Data Sheet

Connecting a two-phase bipolar stepper
motor with four (4) leads to the Tic.
Connecting a two-phase unipolar/
bipolar stepper motor with six (6) leads
to the Tic. The two center taps are left
disconnected.
Swapping A1 with A2 or B1 with B2 in the above diagrams just reverses the direction of
the motor. Swapping both will leave the direction unchanged.
Connecting a biploar stepper motor with eight leads
Unlike four- and six-lead stepper motors, which have a single coil per phase, eight-lead unipolar/
bipolar stepper motor have two coils per phase and give you access to all of the coil leads. You have
the option of using the two coils for each phase in parallel or in series.
When using them in parallel, you decrease coil inductance, which can lead to increased performance
if you have the ability to deliver more current. However, since the Tic actively limits the output current
per phase, you will only get half the phase current flowing through each of the two parallel coils. When
using the phase coils in series, it’s like having a single coil per phase (like the motor types discussed
above). We generally recommend using a series connection. The following diagram shows how to
connect such a stepper motor to the Tic with each pair of phase coils in parallel (left) or series (right):
Tic Stepper Motor Controller User’s Guide © 2001–2018 Pololu Corporation
4. Setting up the controller Page 23 of 150