YASKAWA MP3000 Series Setup Manual page 119

 Reference Unit
The motion control reference unit can be set to the pulse, mm, deg, inch, or μm. The reference
unit is specified in motion fixed parameter No. 4 (Reference Unit Selection). The minimum refer-
ence unit is determined by the setting of motion fixed parameter No. 5 (Number of Digits Below
Decimal Point).
Motion Fixed
Parameter No. 5
(Number of Digits
0: pulse
Below Decimal
Point)
0: 0 digits 1 pulse
1: 1 digit 1 pulse
2: 2 digits 1 pulse
3: 3 digits 1 pulse
4: 4 digits 1 pulse
5: 5 digits 1 pulse
 Electronic Gear
The amount of change in the mechanical system (i.e., the travel distance) for the input of 1 ref-
erence unit is called the output unit. The electronic gear converts positions or speeds from ref-
erence units to output units for the mechanical system without going through an actual
mechanism, such as a gear.
If the mechanical configuration is such that rotating the Servomotor axis m times results in
rotating the load axis n times, this electronic gear can be used to make the output units equiv-
alent to the reference units.
The electronic gear function is enabled when the following settings are made:
• Motion fixed parameter No. 6 (Travel Distance per Machine Rotation)
• Motion fixed parameter No. 8 (Servomotor Gear Ratio)
• Motion fixed parameter No. 9 (Machine Gear Ratio)
• The electronic gear is disabled when the pulse is specified as the reference unit.
• Set the SERVOPACK electronic gear ratio to 1:1.
Note
Motion Fixed Parameter No. 4 (Reference Unit Selection)
1: mm 2: deg
1 mm 1 deg
0.1 mm 0.1 deg
0.01 mm 0.01 deg
0.001 mm 0.001 deg
0.0001 mm 0.0001 deg
0.00001
0.00001 deg 0.00001 inch
mm
3.6 Device-specific Settings
3.6.4 Setting Machine-specific Motion Parameters
4: μm
3: inch
μ
1 inch 1 m
μ
0.1 inch 0.1 m
μ
0.01 inch 0.01 m
μ
0.001 inch 0.001 m
μ
0.0001 inch 0.0001
0.00001
Minimum
reference
units
m
μ
m
3
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