I went back and looked through your print logs and it looks like the autofocuser trouble you’re having is related to the materials you’re trying to print on, a lot of them are fairly thick.
You can print on objects up to 2" thick by removing the crumb tray. However, your Glowforge can’t focus too far down, so you may need to put something laser-compatible underneath your material to lift it up. Raise it until the top surface of your material is between 1.5" and 2" (50 mm) high, measured from the metal plate on the bottom.
Our community has developed some great Tips and Tricks, and this illustrated guide might be just what you need.
Please let us know if you still run into trouble and we’ll be happy to investigate further.