Features: 1.Shorter drive gears 11mm vs 15mm 2.Hardened filament drive gears manufactured byBondtech 3.Weight reduced to ~135 grams 4.Smaller more compact dimensions (11.6% shorter) 5.New motor design offers ~40% increase in pushing force in real printing conditions and much improved acceleration performance 6.Flipped drive gears – filament path closer to the extruder center for a more balanced design and perfect fit on deltaprinters as well 7.Stainless steel filament exit guide with 0.2-0.3mm clearance to drive gears for best TPU printing experience and extreme wear resistance when using abrasive filaments. 8.High temperature resistant injected housings, GPA12 9.Machined PEEK secondary drive gear sleeve 10.Tension mechanism with grab screw design (Captive Grab Screw) 11.Mounting screws in line with filament exit path – improving housing stiffness and easier mounting 12.Perfectly aligned filament path 13.New smaller and better PTFE input coupler 14.Motor position rotated by additional 10 degrees for easier maintenance and assembly 15.Filament sensor add on with auto load and unload button add on feature 16.And many more small changes to improve mechanical accuracy and design look Basic Configuration: Steps: 690 steps/mm @ 16 micro-stepping Max. instantaneous speed change (jerk): 600mm/min(RRF), 10mm/s (Marlin) (recommended 300/5) Pressure advance: 0.02~0.03s - to be calibrated Retraction: 1~1.5mm - to be calibrated Retraction speed: 120mm/s, reduce it to 30mm/s when printing TPU Motor current: 1.2A Peak or 0.85A RMS (LDO-36STH20-1004AHG) Max. acceleration: 10000 mm/s2 * Normal motor operating temperature: 65-75°C Drive motor with stealth chop disabled Extrusion performance: Optimized the motor design to maximize its torque in the speed range the extruder needs it. The result is ~40% increase of the pushing force in real printing conditions. Retraction speed up to 120mm/s.Acceleration up to 3000mm/s2