This is turning into a major time-waster. About half the time I go to start an engrave job, I’m shown the “Scanning your material” or “Preparing your design” message, and then it all disappears and I’m back to “Calibrating the head of your Glowforge.” So there goes another 3-5 minutes. I can only assume that something doesn’t like the size/resolution/whatever of my file and is crashing, but…damn. Please fix! (OS/browser doesn’t seem to matter, but for what it’s worth, I’m mainly using Mac OS [Low] Sierra with either Safari 11.1 or 59.0.2.)
The workaround is usually to just keep trying, and after three or four CTHOYGFSOD’s (Calibrating The Head Of Your GlowForge Screens Of Death), it will start the engrave.
EDIT: My current design just won’t print. Umpteen tries, and it goes: Scanning -> Preparing -> (window disappears) -> Offline -> Calibrating. I’ve laid out a tiled pattern of rather sizeable (3000x2000 pixel) grayscale PNG images, however… all but one of these is set to Ignore. If I can’t engrave a single image of that resolution without crashing the thing, I’m in trouble. If somebody from Glowforge could have a look and see what’s up, I’d be much obliged. Thanks!
EDIT #2: Removed all of the “Ignore” PNG images from the design. To no avail.
EDIT #3: I should mention that I have several times switched the 'Forge off and back on, and just tried going through Setup again, as suggested on another thread. Got stuck on the WiFi portion though; I kept getting the error about losing contact with the unit or getting an unexpected response. (101% certain I had the WiFi password correct, and switching the unit off and on again restored connectivity.)
EDIT #4: On what must have been the 40-somthingth try (I’m a masochist), it got past Preparing and let me do the engrave. I won’t declare myself unblocked, though, because 100:1, I’ll be right back at the same issue as soon as I un-ignore the next image.
Also, I hadn’t used my 'Forge in a couple of weeks, and since returning to it, I notice that the stepper motors are making all kinds of new, lower-pitched tones. They seem perky and high-pitched when the unit is first switched on, but after a print or two, they’re a few octaves lower. Probably unrelated, but seems worth mentioning.