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If you can turn the motor by hand (i.e. it is not already built into a big machinery
where you cannot reach the motor shaft) you should be able to turn your motor
by hand. If you now connect two motor wires together two different things can
happen:
You can still turn the motor with the same ease as without connecting
the wires. This is a sign that you are connecting two wires of different
phase.
When you turn the motor you can feel some dents. The motor provides
a step like resistance against turning. This is a sign that you connected
two wires of one phase -voila. The other two wires must belong to the
other phase.
Alternatively you can of course measure the resistance between the wires. You
should read two connections with a resistance pretty close to the specified coil
resistance. All other connections should give you an unconnected reading (0L
on most multimeters).
If you have found and connected the two motor phases of your stepper motor
properly you are ready to go.
Do never ever disconnect the motor wires while the TOS-100 is powered.
if you change anything in the motor wiring first disconnect the TOS-100
and Arduino power . Else you most probably damage the TOS-100, your
Arduino or even your USB port in a worst case scenario.
If you are driving an unipolar motor in a bipolar way you must not connect the
middle tap of the motor and ensure that this wire cannot touch anything (e.g. by
insulating it properly). You can recognise the middle tap of your unipolar motor
since it has half the resistance than the other two wires of the motor phase.
Installing the TOS-100 driver in Arduino
On Github you can download the TOS-100 Arduino Library. Don‘t be confused
it is called TMC26X Arduino Library, since you can use it to drive any
TMC260/TMC261/TMC260 chip. Unzip the library. You should get a folder
called TMC26XStepper. copy that into the library directory in your Arduino
folder. If you do not know how to locate it and how or why you should do it there
is a good explanation on the Arduino web site.
After you have installed the library you need to restart the Arduino IDE so that it
can find the new driver.
Testing your motor with the TOS-100 Stepper Driver Shield
The TMC26X driver comes with two example programs:
1. The ,TMC26XExample‘ sketch is very simple example how you can use
the TMC26X Library in your Arduino project.
2. The ,TMC26XMotorTester‘ sketch is sophisticated test and analysis
program for your stepper motor and probably the best way to begin.
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