So when you unload a filament from the left nozzle and reload another color, it loads the new filament, purges out the old until the new one starts. It’s approximately two to three small poops of filament. You start a new print and it does the exact same thing as soon as the left nozzle comes up two too three more poops of filament. I understand it is not allot but seems like unnecessary waste. Has anyone one else noticed this and is there a fix?
Immediately printing is not possible as the printer is not capable of retracting the filament in the nozzle.
So it minimally needs to poop that much, that the cut line has moved into the melt zone before that can be done.
There are some gcode changes described in the wiki, that you can use to omit the unload if you really need that.
The amount will also depend on whether you have enabled the “Flow Dynamics Calibration Before Printing” feature.
The printer spits out the filament at the purge wiper, and then uses the eddy current sensor inside the toolhead for dynamic flow calibration.
In general, though, trying to eliminate it completely is probably missing the forest for the trees. How much are you really going to save? Maybe 1 gram on a 100 g print?
It’s like carving a sculpture out of a block of wood and worrying about the sawdust. A little material loss is just part of the process.
Sure, you can tweak the g-code, but is it really worth the hassle? You’ve got the Ferrari of 3D printers, and then you deliberately dial down the quality to save a gram of filament.
Like I said not that it is a ton of waste but still redundant and waste of time as well. The goal is to save time and filament and both seem redundant to me.
It will become more redundant if you get failed prints due to the lack of retraction at the start of your print.
It’s a choice you have to make. The solution is there as I told you.