Stepper Motor Controllers & Indexers

Stepper Motor Controllers are current amplifiers that turn a low-current control signal into a higher-current signal to drive stepper motors. They run using a type of open-loop system that takes digital step and direction inputs by a programmable pulse generator known as an indexer. In other words, Indexers take a signal from a computer or any other control device and turn them into pulses. Drivers or Stepper Motor Controls take these pulses and transfer them into a current (motion, steps, torque, speed) so the stepper motor can move accordingly. A user is able to operate and control steps using an interface.



Types of stepper drivers



There are many types of stepper drivers, including PWM/chopper drivers, L/R drivers and recirculating chopper drivers. The two most common are bipolar and unipolar drivers.
Bipolar drives have a single winding with two leads per phase. The winding has a current that needs to be reversed so that magnetic poles can also be reversed in the correct order.
Unipolar drivers have one winding with a centre tap per phase. This means that the magnetic pole can be reversed without switching the direction of a current, so a single transistor can be used per each individual winding.


What are stepper drivers used for?



Stepper drivers typical applications are current amplifiers in stepper motors. However, they can also be used for any device that operates at more than 50–100 mA.

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Part Details Brand Stock For Motor Type Current Rating Voltage Rating Board Supply Voltage Motor Supply Voltage Overall Length Overall Width Overall Depth
Johnson Electric 53107 Stepper Motor Controller 350 mA, 10 → 24V dc Johnson Electric 106 Unipolar 350 mA - 10 → 24V dc - 55mm 40mm -
Greenwich Instruments GSM 2 Stepper Motor Controller 2 A, 61 x 46 x 15mm Greenwich Instruments 44 Unipolar 2 A - - 9 → 40V dc 61mm 46mm 15mm
McLennan Servo Supplies MSE570 EVO 2 Stepper Motor Controller 3.5 A, 15 → 48V dc, 160 x 100 x 35.5mm McLennan Servo Supplies 28 Bipolar 3.5 A - 15 → 48V dc - 160mm 100mm 35.5mm
Sanyo Denki BS1D200P10 Stepper Motor Controller 2 A Sanyo Denki 27 Bipolar 2 A 36 V dc - - - - -
Applied Motion Systems STR-2M Stepper Motor Controller 0.3 → 2.2 A, 92.6 x 56 x 20.8mm Applied Motion Systems 14 Bipolar 0.3 → 2.2 A 12 → 48 V dc - - 92.6mm 56mm 20.8mm
Geckodrive G203V Stepper Motor Controller 7 A, 18 → 80V dc, 2.5 x 0.83 x 2.58in Geckodrive 10 Stepper Motor 7 A 80 V dc 18 → 80V dc - 2.5in 0.83in 2.58in
Geckodrive G250X Stepper Motor Controller 3.5 A, 15 → 50V dc, 42.55 x 33.66 x 12.7mm Geckodrive 6 Stepper Motor 3.5 A 50 V dc 15 → 50V dc 50V dc 42.55mm 33.66mm 12.7mm
RS PRO Stepper Motor Controller 2.2 A, 24 → 48V, 78 x 68 x 21mm RS Pro 6 Bipolar 2.2 A 48 V 24 → 48V - 78mm 68mm 21mm
Applied Motion Systems ST5-S Stepper Motor Controller 5 A, 24 → 48V dc, 3.65 x 3 x 1.125in Applied Motion Systems 5 Bipolar 5 A - 24 → 48V dc - 3.65in 3in 1.25in
Geckodrive G320X Stepper Motor Controller 20 A, 5V dc, 63.5 x 63.5 x 21mm Geckodrive 5 Stepper Motor 20 A 18 to 80 V dc 5V dc - 63.5mm 63.5mm 21mm
Geckodrive G214 Stepper Motor Controller 7 A Geckodrive 4 Stepper Motor 7 A 80 V dc - - 69.85mm 71.12mm -
Geckodrive G250 Heatsink + Screws Stepper Motor Controller Geckodrive 4 - - - - - - - -
Geckodrive G901X Stepper Motor Controller, 0.835 x 0.850in Geckodrive 4 Stepper Motor - - - - 0.835in 0.850in -
Geckodrive G540 Stepper Motor Controller 3.5 A, 18 → 50V dc, 161.8 x 60.2 x 31.75mm Geckodrive 3 Stepper Motor 3.5 A 50 V dc 18 → 50V dc 50V dc 161.8mm 60.2mm 31.75mm
RS PRO 904254 Stepper Motor Controller 4.4 A, 24 → 48V, 92 x 85 x 23mm RS Pro 3 Bipolar 4.4 A 48 V 24 → 48V - 92mm 85mm 23mm
Applied Motion Systems ST10-Q-NN Stepper Motor Controller 0.1 → 10 A, 127 x 76.2 x 44.5mm Applied Motion Systems 2 Bipolar 0.1 → 10 A 24 → 80 V dc - - 127mm 76.2mm 44.5mm
Applied Motion Systems ST10-SI Stepper Motor Controller 10 A, 24 → 80V dc, 5 x 3 x 1.75in Applied Motion Systems 2 Bipolar 10 A - 24 → 80V dc - 5in 3in 1.75in
Applied Motion Systems ST5-SI Stepper Motor Controller 5 A, 24 → 48V dc, 5 x 3 x 1.75in Applied Motion Systems 1 Bipolar 5 A - 24 → 48V dc - 5in 3in 1.75in
Faulhaber MCST 3601 Stepper Motor Controller 100 mA, 9 → 36V dc, 68 x 47.5 x 13mm Faulhaber 1 Stepper Motor 100 mA 24 V dc 9 → 36V dc - 68mm 47.5mm 13mm
Geckodrive GM215 Stepper Motor Controller 7 A, 18 → 80V dc, 2.5 x 2.5 x 0.85in Geckodrive 1 NEMA 17 to 42 Size 7 A - 18 → 80V dc 18 → 80V dc 2.5in 2.5in 0.85in
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