Data Sheet

In the other available step modes, the Tic uses microsteps instead of full steps to generate magnetic

fields that point to places between the full steps. Each microstep corresponds to 1/2, 1/4, 1/8, 1/16,

or 1/32 of a full step, depending on what step mode you choose. For example, if you choose 1/32,

then it will take 32 microsteps to move the same distance as one full step, and a motor with 200 steps

per revolution will require 6400 microsteps to turn 360 degrees. The following graph shows the coil

currents for each of the microsteps in 1/4-step mode:

Coil currents for the 16 microsteps that make up 1/4-step mode (I

1-16

In the above graph, currents I

, I

, and I

match the four full-step currents, where the magnitude

of the current through both coils is equal. All other steps point between these full steps by setting

different current limits for the two coils. The most extreme example of this occurs on steps I

, I

and I

, where the current through one coil is equal to the full current limit setting on the Tic while the

4. Setting up the controller Page 28 of 150