Motor Current Control
The motor driving at a low speed may make noises during motor driving. Change the current value supplied to the motor so that the noise can be reduced.
The current value supplied can be switched by controlling I0 and I1 as follows.
| Table | Motor Current Value |
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| Motor reference set current Im = Approx. 275 mA | |||||||||
I0 | I1 |
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LOW | LOW |
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| Im | (Approx. 275mA) |
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HIGH | LOW |
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| 7 |
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| Im |
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| 10 |
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LOW | HIGH |
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| 4 |
| Im |
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| 10 |
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HIGH | HIGH |
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| 0 |
| Im | 0mA |
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| 10 |
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In each motor driving step, when the motor step time Tm (ms) is over 2.5 ms, drive the motor 4/10Im up to the time of
Drive the motor at Im (approx. 275 mA) if the motor step time Tm (ms) is 2.5 ms or less. It is not required to switch the current.
When the previous motor step time is 2.5 ms or less, drive the motor at Im (approx. 275 mA). Do not switch the current even when the motor step time Tm (ms) is more than 2.5 ms.