Panasonic Minas A4 Series - Page 309

307
[Supplement]
Supplement
Electronic gear ratio
= 5
10
0.005 x 10000 x 1
= 0.25
20
0.0005 x 10000 x 1
20
0.0005 x 2 x 1
= =
40000
1 x 2
2 x 10000
1 x 2 x 2
D < 1, hence
use 17-bit.
D =
L
∆M x E x R
Electronic gear ratio
Travel distance per command pulse (mm)
(Position resolution)
D =
F x 60
N x E
"D = 1" is the 
condition for 
minimum resolution.
Pr48 = 10000
Pr4A = 0
Pr4B = 2000
Pr48 = 1
Pr4A = 15
Pr4B = 10000
Pr48=1
Pr4A=15
Pr4B=3750
D =
Pr4B
Pr48 x 2
2000
10000 x 2
°
Motor rotational speed (r/min), N = F x x 60
E
D
17
17 2
2
15
= 50 x 60 x = 750
2
1
500000 x x x 60
10000
1 x 2
15
17 17
2
∆M = x x L
E
D
R
1
D = =
500000 x 60
2000 x 2
1
3
3
30000000
2 x 1000 x 2
15
2
1
1
1
x x x 20 = x = = 0.00133mm
3750
2
15
17
2
20
3750
1
2
3750 x 4
20
15
= =
2 x 3750
1 x 2 x 2
3750
1 x 2
2
1
17
Lead of ball screw, L =10mm
Gear reduction ratio, R = 1
Position resolution,
∆M =0.005mm
Encoder, 2500P/r
(E= 10000P/r)
Lead of ball screw, L =20mm
Gear reduction ratio, R = 1
Position resolution,
∆M =0.0005mm
Encoder, 2500P/r
(E= 10000P/r)
Lead of ball screw, L =10mm

Gear reduction ratio, R = 1
Position resolution, 
∆M = 0.0005mm
Line driver pulse input,
500kpps

Encoder, 17-bit
Ditto 
To make it to 2000r/min.
Encoder : 17-bit (E = 2
17
P/r)
Pr4A
D =
Pr4B
Pr48 x 2P
Pr4A