grbl-L-Mega VS mcmap

In the Grbl-L (grbl lathe version, there is also a Grbl-L-Mega version), an input pin is used to measure the spindle speed of the lathe. The same pin is used for G33 spindle synchronization threading.

The interface between the Teensy and Arduino is actually fairly simple. GRBL already has a built in spindle speed output using the Arduino PWM. The Teensy just reads the analog voltage from the spindle speed pin on the Arduino to set the speed. Similarly the output from the Teensy (the synchronization pulse) is just a digital pulse that gets picked up on the GRBL 'Probe' pin. Full details on the GRBL threading implementation are here. The spindle rpm should be reasonable stable under load since the Teensy is running a PID controller using the input from the encoder to keep the speed stable. This means that it can correct the rotational speed ~20 times per rotation.

I used a slightly modified version of https://github.com/WRIM/mcmap/releases (I modified it to properly render blocks in TMCW, as well as improved the algorithm used to only render explored caves, which is the most unique feature of this mapping tool). A more up-to-date version can be found at https://github.com/spoutn1k/mcmap/releases (this is actually the original repository, unfortunately, they removed downloads for older versions, and it is 1.13+ only).

Otherwise, the Wiki has a list of mapping tools but none seem to go back to Beta versions and one of the only ones that I know was around back then is no longer available in that form unless it was archived somewhere (MCMap, which has a forum thread for a Mac OS port from 2010 (last updated in 2012) but the original thread is no longer accessible, and was updated to 1.3.1 the last I remember, and the latest version doesn't even support pre-1.13 versions and the original GitHub doesn't list anything older, there are numerous forks but I'm not sure if any are old enough (the oldest I've looked at go back 10 years and mention 1.2, which are unlikely to support older versions due to the Anvil file format update in that version), and many don't have releases).

You could use a program like mcmap. It creates a 3D map of your world. This is usually cool if you just want a cool looking map of your world, but I guess it could also be great if youre just trying to find your old base.

You can try it with precompiled versions on github. They work in the powershell/terminal, and there is a windows interface available here: https://github.com/spoutn1k/mcmap/discussions/63.