mdg_nl

There is a option to re-map the pins in "pin.h" https://github.com/Ultimaker/UM2.1-Firmware/blob/UM2.1_JarJar/Marlin/pins.h#L1159 #define X_STEP_PIN 25#define X_DIR_PIN 23#define X_STOP_PIN 22#define X_ENABLE_PIN 27#define Y_STEP_PIN 32#define Y_DIR_PIN 33#define Y_STOP_PIN 26#define Y_ENABLE_PIN 31#define Z_STEP_PIN 35#define Z_DIR_PIN 36#define Z_STOP_PIN 29#define Z_ENABLE_PIN 34#define HEATER_BED_PIN 4#define TEMP_BED_PIN 10#define HEATER_0_PIN 2#define TEMP_0_PIN 8#define HEATER_1_PIN 3#define TEMP_1_PIN 9#define HEATER_2_PIN -1#define TEMP_2_PIN -1#define E0_STEP_PIN 42#define E0_DIR_PIN 43#define E0_ENABLE_PIN 37#define E1_STEP_PIN 49#define E1_DIR_PIN 47#define E1_ENABLE_PIN 48 You just need to swap these pin numbers: #define X_STEP_PIN 49#define X_DIR_PIN 47#define X_STOP_PIN 22#define X_ENABLE_PIN 48#define E1_STEP_PIN 25#define E1_DIR_PIN 23#define E1_ENABLE_PIN 27 X_STOP_PIN needs to be the same (it's the limit switch). Edit: Keep in mind: The X stepper motor current is set by the E motor current settings ! https://github.com/Ultimaker/UM2.1-Firmware/blob/UM2.1_JarJar/Marlin/pins.h#L1214 I hope your Extruder motor can handle 1250Ma ? https://github.com/Ultimaker/UM2.1-Firmware/blob/UM2.1_JarJar/Marlin/Configuration_adv.h#L207 Regards, Marten

Hello Jonatan, I see you are from Sweden, so this is also interesting to check: Bondtech UM2 QR extruder upgrade kit I've just upgraded my UM2 with this extruder and the performance are much better. (still playing with some settings like Speed and Temp, but until now no more under-extrusion) A year ago I've swapped the default UM2 block with a "Olsson Block" and using my Fan Ducking to give it better cooling results. UltiMaker2 3DSolex Olsson Block Fan Holder V2 Olsson block kit The Olsson Block can handle a higher temp (300 degrees). I still need to play with this, to make sure all other parts can handle these temps to Like the PTFE coupler: http://3dsolex.com/product/ptfe-coupler-um2/ http://3dsolex.com/product/i2k/ A other suggestion is to start using this firmware: https://github.com/TinkerGnome/Ultimaker2Marlin/releases It's has some nice extra futures I hope this info is helpful for you. Regards, Marten