[{"data":1,"prerenderedAt":25},["ShallowReactive",2],{"content-steps-per-mm-calculator-en":3},{"about":4,"steps":7,"faq":12},[5,6],"Stepper motors move 3D printers, CNC machines and lasers in fixed steps. How many steps a millimetre takes depends on the motor (usually 200 full steps per turn), the driver’s microstepping and the mechanics: for belts the travel per turn is belt pitch times pulley teeth, for lead screws it is the lead. A 1.8° motor with 1\u002F16 microstepping on a GT2 belt with a 20-tooth pulley gives 80 steps per mm.","The calculator gives the value for Marlin (M92) and GRBL ($100 to $102), the rotation_distance for Klipper and the resolution per microstep. For lead screws it also lists layer heights that match a whole number of full steps.",[8,9,10,11],"Choose belt or lead screw.","Set the motor step angle and the driver’s microstepping.","Enter the belt pitch and pulley teeth, or the lead of the screw, or pick a common lead screw.","Put the steps per mm or rotation_distance into your firmware.",[13,16,19,22],{"q":14,"a":15},"What is the difference between lead and pitch?","Pitch is the distance between two threads, lead is the travel per turn. On single-start screws both are the same. A T8 screw with 2 mm pitch and 4 starts has an 8 mm lead, and that is what the calculator needs.",{"q":17,"a":18},"Does more microstepping mean more accuracy?","It makes motion quieter and smoother, but not necessarily more accurate: under load the motor only roughly reaches intermediate positions. The resolution per microstep is therefore more of a theoretical value.",{"q":20,"a":21},"What are “magic” layer heights?","Layer heights at which the Z axis moves a whole number of full steps. With an 8 mm lead T8 screw and a 1.8° motor a full step is 0.04 mm, so 0.12, 0.16, 0.2 or 0.28 mm fit, but not 0.1 or 0.15 mm.",{"q":23,"a":24},"Does the calculator work for the extruder too?","For the extruder the value depends on the effective diameter of the drive gear, which changes slightly with the filament. It is therefore measured rather than calculated; the [[extruder-calibration]] helps with that.",1793721092460]