![]() For example, 0.2 mm (the extruder will not be able to extrude less than what you need for a line 0.1 mm long, which is reasonable). pick the number of microsteps per millimeter, or in other words how long would be a line equivalent to one single microstep, for a given layer thickness and line width (which depends on the nozzle).it should allow the stepper motor to control extrusion accurately, that means outputting several microsteps for each millimeter of print when printing at the thinnest layer height with the thinnest nozzle.it should allow you to reach the printing speed you want, so it cannot reduce too much otherwise the motor cannot spin that fast and it cannot output enough torque,.Since stepper motors get less and less torque at increasing stepping rate, maybe the answer depends also on filament viscosity and microstepping settings?Ī related answer was provided in Is E-axis steps/mm resolution limiting factor in print quality? Since I will likely need to change the extruder gears to push the filament 15x faster I wonder how to calculate the optimal gear ratio given an expected maximum linear printing speed, filament diameter and nozzle diameter. Maybe I'm already at near the max, maybe I still have a 2-3x safety margin. However, I'm not sure how far I am right now from my current maximum extrusion speed. using Klipper firmware I may likely set a higher linear print speed, so there could be another 1.2x speed factor for the filament.0.8 mm vs 0.4 mm nozzle it's another 4x speed.I would like to switch to 1.75 mm filament and sometimes use 0.8 mm nozzle, meaning that I need the filament to be pushed faster: I am using 3 mm filament with a 0.4 mm nozzle and I can print at 80 mm/s without particular issues. I don't have much more information besides the model of the motor (42BYGH4807), but the reduction ratio (NEMA stepper -> toothed gear on the filament) is about 2:1, the filament is pushed at half the circumference speed of the stepper motor gear (small on the photo). Stepper on the right, filament toothed gear inside, same size of the small stepper gear. But that configuration is only for 1 extruder and now I’m modifying it for my dual extruder with 2-in/1-out hotend setup.I have a Printrbot LC with the following extruder gears: I started with the original configuration for the Ortiber V2.2 sensors as provided on this page. ![]() That’s why I want to use the FORCE_MOVE command. The Orbiter extruder should “grab” the filament into the gears once I push the filament through the sensor (independent of the orbiter stepper currently assigned to the extruder). I’m currently modifying my printer and added a Phaetus TaiChi hotend (2-in, 1-out) with two Orbiter V2 extruders and two Ortiber V2.2 sensors. So I guess the command is accessing the stepper directly and not via the extruder it is assigned to. … it moves the stepper of “extruder” and not the “extruder_right” that I synced to the extruder. SYNC_EXTRUDER_MOTION EXTRUDER=extruder_right MOTION_QUEUE=extruderįORCE_MOVE STEPPER=extruder DISTANCE=15 VELOCITY=5 ACCEL=1000 SYNC_EXTRUDER_MOTION EXTRUDER=extruder MOTION_QUEUE=
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