# MC QD 1180/1181/1260 5.5A Driver

> High-Current Stepper Driver for Heavy-Load Actuators.

**Last updated:** 2026-03-07

**Source:** https://r2r.tech/products/motor-drivers/mc-qd-118011811260-55a-driver

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> High-Current Stepper Driver for Heavy-Load Actuators.

## Specifications

| Specification | MC QD 1181 | MC QD 1180/1260 |
| ------------- | ---------- | --------------- |
| Driver Type | Bipolar stepper motor driver |
| Microstep Resolution | 256 microsteps per full step |
| Maximum Motor Current | 5.5A per coil (RMS) | 5.5A per coil (RMS) |
| Driver Power Input | 24 VDC (max 26V) | 24–48 VDC (max 50V) |
| Driver Power Connector | M12 4-pin S-coded female |
| Communication | RS485 via M8 4-pin twisted pair (from SCU5) |
| Actuator Output | M12 4-pin T-coded female (bi-polar 4-wire stepper) |
| Servo Center Input | 24V NPN inductive proximity sensor (NO or NC) |
| Limit Switch Inputs | 2x normally-closed (M8 6-pin connector) |
| Housing | Aluminum wall-mounting enclosure |
| Reverse Polarity Protection | No — verify power polarity before connecting |
| Compatible Actuators | LHS-030 (up to 300 lbf), RLA Series (800–1,500 lbf) |
| Compatible Controllers | SCU5 MD / SCU5 MC(x)D / SCU5 MC(x)DIO |
| 3D Model | Download STEP file |

## Features

- High-current output up to 5.5A – drives high-thrust bi-polar stepper motors for large LHS and RLA actuators that exceed the 2A driver capacity
- Separate power supply input – M12 4-pin S-coded connector accepts 24 VDC (MC QD 1181) or 24–48 VDC (MC QD 1180/1260) from a dedicated power supply for maximum motor performance
- High-precision 256 microstep driver – constant current driver with 256 microsteps per full step for smooth, vibration-free motion even under heavy loads
- RS485 communication from SCU5 – M8 4-pin twisted pair motor communication cable; 24 VDC on the cable powers the servo center (not the drive logic or the motors)
- Automatic parameter initialization – driver parameters stored in SCU5 controller memory are loaded on every power-up
- Ramp profile generation – generates acceleration/deceleration ramp profiles based on speed and acceleration settings for controlled actuator positioning
- Electronic stroke limits – configurable step counts for electronic stroke limits protect the actuator from over-travel
- Servo center input – M8 6-pin connector supports a 24V NPN inductive proximity sensor for home/servo center positioning
- Limit switch inputs – two normally-closed limit switch inputs to restrict actuator travel; can be tied together for a single enable/disable switch via the same M8 6-pin connector
- T-coded actuator output – M12 4-pin T-coded female connector for higher-current actuator cables (distinguished from standard M12 to prevent cross-connection)
- Aluminum wall-mounting enclosure – mounts in a machine cabinet or on the machine frame close to the actuator

## Benefits

- Drive the heaviest actuators in the lineup – 5.5A output powers LHS-030 and RLA series actuators delivering 300–1,500 lbf of thrust for large unwind/rewind stands
- Choose the right voltage for your application – 24 VDC models (MC QD 1181) for moderate loads, 48 VDC models (MC QD 1180/1260) for maximum speed and thrust
- Stop losing precision under heavy loads – 256 microstep resolution maintains smooth, vibration-free positioning even at maximum thrust
- Prevent actuator over-travel damage – electronic stroke limits and hardware limit switch inputs provide dual-layer protection for expensive large-stroke actuators
- Same communication interface as the 2A driver – identical RS485 cable and SCU5 setup; operators and technicians need to learn only one system

## Applications

- Large intermediate web guides using LHS-030 actuators (300 lbf thrust)
- Terminal web guides for unwind/rewind stands using RLA series actuators (800–1,500 lbf)
- Heavy-duty web guiding in paper mills, steel processing, and heavy converting operations
- Any application requiring high-thrust stepper actuators with the SCU5 controller

**Tags:** MC QD 5.5A, Motor Drivers

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## About Roll-2-Roll Technologies

Roll-2-Roll Technologies designs and manufactures patented fiber-optic web position sensors and advanced web guiding controllers — the precision measurement and control core of modern roll-to-roll manufacturing. Spun out of Oklahoma State University's Web Handling Research Center and trusted by Fortune 500 medical, battery, and nonwovens manufacturers, our patented sensors work without recalibration at ±0.1mm accuracy up to 760 mpm — typical customer outcomes are 50%+ less downtime and payback under six months. Headquartered in Stillwater, Oklahoma, our team of PhDs, controls engineers, and industry veterans extends the sensor + controller core into complete web guide systems including stepper-motor-based linear actuators (RLA, BLA, LHS).

- Website: https://r2r.tech
- Phone: +1 (888) 290-3215
- Email: sales@r2r.tech