The **MAH66TCD-R** is a high-performance, 2-phase hybrid stepping motor manufactured by **Oriental Motor**. It belongs to the **PK Series**, specifically designed for high torque and smooth operation at low speeds. Below is the breakdown of its electronic and electromechanical specifications: ### 1. Technical Specifications Table | Parameter | Value / Specification | | :--- | :--- | | **Motor Type** | 2-Phase Hybrid Stepping Motor | | **Frame Size** | 60 mm (2.36 in.) | | **Step Angle** | 1.8° per step | | **Rated Current** | 2.0 A per phase | | **Winding Type** | Bipolar (Standard for 'T' series) | | **Terminal Box** | Included (T-series designation) | | **Holding Torque** | ~1.27 N·m (approx. 180 oz-in) | | **Resistance** | ~1.4 $\Omega$ per phase | | **Inductance** | ~4.5 mH per phase | --- ### 2. Key Electronic Components & Design #### A. Winding Configuration (Bipolar) The "TCD" designation typically refers to a **Bipolar** wiring configuration using a terminal box. * **Bipolar Advantage:** Provides higher torque at low speeds compared to unipolar motors because the entire coil is energized. * **Electrical Connection:** Uses 4 leads (internally routed to the terminal block) representing two distinct phases (A, /A and B, /B). #### B. The Terminal Box (T-Series) Unlike motors with dangling lead wires, the **-T** version features an integrated terminal box. * **Protection:** Rated for higher environmental protection (often IP65-rated for the motor body). * **Connectivity:** Uses internal screw terminals, which reduces electrical noise and prevents accidental wire fatigue/disconnection in vibrating environments. #### C. Magnetic Structure The motor utilizes a permanent magnet rotor and a laminated steel stator. The "H" in the part number often signifies **High Torque** magnets, which provide a stronger magnetic flux, resulting in a higher torque-to-size ratio than standard PK series motors. --- ### 3. Electrical Requirements for Operation To drive this motor effectively, the following electronic setup is required: 1. **Stepper Driver:** A constant-current (chopper) bipolar driver is required. The driver must be set to **2.0A** to match the motor's rating. 2. **Power Supply:** While the motor's rated voltage is low (Current $\times$ Resistance), it should be powered by a **24VDC to 48VDC** supply to overcome back-EMF and maintain torque at high speeds. 3. **Pulse Generator:** An external controller (PLC or Arduino) to provide the Step and Direction signals to the driver. --- ### 4. Part Number Breakdown | Prefix/Suffix | Meaning | | :--- | :--- | | **MAH** | High Torque, 2-Phase Hybrid series | | **66** | 60mm Frame Size | | **T** | Terminal Box type | | **CD** | Winding specification (2.0A Bipolar) | | **-R** | Right-angle terminal box or specific shaft variation |