QD-2H811A 2-phase stepper driver

QD-2H811A 2-phase stepper driver is the latest all-digital stepper driver. It uses servo control theory and the most optimized control calculation. It has no concepts of “beat” and “subdivision” of the traditional driver. No matter how many steps are set, the motor current is always the accurate sine current instead of current step. That is why the stepper motor has the best performance, stability, and low-speed mute and extremely low heat productivity.

Current waveform diagram

The following are current waveform pictures of QD-2H811A and division driver tested under the same condition. Pictures are taken by the oscilloscope without any amendment.

Contrast diagram
QD-2H811A 2-phase stepper driver

Easy to use

For the conventional use of the drive, the parameters are not set, the output value of these parameters can be used, and for some special use requirements, these parameters can be changed to meet different requirements.

QD-2H811A recommended motor : 110BYG250A1/B1/C1/D1

16 gear current selection

(peak value)

















QD-2H811A 2-phase stepper driver

★ accurate sine current control brings excellent performance

★ 255 options of steps for different transmission ratio

★ automatically record the breaking point when power off

★ set the rotation direction of the motor

★ input signal 3~24V, not need to externally connect current-limit resistor

★ perfect stability, low-speed mute, extremely low heat productivity

★ 16 kinds of lock time (0.1~2 seconds)

★ set EN port to off-line mode or lock mode

★ single pulse, dual pulse

★ 11 kinds of lock current (0~100%)

★ 16 kinds of output current

★ easily set and read

★ auto run function

★ self-test ability

★ protection function

★ work on drive technology for 30 years

Weekly steps Input Power Output Current Input Signal Setting Method
200-51000step(255 gear ) AC(70-130)V
rated AC110V
3.0-8.0A(16gear) 3-24V DIP switch
Alarm Output Dimension(mm) Installation Motor
Optocoupler Normally-closed output 135*120*56 mm distance among four points 144X34 110BYG250A1/B1/C1/D1
QD-2H811A 2-phase stepper driver Wiring diagram
QD-2H811A 2-phase stepper driver Indicator Light State

Usually default parameters can normally work. When special application is needed, some parameters can be changed. Parameters include, 1. single/dual pulse (default: single pulse), 2. EN port function (default: off-line), 3. Motor direction (default direction), 4. Lock current percentage (default: 50%), 5. Lock time (default: 1s). If set parameters, before power on the driver, set sw1-4=1111.

QD-2H811A 2-phase stepper driver Set Parameters
QD-2H811A 2-phase stepper driver Set Parameters

The final interpretation rights belong to StatAi, and the above models and parameters are for reference only.