I have a TAZ 3 that has up to this point been running a hacked-up older firmware version with now-probably-unnecessary axis speed limits that were added to workaround a hardware issue. That issue’s been resolved, so I’d like to roll back to an ‘official’ version (ideally newest; I seem to recall mention of an issue in older FW that can degrade the hotend heater resistor over time). A couple days ago I updated it following the instructions at http://www.lulzbot.com/support/re-flashing-your-3d-printers-firmware .
I un-#defined the LCD support to avoid the 'undefined uint…" error everyone seems to be having (TAZ 3 doesn’t have an LCD anyhow), but otherwise made no changes apart from changing the DEFAULT_AXIS_STEPS_PER_UNIT values according to the paper shipped with the printer.
Everything seemed to go well in the update process, but when I try to print, the hotend does not reach temperature and so the print can never start. It seems to get ‘stuck’ at ~ 1/2 the programmed temperature. The definition enabled for the resistor is “#7” (the default from the downloaded FW; no change needed). Rolling back to the old FW fixes this, although if I wanted to keep using the old FW I would not be trying to upgrade
Is this a known issue? Or, is there some special trick I’m missing that isn’t mentioned in the instructions?