uno.
Uno International Ltd.
Stepper Control Board Manual
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7. Practical tips
Run any new tubing in. New tubing is very stiff and requires a lot of torque from the motor. Once the tubing has
been "softened" you will be able to run at much higher speeds without problems. We suggest 100 revolutions to
run a tube in.
Adjust the run current to the speed of rotor. If you want to run the pump very slowly, for example at the min
speed of 50 steps/sec, reduce the Run Current to 500mA. Too much current causes the motor to shudder and
the processor to overheat. In most applications you will not need a higher supply current than 1500mA. You can
set a different Run Current for each protocol you run.
When a stepper motor slips, a high pitch noise can be heard and the motor stalls. Any of the variants can cause
a motor to slip. The optimal settings of the acceleration, the initial speed and the final speed are all crucial for
the best motor run.
Setting a high speed with too high initial speed will cause the motor to slip.
In very short rotations, for example 100 steps, the motor might not reach the requested speed.
