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Review Details

ITEAD Dual Step Motor Driver Shield Expansion Board Kit for Arduino - Red

ITEAD Dual Step Motor Driver Shield Expansion Board Kit for Arduino - Red

Product Review (submitted on January 14, 2015):
This board works great in the full step mode. Unfortunately I found a problem with the current limit and micro stepping features. The current sense resistors on the card are the wrong value. Without a current sense resistor, you would not have the internal constant current control function. Since micro-stepping is based on controlling/stepping to different current levels, it would not properly micro-step. You may also possibly exceed the current rating of the driver depending on motor supply voltage and motor winding resistance. This could cause damage or failure to the driver. If you really need accurate micro-stepping be prepared to replace the 0 ohm sense resistors with 0.75 ohm or greater resistors. These are R3, R4, R7 and R8 on the shield.