So set a maximum speed and do a test move along an axis, but make sure your host doesn’t artificially slow it down. I personally have spent the past six months hunting down extruder issues only to find out the problem was my E acceleration was way too high. Line 330 Onwards. When I turn on the printer, connect to Pronterface and issue a G1 X10 y10 z10 E10 command everything works fine. Print quality was no different than 60mm/s. Let us help you find the perfect settings. I know there are default max feedrates but I'm not seeing a default set feedrate. X/Y Axis movement speed: 120mm/s. You can also move the printhead to a position by using the G1 command with the desired position along the axis in mm and the desired speed in mm per minute, so that’s 60 times the speed you’d set in your firmware. A firmware is the software which converts machine instructions (gcodes) into actual movements. #define DEFAULT_MAX_FEEDRATE {500, 500, 5, 25} // (mm/sec) #define DEFAULT_MAX_ACCELERATION {9000,9000,100,10000} // X, Y, Z, E maximum start speed for accelerated moves. Why does Marlin by default change the print speed when turning the LCD dial? */ # define DEFAULT_XJERK 10.0 # define DEFAULT_YJERK 10.0 # define DEFAULT_ZJERK 0.3 # define DEFAULT_EJERK 5.0 Example. I’ve always considered it weird that on the top level of the marlin LCD, if I turn the dial, I can fine adjust the speed of printing. This makes it very hard for someone who has never configured Marlin before to set sane values. When the z axis homes , it touches the endstop and moves up and homes again , but when moving down to home the second time , it moves extremely slowly , it takes 1 minute to hit the endstop again. A typical line of (depositing) G-code seems to set a maximum speed (F), a new position to move to (X, Y, Z) and a new extrusion distance (giving a filament distance for the move).The F is common for the line of code, and I understand gives a maximum for the XYZE combined speed.. My question is: "How is the extrusion rate synchronised to the movement distance and speed?" Discussion. ... Baudrate is the speed of the serial connection, by default 115200 or 250000. Support structure underspeed: 80%. Oftentimes in Marlin, speed or acceleration are expressed in [mm/s] or [mm/s2] but the feed is expressed in [mm/min]. @thisiskeithb - tagging since you contributed the original profile for this printer Description Stock Marlin 1.1.9 with Ender 3 defaults results in fairly violent homing, causing the X and Y axis end switches to bottom out. Solid Infill Underspeed: 60%. Set max acceleration in units/s^2 for travel moves (M202 X1000 Y1000) M203 - Set maximum feedrate that your machine can sustain (M203 X200 Y200 Z300 E10000) in mm/sec. #define NUM_AXIS 4. The current default values are: Movement settings Define the number of axis. Stock Ender 3 will handle that no problem, I sling around a 1/4" thick bed at 1500 accel no problem at that speed. This is the moving speed of the axis when homing in [mm/min]. M204 - Set default acceleration: S for print and retract, R for retract moves, T for travel moves (M204 S3000 T7000) in mm/sec^2. Default printing speed: 100mm/s. * When changing speed and direction, if the difference is less than the * value set here, it may happen instantaneously. In configuration.h the default values for acceleration and jerk are insane. Higher speed means information can be transferred faster between PC and It is the total number of axis (3) plus the number of extruders (1). Z Axis movement speed: 16.7mm/s. 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