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7、Control mode 4.1.2 Velocity factor Velocity factor module will convert all the speed measuring unit at customer side into drive’s internal measuring unit as much as 0.1rpm. And at the same time, it could transform the drive’s output velocity unit (0.1rpm) into user’s velocity units. Velocity factor parameters includes a numerator and a division. Index Name 6094 h velocity factor Object Code ARRAY No. of Elements 2 Data Type UINT32 Sub-Index Description 01 h numerator Access RW PDO Mapping YES Units —— Value Range —— Default Value 1 Sub-Index Description 02 h division Access RW PDO Mapping YES Units —— Value Range —— Default Value 1 For calculating velocity factor easily, 3 parameters are defined as below … time_factor_v Ratio between drive’s internal time unit and user’s time unit. ( For min = 1/10 10min example: 1min 10min） gear_ratio reduction ratio between load shaft and motor shaft when motor’s revolution is n and load’s revolution is m，then gear_ratio = m/n feed_constant the distance of position units’ movement when load shaft rotates for one revolution. velocity factor’s calculating equation … velocity factor = numerator gear_ratio ∗ time_factor_v = division feed_constant - 31 - V.1.0
