Bambu Lab X1 Carbon fast start + end gcode

Start + End Gcode for the X1 Carbon that significantly reduces the time to start printing without damaging your build plate, and making sure the nozzle is well primed to give a good first layer.

The stock Gcode heats and cools the nozzle to clean it, home and do a host of other prep before starting a print that often takes over 7 minutes. If you calibrate your filaments with Orca or the new custom filament profiles in Bambu Studio, this is not necessary.

This Gcode pushes the nozzle cleaning task to the end of the print avoiding the need for heating and cooling cycles during the start process. It will bed level if you ask it, but that's all other than changing filament if necessary. Filament is not pulled back after a print so subsequent prints with the same filament start in around a minute which is only a little longer than it takes for the nozzle to get to temperature. If a filament swap is needed it does a rapid pulsed purge inspired by @DzzD fast filament change efforts on github which adds another 40s or so.

There are faster options posted by others, but for me this is a good compromise between speed, safety and reliability.

I've been using this for many months now and have tested it with most typical materials in a large variety of scenarios with good success. That along with some helpful feedback has gotten almost all the kinks have been ironed out and it's at a point where in my view it is no longer in the experimental phase.

That being said, use at your own risk. All machines are not equal, so if you chose to use it I suggest watching carefully to begin with to ensure it's behaving properly for you. You assume responsibility for using this gcode - it's not my fault if your molten printhead flies out of the printer and embeds itself in your body or belongings.

Cube by @thrutheframe

Reorganised startup order to optimise print start time without sacrificing quality