How to Choose the Stepper Drive

When choosing stepper motor drivers, also known as controllers, several factors must be taken into consideration. Buyers should make sure that the motor is compatible with the driver, as there are several different types. The number of wires in the motor determines whether a bipolar or unipolar driver is required. Maximum current input and output of the motor also impact which driver to buy, as do features such as step modes, step frequency, and protection circuitry.
Step 1:  Select the voltage range
Select an operating voltage range that gives you enough margin to deal with supply pumping (when the motor acts as a generator pumping current into the supply, temporarily raising the voltage) and the various inductive spikes that occur when driving a motor.  The typical rule of thumb for a stepper is to have ~ 20% margin vs. the operating supply voltage of the motor, but depending on the use model of the motor,you may need up to 2x margin, although this is more an extreme case.  For brushed DC and stepper motor lead screw, it’s more like 1.5x to 2.5x margin. Base your selection on the recommend operating voltage range, not the total voltage.
Step 2: Select the current rating 
Stepper drivers typically drive sinusoidal currents, so consider your peak and RMS current requirements and select a driver that can handle both.  An integrated motor driver’s RMS current rating is a function of thermal performance, I.E. how much current can it handle before shutting down due to the over-temperature protection kicking in.  Typically, the higher the current, the lower the FET RDSON required.   Other variables affecting thermal performance include how efficient the FETs switch and how thermally efficient the package is at getting the heat out.  For a stepper driver, the peak current is typically set at 1.414 of the RMS current.
Step 3: Determine board space and thermal requirements
Integrated motor drivers are your smallest option, but they can’t handle as much current as a pre-driver with external FETs.  Integrated drivers also typically dump the majority of the heat into the board, so if you have a really small board, make sure it can reliably handle the heat. Look for lower RDSON ratings if you are concerned about thermal performance and for high current applications consider a pre-driver with external FETs.
Recommend Leadshine Stepper Drives
Leadshine offers three main series of stepper drives, the advanced digital EM series, digital DM series, and classic M series. The EM series stepper drives are 32-bit DSP-based and adopt Leadshine’s latest stepper control technology with many advanced features. The high performance DM series digital stepper drives are featured with extra low noise, very low motor heating, and ultra smooth motor movements at low speed. With performance and costs balanced, Leadshine’s M series stepper drives adopt pure sinusoidal control technology & anti resonance, and can offer excellent high speed performance.
Highlights
    2 phase or 3 phase
    20-80 VDC input, or direct 120/230 AC input
    Step & direction control, CW/CCW, or 0-5 DC for speed control
    Capable of driving NEMA 8 to 50 stepper motors
    Digital or analog
    Anti Resonance for excellent performance
    Low cost and high quality
    CE and/or UL/CUL certified
Conclusion
To choose the correct stepper drive, buyers must consider their budget, the intended application of the stepper motor, and the required features. Buyers should ascertain which drives are compatible with the motor in question, since some motors will not work with an incorrect drive. The required features are also important considerations.
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Buying a Stepper Motor Driver

When purchasing stepper motor drivers, also called controllers, several factors must be taken into consideration. Buyers should make sure that the motor is compatible with the driver, as there are several different types. The number of wires in the motor determines whether a bipolar or unipolar driver is required. Maximum current input and output of the motor also impact which servo driver to purchase, as do features such as step modes, step frequency, and protection circuitry. There are numerous types of stepper drives available, each with advantages and disadvantages. Choosing the right kind of driver depends on the type of task the stepper motor will be applied to, as well as the step mode requirements. Here recommend you Brand hybrid Stepper Motor by Fasttobuy.com.

 

The Leadshine Stepper drive’s performance comes from its powerful 32-bit DSP processor and associated control algorithms. These achieve smooth performance at low speeds by significantly minimising fluctuations from the desired motor speed. The leadshine am882 can also calculate the natural system frequency and apply a damping function to eliminate resonance. This yields higher speed and better motor performance; it also optimises torque and eliminates mid-range instability. And by cutting stepper motor heating losses, the driver brings energy saving benefits, together with reduced maintenance costs.

System set-up is said to be fast and simple due to the motor auto-tuning and parameter auto-configuration technology. This allows automatic compensation for the unique characteristics of any motor connected to the drive. The motor can be sized from NEMA 17 to NEMA 34 diameter due to wide input voltage coverage and a programmable output current range from 0.5-5.6A. Either two- or four-phase motors can be connected. The drive has a programmable resolution, from full step to 102,400 steps per resolution. The stepper driver’s Multistep function allows this full microstepping resolution to be applied to a standard 200-step motor, so system performance becomes smoother.

Highlights

Suitable to drive size NEMA 17 to NEMA 34 stepper motors

Supply voltage up to +50VDC

Programmable output current range from 0.5-5.6A

Programmable resolution from full step to 102,400 micro steps per resolution

Support PUL/DIR and CW/CCW modes

Over-voltage, over-current and phase-error protection provided as standard

Stepper drives always offer the cheapest solution, so use a stepper wherever appropriate. Remember these major considerations: First, does the system require position confirmation? Second: The wrong stepper drive can cause ringing, resonance, and poor low-speed performance. Third, during high speeds, stepper motors can whine. Because stepper drives have a high pole count, hysteresis and eddy current losses are also common at high speed; for these reasons, a stepper is not recommended for continuous operation above 2,000 rpm. Finally, because full current is needed to produce holding torque, step motors can get hot at a standstill.

Fasttobuy has a large selection stepper drives and controls, available in both new and used condition, and the price range varies significantly across the range.

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