LS ELECTRIC L7NHF Series, User Manual

Page: 128 / 409

5. Drive Application Functions
5-20
(A) 5000 ppr encoder (B) 19-bit (524288 ppr) encoder
When the electric
gear
is not used
5000*12/10 = 6000 524288*12/10=629145.6
Different commands should be given to the encoders (motor) used for the same
distance movement.
For a command given in the minimum user unit of 1 um (0.001 mm)
Electric gear
setting
Electric Gear Numerator 1 =5000
Electric Gear Denominator 1 = 10000
Electric Gear Numerator 1 =524288
Electric Gear Denominator 1 = 10000
If the electric gear
is used
Movements can be made under the same command of 12000 (12mm= 12000*1um)
regardless of the encoder (motor) used.
(2) When the output frequency of the upper level controller or input frequency of the drive is limited for
driving a high-resolution encoder at a high speed
-
The output frequency of a general high-speed line drive pulse output unit is approximately
500Kpps, and the possible input frequency of the drive is approximately 4Mpps. For this reason,
when driving a high-resolution encoder at high speeds, be sure to use an electric gear for proper
driving due to the limitations of the output frequency of the upper level controller and the input
frequency of the drive.