Some steps forwards, a few back. This is GC 0.81, FW master from 7/27. Downloaded GC from master, but didn’t get the portable version, so left it at 0.81.
First, the missing sprocket reappeared in a place that had been thoroughly inspected last time, both optically and magnetically, plus swept/vacuumed after the search. While it may have fallen off the adjacent lumber stack it’s possible the swamp rats are feeling anxious and returned it. The S hook was carefully closed with pliers, although I plan to find a couple small clevises and mount the ball bearing eBay sprockets when they arrive.
I attempted to update to the latest master firmware but while motor calibration worked nothing else. Reflashed back to 7/27. Looks like a cockpit error, left the Arduino IDE running in between. Exited after the second flash. Things worked lots better.
My dimensions from before were, well, weird. Motors 1235 (+/-) mm, etc. Messed up from the chain wrenching first attempt?
Restarted the machine calibration. This time it worked pretty much as expected, without the try to pull the machine apart chain tightening from last time. Got 2925.6mm, matching my metric tape (within my personal measuring tolerances, at least). It takes 6 minutes and 30 seconds to calibrate the chains, Marked with a (at least) 20 year old junkyard paint marker.
Got to step 8, cut the test marks. Invisible. Guessing that has to do with the missing bungee Z backlash device (although this could be remedied in firmware, keep track of the backlash and twirl that much extra when changing direction). Will bungee next time, just didn’t remember the old forum comments. Since there was no way to say retry without putting in some numbers I faked it. Retried, right sprocket came off. Must not have had the setscrew on the flat and it finally worked loose (just guessing, but plausible). Reinstalled and recalibrated chains (another 6 and a half minutes) just in case there was some slippage last time. Both chains measured 1667mm. Left mark was off, removed and redid. Right, interestingly, right on.
Back to calibration, this time (with some manual backlash adjustment, plus a re-Z zeroing) got usable marks. 604V/602H mm. Entered and clicked recut. It started to position the router, then quit moving. Exited back to the main screen, hit home (it did) but found it was trying to move the Z to 350mm. Hit stop. Got paged for dinner and shut everything down.
I’m using a 1/4" OSB spoil board for calibration, don’t want to mark up a $50+ sheet of 3/4 ACX. It’s probably the backlash issue (didn’t think of that until seeing the post today), but I would be nice to have an option to set the depth. No idea what’s going on with that 350mm Z move, hope it didn’t strip off the plastic button.
A couple suggestions (or maybe I messed them). There doesn’t seem to be a way to enter manual gcode commands. Is there a debug log? I couldn’t find it in the menus.
Will retry next time with the latest firmware. Probably not until Tuesday or so, paramedic shift tomorrow.