WOO HOO! Alrighty folks!! I got it fixed! Pretty sure this is the best it has ever cut since the beginning! It was in fact the sensor assembly that got nudged up. I secured it better so hopefully that won't happen again, experimented with the Z datum numbers, and then changed those numbers in the script that runs the program for the big laser. So it should all be ready to go when you start it up again.
Anyone who has been cutting larger jobs/things at specific speeds, you might want to do a few test cuts first before using your old speeds/powers, because I think you will find that you can cut through your materials faster and with less power than before. I'm thinking of you Bill and Brett.
For the few cuts I did tonight, I was able to double the previous speed and take a third off the previous power......!!!!! (For anyone interested, I was able to cut 1/8" acrylic before at 8 100 95 - and now I can nicely cut through at 18 70 65.)
Lastly, this also fixed the sighting laser's error of a few millimeters from where the laser actually fired. It seems pretty dang close right now, so the sighting laser is a decently accurate guide again.
YAY!
Elly