Sorry for the horrible quality. It's more like 1:40 seconds to do 27 of them. So that's just under 4 seconds each.
The dust halo around them is the air assist making a mess. I also had the room lights off so it wouldn't get the glare on the top cover, so all in all, the video is a hot mess, but it shows the motion.
Also, it engraved about .006"-.008" deep, so it's really cooking it. I didn't waste any time trying to get any settings perfect, I just set it to 100P, 100S and hit go.