Have view folders by icon instead of category enabled, folder options,view, check Show hidden files and folders) 23. Make sure your computer is connected to the printer via usb cable 26.Add a jumper to the BOOT pins on the printboard (back of the printer) or bend the 2 pins so they are touching , then press the RESET button 27.Click Tools, Board (might say Board: Arduino Uno) and select the Teensy 2.0 8.
In the top arduino menu, click Sketch, then Verify/compile 18.
If you installed Teensyduino, it will pop up a window, just close it 19.
find #define HEATER_0_MAXTEMP 225 (line145) change to #define HEATER_0_MAXTEMP 300 16.
350C is the max the thermister can is good for, the hotend can go higher, but you’ll need a thermocouple instead of the thermister 17.
Your printer will be the one listed as “USB serial port (Com X) write down whatever the x is, and put it in step 8) 9. Browse to the folder you extracted in step 5, select the file (in the marlin folder) named Configureation.