#define NUM_AXIS 4. Oftentimes in Marlin, speed or acceleration are expressed in [mm/s] or [mm/s2] but the feed is expressed in [mm/min]. Outline underspeed: 40%. 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. The current default values are: Example. X/Y Axis movement speed: 120mm/s. A firmware is the software which converts machine instructions (gcodes) into actual movements. In configuration.h the default values for acceleration and jerk are insane. 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. Homing feed rate. Print quality was no different than 60mm/s. Movement settings Define the number of axis. Why does Marlin by default change the print speed when turning the LCD dial? 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?" Let us help you find the perfect settings. 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. */ # define DEFAULT_XJERK 10.0 # define DEFAULT_YJERK 10.0 # define DEFAULT_ZJERK 0.3 # define DEFAULT_EJERK 5.0 Z Axis movement speed: 16.7mm/s. Marlin is one of the more popular firmwares available. It is the total number of axis (3) plus the number of extruders (1). Support structure underspeed: 80%. When I turn on the printer, connect to Pronterface and issue a G1 X10 y10 z10 E10 command everything works fine. Stock Ender 3 will handle that no problem, I sling around a 1/4" thick bed at 1500 accel no problem at that speed. To get the most out of your Ender 3 (Pro/V2), print speed is a key factor. @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. 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. Line 330 Onwards. How do you set the default feedrates for the motors in Marlin. This makes it very hard for someone who has never configured Marlin before to set sane values. Movement variables: M202 - UNUSED IN MARLIN. ... Baudrate is the speed of the serial connection, by default 115200 or 250000. Discussion. Check the default values in the Marlin as supplied with your machine and use these to start with. Solid Infill Underspeed: 60%. Higher speed means information can be transferred faster between PC and M204 - Set default acceleration: S for print and retract, R for retract moves, T for travel moves (M204 S3000 T7000) in mm/sec^2. * When changing speed and direction, if the difference is less than the * value set here, it may happen instantaneously. I recently upgraded my prusa i3 firmware to a newer version of marlin. This is the moving speed of the axis when homing in [mm/min]. #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. Default printing speed: 100mm/s. I know there are default max feedrates but I'm not seeing a default set feedrate. 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