Datasheet

Model Selection

S20 options are identified according to the following model

numbering scheme:

S20-SS-MM-C

Feature

Options

SS: Stroke

15, 30, 50, 100 (mm)

MM: Motor

38 (mm)

C: Controller

B None - Motor Wires Only

S20 Controller Options

Option B – None - Motor Wires Only

WIRING:

A1 - BLUE – Motor Coil A +

A2 - RED – Motor Coil A -

B1 - GREEN – Motor Coil B +

B2 - BLACK – Motor Coil B -

WARNING: As the applied force approaches the maximum force there is greater risk for missed steps to occur.

Driver Selection and Settings

The S20 can be driven by most standard 4 wire stepper drivers. Actuonix offers the Tic T825 USB Multi-Interface Stepper Motor

Controller. This driver is easily adjustable so that you can determine the best settings for your application. The controller

supports six control interfaces: USB, TTL serial, I

C, analog voltage, quadrature encoder, and RC. Refer to the Pololu Tic T825

Datasheet for further driver specific details.

For reliable operation it is suggested that the applied force fall between 50%-75% of maximum force for a given speed.

For quiet and smooth operation at low speeds we recommend a micro step setting. At medium speeds the full step setting (1),

will provide an improvement in maximum load, while still minimizing audible noise. At high speeds we recommend Full Step

with limited acceleration and deceleration (Ramp the frequency of your step control signal). Without adequate ramping, the

actuator will not move. Note: Ramped Micro step settings can also be used at higher speeds, however this will reduce the

maximum force.

To save power on light load applications, you can reduce the constant current setting below the rated value. For higher loads

you can increase current beyond the rated value, however your duty cycle may need to be reduced to keep the motor within

the acceptable temperature range. Note: Exceeding datasheet rated values can reduce motor life, and is not covered by our

warranty.

Microstepping can be used to increase resolution, however there will be some non-linearity between microsteps, and reduced

holding force.