Mitsubishi Electric MELSERVO-JN Series - Page 105

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4. PARAMETERS
(a) For motion in increments of 10μm per pulse
Machine specifications
Ballscrew lead Pb
10 [mm]
Reduction ratio: 1/n = Z
1/Z2 = 1/2
Z1: Number of gear cogs on servo motor side
Z2: Number of gear cogs on load side
Command input pulses per revolution: 10000
[pulse/rev]
Number of command input pulses
per revolution of servo motor:
10000
[p
ulse/rev
]
Pb=10[mm]
Z1
1/n=Z
1
/Z
2
=1/2
Z
2
1/n
CMX
CDV
= Δ 0 ꞏ
10000
ΔS
= Δ 0 ꞏ
10000
1/n ꞏ Pb
= 10 10
-3
ꞏ
10000
1/2 ꞏ 10
=
20
1
Hence, set 20 to CMX and 1 to CDV.
(b) Conveyor setting example
For rotation in increments of 0.01
per pulse
Machine specifications
Table : 360
/rev
Reduction ratio : 1/n=P
1/P2=625/12544
P1: Pulley diameter on servo motor side
P2: Pulley diameter on load side
Command input pulses per revolution: 36000
[pulse/rev]
Number of command input pulses
per revolution of servo motor:
36000 [pulse/rev]
Table
Timing belt: 625/12544
CMX
CDV
= Δθ0 ꞏ
36000
Δθ
= 0.01 ꞏ
36000
625/12544 ꞏ 360
=
12544
625
........................................... (4.1)
Hence, set 12544 to CMX and 625 to CDV.
POINT
In the linear or rotary operation, setting the following values in the number of
command input pulses per revolution (parameter No. PA05) simplifies the setting
values of the electronic gear (parameter No. PA06, PA07).
Linear operation: 100 (10000[pulse/rev])
Rotary operation: 360 (36000[pulse/rev])