Best g-code learning path?

Decided it’s in my best interest to finally learn more about g-code. I’ve started reading the tutorial at CNC Cookbook, seems good but I’m just curious what other options a out there?

The basics are mentioned at:

The problem is Grbl’s implementation is quite limited — it’s rather tedious to hand code anything but the most basic of projects in it — definitely look into G-Sharp or some other implementation:

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I used the wiki that Will linked. I found that if I just took my gcode file and printed the first couple pages and the last page and looked up the codes being sent, it helped me understand most of what it was trying to do. Most of the commands in the middle are similar so you don’t have to print the whole thing out. That should give you a good start, I’d think.

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Thanks Will, Scott, I’m on my way…