Omron TJ2-MC64 - PROGRAMMING Programming Manual page 275

Examples and tips
17
Because 2 /50 is a number with an infinite number of decimal digits, we can
choose the following:
Pn202 10
17
= 2
UNITS
Pn203
50 12
Therefore, the parameters are:
UNITS = 2 = 32768
Pn202 = 1
Pn203 = 15
Pn205 = 4
REP_DIST = 50
REP_OPTION = 1
With these settings, executing MOVE(50) moves the moving part 50 mm, or
one station.
Example 6
The mechanical system consists of a ball screw. It uses a servo motor with a
17-bit absolute encoder. The mechanical gear ratio of the gearbox is 1:3.
The screw pitch of the ball screw is 10mm per revolution. The total travel
distance of the ball screw is 540 mm. The mechanical measurement units
must be mm.
With the same procedure as in example 1, we have:
17
.
Pn202 2 encoder_counts
UNITS =
.
Pn203 1 motor_revolution 1 ballscrew_revolution
17
.
2 3 encoder_counts
=
10 mm
Therefore:
Pn202
UNITS
Pn203
PROGRAMMING MANUAL
10 1 1 1
17 17 17 15
= 2 = 2 = 2 = 2
2
. .
600 60 2 15 15
15
. .
3 motor_revolution 1 ballscrew_revolution
.
10mm
3 3 3
17 17 16
= 2 = 2 = 2
.
10 2 5 5
M
17-bit absolute 1:3 Gear
encoder
=
fig. 24
10mm
540mm
269