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No hotend upgrade is required to print PETG on an Ender 3 (pro or any other variant). The stock hotend can be used at temperatures up to 250 ˚C, and 230-245 ˚C is the range typically recommended for PETG. I print it at 245 ˚C. You may however want to upgrade the extruder. The stock extruder lacks both torque and grip, and significantly skips/slips when ...


2

Yes you could. But, as an alternative to the Arduino Uno, it might be far easier to send a beep by G-code M300 (or here for Marlin firmware), this will bypass the need for an Arduino Uno entirely. You can even play the soundtrack/theme of Beverly Hills cop from this previous answer. You can add the (set of) G-code(s) to the "end G-code" in your ...


1

Usually the filament spool will have a range of temperatures for the best nozzle temperatures and bed temperatures to use. To answer your quesstion there are several considerations. Not all PLA's are the same and that is probably even more so with PLA+. That is where the temperatures written on the spool come in handy. Optimum temperatures will vary for ...


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