Table of Contents
Advertisement
1 PRODUCT OUTLINE
Pulse encoder
(PLG)
Servomotor
1 - 7
(2) Movement amount and speed in a system using worm gears
V
Workpiece
Worm pear
Table
L
P0
Fig. 1.4 System using worm gears
In the system shown in Fig. 1.4, the movement amount per pulse, command
pulse frequency, and the deviation counter droop pulser amount are determined
as follows:
1) Movement amount per pulse
The movement amount per pulse is determined by the worm gear lead,
deceleration ratio, and the pulse encoder resolution.
The movement amount, therefore, is given as follows: (Number of
pulses output) × (Movement amount per pulse).
A =
R × n
2) Command pulse frequency
The command pulse frequency is determined by the speed of the
moving part and movement amount per pulse.
Vs =
3) Deviation counter droop pulser amount.
The deviation counter droop pulser amount is determined by the
command pulse frequency and position loop gain.
Vs
ε
=
A : Movement amount per pulse (mm/pulse)
Vs : Command pulse frequency (pulse/s)
n : Pulse encoder resolution (pulse/rev)
L : Worm gear lead (mm/rev)
R : Deceleration ratio
V : Movable section speed (mm/s)
N : Motor speed (r/min)
K : Position loop gain (1/s)
P
ε
: Deviation counter droop pulse amount
P0 : OP (pulse)
P : Address (pulse)
L
[mm/pulse]
V
[pulse/s]
A
[pulse]
K
MELSEC-Q
1 - 7
Advertisement
Table of Contents
