Do not change the electronic gear ratio
Change the electronic gear ratio
Without changing the ratio of the electronic
gear to the motor, the rotating cycle is
131072 pulses (P 0-11=0, P 0-12=0).
If the workpiece is moved 6 mm in one turn,
the number of pulses needed is 131072. If the
workpiece is moved 10 mm, it will need
10/6*131072=218453.333 pulses. When the
decimal number is omitted, the error will
occur.
By changing the electronic gear ratio, the
motor needs 6000 pulses to rotate one circle.
If the workpiece moves 6 mm in one turn, the
number of pulses needed is 6 000. If the
workpiece is moved 10 mm, it needs
10/6*6000 = 10000 pulses. When the pulse is
sent, the decimal number will not be produced
and the error will not be produced.
Pulse numbers per rotation *1
Pulse numbers per rotation *10000
Electronic gear ratio (numerator)
Electronic gear ratio (denominator)
Group 2 Electronic gear ratio
(numerator) low bit*1
Group 2 Electronic gear ratio
(numerator) high bit*10000
Group 2 Electronic gear ratio
(denominator) low bit*1
Group 2 Electronic gear ratio
(denominator) high bit*10000
Note:
(1) P0-11~P0-14 is all about the parameters of electronic gear ratio, P0-11, P0-12 is group 1, P0-13,
P0-14 is group 2, but the priority of P0-11 and P0-12 is higher than that of P0-13 and P0-14. Only
when P0-11 and P0-12 are set to 0, the ratio of electronic gear P0-13 and P0-14 will take effect.
(2) When P0-11, P0-12, P0-13 and P0-14 are all set to 0, P0-92, P0-93, P0-94 and P0-95 will take
effect.
2. Calculation of Pulse Number per Rotation and Electronic Gear Ratio
Confirm the machine
specification
Confirm the deceleration ratio n:m(servo motor turns m
rotations while load turns n rotations), ball screw distance,
pulley diameter.
Confirm the encoder pulse
Confirm the servo motor encoder accuracy
Determine the actual distance or angle corresponding to 1
pulse of the controller
Calculate the command pulses
the load shaft rotates 1 circle
Based on the determined command unit, calculate the
command quantity n of the load shaft rotating for 1 revolution.
Calculate the pulses per
rotation M
Command pulse number of motor shaft rotating for 1 turn
M=N/(m/n).
Set the pulses per rotation
(P0-11/P0-12) or
Electronic gear ratio
(P0-13/P0-14)/(P0-92~95)
P0-11=M%10000
P0-12=M/10000
nN
m
M140P
130P
==
−
−
resolution
encoder
resolution
encoder
Note:
(1) In step 6, the effective priority of the number of pulses per revolution is higher than the
electronic gear ratio, that is, when P0-11 ~ P0-12 are all 0, P0-13 ~ P0-14 will take effect. In special
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