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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Description Price For Motor Type Current Rating Voltage Rating Board Supply Voltage Motor Supply Voltage Overall Length Overall Width Overall Depth
RS Stock No. 793-4127
Mfr. Part No.G201X
BrandGeckodrive
£135.76
Each
Units
Stepper Motor 7 A 80 V dc 18 → 80V dc - 2.5in 0.83in 2.58in
RS Stock No. 240-7920
Mfr. Part No.GSM 2
£60.13
Each
Units
Unipolar 2 A - - 9 → 40V dc 61mm 46mm 15mm
RS Stock No. 829-3553
Mfr. Part No.BS1D200P10
£128.97
Each
Units
Bipolar 2 A 36 V dc - - - - -
RS Stock No. 793-4130
Mfr. Part No.G901X
BrandGeckodrive
£28.14
Each
Units
Stepper Motor - - - - 0.835in 0.850in -
RS Stock No. 905-8780
BrandRS PRO
£131.49
Each
Units
Bipolar 4.4 A 48 V 24 → 48V - 92mm 85mm 23mm
RS Stock No. 905-8786
BrandRS Pro
£78.87
Each
Units
Bipolar 2.2 A 48 V 24 → 48V - 78mm 68mm 21mm
RS Stock No. 443-0102
Mfr. Part No.53107
£22.64
Each
Units
Unipolar 350 mA - 10 → 24V dc - 55mm 40mm -
RS Stock No. 793-4133
Mfr. Part No.GM215
BrandGeckodrive
£249.45
Each
Units
NEMA 17 to 42 Size 7 A - 18 → 80V dc 18 → 80V dc 2.5in 2.5in 0.85in
RS Stock No. 896-8553
Mfr. Part No.G250X
BrandGeckodrive
£61.38
Each
Units
Stepper Motor 3.5 A 50 V dc 15 → 50V dc 50V dc 42.55mm 33.66mm 12.7mm
RS Stock No. 829-3556
Mfr. Part No.US1D200P10
£129.95
Each
Units
Unipolar 3 A 36 V dc - - - - -
RS Stock No. 441-0265
Mfr. Part No.MSE570 EVO 2
£173.45
Each
Units
Bipolar 3.5 A - 15 → 48V dc - 160mm 100mm 35.5mm
RS Stock No. 877-7216
Mfr. Part No.STR-2M
£147.54
Each
Units
Bipolar 0.3 → 2.2 A 12 → 48 V dc - - 92.6mm 56mm 20.8mm
RS Stock No. 896-8566
Mfr. Part No.G540
BrandGeckodrive
£390.15
Each
Units
Stepper Motor 3.5 A 50 V dc 18 → 50V dc 50V dc 161.8mm 60.2mm 31.75mm
RS Stock No. 793-4121
Mfr. Part No.G203V
BrandGeckodrive
£181.85
Each
Units
Stepper Motor 7 A 80 V dc 18 → 80V dc - 2.5in 0.83in 2.58in
RS Stock No. 896-8557
Mfr. Part No.G250 Heatsink + Screws
BrandGeckodrive
£5.10
Each
Units
- - - - - - - -
RS Stock No. 126-0339
Mfr. Part No.G320X
BrandGeckodrive
£108.71
Each
Units
Stepper Motor 20 A 18 to 80 V dc 5V dc - 63.5mm 63.5mm 21mm
RS Stock No. 877-7228
Mfr. Part No.ST10-Q-NN
£318.51
Each
Units
Bipolar 0.1 → 10 A 24 → 80 V dc - - 127mm 76.2mm 44.5mm
RS Stock No. 126-0340
Mfr. Part No.G214
BrandGeckodrive
£188.09
Each
Units
Stepper Motor 7 A 80 V dc - - 69.85mm 71.12mm -
RS Stock No. 877-7225
Mfr. Part No.ST5-Q-NN
£511.77
Each
Units
Bipolar 0.1 → 5 A 24 → 48 V dc - - 127mm 76.2mm 44.5mm
RS Stock No. 455-841
Mfr. Part No.ST5-S
£355.67
Each
Units
Bipolar 5 A - 24 → 48V dc - 3.65in 3in 1.25in
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