I am building a BigBox Dual Hybrid Titan from scratch and have some uncertainties concerning stepper setup. I have the following situation: X/Y - Axis 0.9° /step (400 steps/rev) Z - Axis 1.8 °/step (200steps/rev) / Z- Leadscrew pitch 8mm E0/E1 1.8° /step (200 steps/rev) & Titan Extruders At the moment I came to following results: microsteps DEFAULT_AXIS_STEPS_PER_UNIT X-Axis 16 160 Y-Axis 8 180 Z-Axis 16 400 Titan Extruders 16 417.5 Can anyone confirm my results? Firmware: To set the corresponding values I downloaded the "Marlin-Hybrid-Dual" firmware source code. Now I am wondering, why there are only values for one extruder (E0 / 417.5) defined. #define DEFAULT_AXIS_STEPS_PER_UNIT {160,180,1600,417.5} // default steps per unit for Titan BigBox I think, the Z-value of 1600 is for the old 2mm leadscrew pitch. Regards, Franz
X - With your 0.9° motor providing 400 steps/rev driving a 20 tooth GT2 and using 16x microstepping, 160 is what I'd expect 16/(1/400*20*2) = 160 microsteps/mm Y - With your 0.9° motor providing 400 steps/rev driving a 16T GT2 pulley that belt drives a 36T on the Y drive shaft which has 20T pulleys that drive the Y carriages I expect 8/(1/400*16/36*20*2) = 180 microsteps/mm Z - If you're using the 2 mm pitch, 8 mm lead (4 start) leadscrews 400 is correct with your 1.8° motor and 16x microstepping For the Titan the ratio depends on things like filament squishiness and you really have to measure it and see. However your numbers look about right. (I'm using 408 right now) Most importantly, my hat is off to you for doing it from scratch!!! Very impressive
Hello Ephemeris, thank you, now I have more confidence in my setup. But I still wonder, why there is only one parateter for the extruders in the dual software. #define DEFAULT_AXIS_STEPS_PER_UNIT {160,180,1600,417.5} // default steps per unit for Titan BigBox Thank you for your complimnet. I underestimated the work a little before beginning, but now I am comming to the end. At the moment I am struggling wit a ERR MINTEMP Message at power up, but I have to do some investigations, before I can ask seriuos questions. Franz
