Fujitec MO-1330 - Page 15

■ Electric screwdriver torque measurement.
①Definition of dynamic / static torque
※Static torque (Theoretical torque ) : means torque generated through motor's electrical energy ( Stall torque of motor )
※Dynamic torque ( Fastening torque ) : means torque generated at screw fastening.
(Stall torque of motor plus torque generated by inertial energy of motor rotor)
Type
How to measure
Torque waverorm
static
Torque
( TS)
Torque
inverter
Electric screwdriver
Input
Connector
Ampli-
fier
Electro-
magnetic
oscillo
scope
Record
Tp
(Max
torque
Ts
(Static
torque)
Type
How to measure
Torque waverorm
( TD ) Torque
Torque Checker
Actual screw fastening
Electric
screwdrive
Torque
Input
Input
Peak indicator
Electric
screw
driver
Electro-
magnetic
oscillo
scope
Record
※Tapping screw
※Machine screw
plastic
lron board
Dynamic torque
Dynamic torque
Dynamic torque
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