DeWalt DCD996 Service Training page 9

As highlighted in slide 9 , it is important to note that the motor will shut down
at a defined current that is measured at the micro processor. In order to
determine at which setting we are at a defined value of voltage is measured.
To give an example :
If we are at torque setting 6, it will detect this position by design, correct
voltage will be measured. The correct specification – 1.205v to 1.480v .
Within this range the micro processor will detect X voltage and therefore
cut voltage to the unit.
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Understand how the E-Clutch works