-height sensor.
I was thinking about CNC tool changes on the A350, and the paper method works pretty well, but I also have a small project box I made with an alligator clip and touch pad that turns a light on. You clip the alligator clip to the tool, and slowly lower Z until it just barely turns the light on, then you know the tool is at the right spot. The next step for me is to get that functionality as automated as possible.
I’m thinking there’s a couple paths forward:
- Like Repetier, it would be awesome if there was a way to get the touch probe to be read directly by the firmware. The 3DP toolhead has a z-height sensor built in, but the CNC would need a sensor plugged in somewhere else, perhaps via a CAN connector - but this would require significant firmware changes.
- Write a plugin for Luban or external API that automates the process. I could get the sensor status into the computer via a USB microprocessor (Arduino or equivalent). Then I could write a plugin or API to issue gcode commands that mimics the functionality of a G30 single point probe to measure the tool stick-out and adjust the z-offset appropriately.
It seems to me like the next steps will depend on the future releases of either the firmware source, or documentation for the Luban plugin system. Now that the Kickstarter has been fulfilled, I’m looking forward to progress being made on open-sourcing the firmware and adding drawings and documentation to the ecosystem, like has previously been indicated.
Has anyone seen any documentation or information already available that would allow something like this to be implemented now? I looked through the Luban source code, and writing a plugin seems almost unattainable at the moment, it would be very hacky.
Edit: Aha - I’ve found the firmware from here: FYI:Source code of Snapmaker Firmware
Will take a poke around.
Will update if I can make any further progress.