MoTech Closed Loop NEMA 17 Stepper Motors MoTech Motor offers premium quality closed loop Stepper Motors. HartSmart Products had these closed loop stepper motors custom made by MoTech to ensure they will work well in most 3D printers. As a part of our customizations, all of these NEMA 17 stepper motors include: 27mm shaft length Full-length D-cut for a flat side the entire length of the 27mm shaft NOTE:Closed Loop Steppers will require a Closed Loop Stepper Driver, and are not drop-in replacements for Open Loop Stepper Motors. Motor Specifications Motor Length Model # Step Angle Rated Current (Amps/Phase) Holding Torque (oz.in) Holding Torque (kg.cm) Resistance (Ohms/Phase) 48mm+20mm(68mm total) MT-1704HS200EC-1000 1.8° 2.00 83.3 6.0 1.4 60mm+20mm (80mm total) MT-1705HS200EC-1000 1.8° 2.00 114.0 8.2 2.0 Product Specifications Item Specifications Degrees Per Step 1.8° Step Angle Accuracy 1.8°±5% (full step, no load) Resistance Accuracy ±10% Inductance Accuracy ±20% Temperature Rise 80°C Max.(2 phase on) Ambient Temperature -20°C~+50°C Insulation Class B, 130°C Insulation Resistance 100MΩMin. , 500VDC Shaft Radial Play 0.02Max. (450 g-load) Shaft Axial Play 0.08Max. (450 g-load) Max. radial force 28N (20mm from the flange) Max. axial force 10N Resolution 1000 CPR Speed Range ≤3000rpm Encoder Specifications Driving Voltage 5V Current Consumption ≤50mA Output Current 0-5mA Output Method Output Differential (Line Driver Output), Two Channels Response Frequency 0-20KHz Working Tem. --25℃-85℃ Working Humidity 30-85% (no condensation) IP Protection IP20
