42 Lead Screw Linear Stepper Motor 1.5A 40mm 300mm Rod For 3D PrinterFeature:Drive mode: Constant current chopper driveExcitation mode: 2-phase excitation (2-phase four-run)、 can forward and reverse rotationSteering: AB-BC-CD-DA sequentially energizedRated current (single-phase): 1.5A DCPower supply voltage: 12-36VStep Angle: 1.8  Insulation class: B class insulationParameter: (Test conditions: test parameters measured in normal atmospheric conditions)Ambient temperature: -20 ~ 50 \u2103Relative humidity: 90% MAXMounting position: Shaft horizontal or vertical installation.Winding DC resistance (25 \u2103): 1.6Ω ± 10%Winding inductance: 3.8mH ± 20%Location torque: 18mN.m REF.Holding torque (two interlinked rated current): ≥420mN.m (I = 1.5A)The maximum load starting frequency: ≥1300ppsThe maximum no-load operating frequency: ≥8000ppsTemperature: <80KStep angle accuracy: 1.8   ± 5%Moment of inertia: 57g.cm2Motor weight: 0.39Kg \/ PC REF.Insulation resistance: Betewwn motor stator core and terminal cold insulation resistance should be greater than 100 m Ω (used with DC500V measurement).Dielectric strength: Between the stator core and the terminal should be able to withstand AC600V \/ 1S without breakdown、 leakage current is less than 1mA.Package includes:1 x 42 Lead Screw Linear Stepper Motor