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12 DATA USED FOR POSITIONING CONTROL
12.3 Basic Setting
Basic parameters1
This section describes the details on the basic parameter 1.
n: Axis No. - 1
[Pr.1] Unit setting
Set the unit used for defining positioning operations. Choose from the following units depending on the type of the control
target: mm, inch, degree, or pulse. Different units can be defined for different axes.
Different units (mm, inch, degree, and pulse) are applicable to different systems:
• mm or inch: X-Y table, conveyor (Select mm or inch depending on the machine specifications.)
• degree: Rotating body (360 degrees/rotation)
• pulse: X-Y table, conveyor
*1 When you change the unit, note that the values of other parameters and data will not be changed automatically.
After changing the unit, check if the parameter and data values are within the allowable range.
Set "degree" to exercise speed-position switching control (ABS mode).
[Pr.2] to [Pr.4] Electronic gear (Movement amount per pulse)
Mechanical system value used when the Simple Motion module performs positioning control.
The settings are made using [Pr.2] to [Pr.4].
The electronic gear is expressed by the following equation.
*1 When positioning has been performed, an error (mechanical system error) may be produced between the specified movement amount
and the actual movement amount.
The error can be compensated by adjusting the value set in electronic gear.
Page 225 Electronic gear function
• The result of below calculation (round up after decimal point) is a minimum pulse when the current feed
value is updated at follow-up processing. (The movement amount for droop pulse is reflected as the current
feed value when the droop pulse becomes more than above calculated value in pulse unit of motor end.)
Number of pulses per rotation (AP) / (Movement amount per rotation (AL) Unit magnification
(AM) 3375) [pulse]
Refer to the following for the follow-up processing.
Page 302 Follow up function
Item Setting value, setting range Default
value
Buffer memory
address
Value set with the
engineering tool
Value set with a
program
[Pr.1]
Unit setting
0: mm 0 3 0+150n
1: inch 1
2: degree 2
3: pulse 3
Movement
amount
per pulse
[Pr.2]
Number of pulses per rotation (AP) (Unit: pulse)
1 to 200000000 1 to 200000000 20000 2+150n
3+150n
[Pr.3]
Movement amount per rotation (AL)
The setting value range differs according to the "[Pr.1]
Unit setting".
20000 4+150n
5+150n
[Pr.4]
Unit magnification (AM)
1: 1 times 1 1 1+150n
10: 10 times 10
100: 100 times 100
1000: 1000 times 1000
[Pr.7]
Bias speed at start
The setting value range differs according to the "[Pr.1]
Unit setting".
0 6+150n
7+150n
=
Number of pulses per rotation (AP)
Movement amount per rotation (AL) × Unit magnification (AM)
Electronic gear
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