Yaskawa MP940 Reference Manual - Manual (Page 428)

MotionSuite™ MP940 Machine Controller Reference Manual Position Control
11-31
Note: Set the minimum command unit in fixed motion parameter number 18 “Number of Digits
Below Decimal Point”.
Electronic Gear Ratio
With regard to the command units input to the module, the mechanical
motion units are called “Output Units”. Electronic gearing is a function
that converts position or speed units from command units (mm, deg, inch)
to output units (mm, deg, inch). In a machine configuration in which the
load axis rotates amount “n” when the motor axis rotates amount “m,”
“command unit = output unit” can be assumed by using this electronic
gearing function.
Set the electronic gearing function by the motion setting parameters in the
following table.
Note: The electronic gearing function is disabled when the unit selection is pulses, or when
motion commands (OWC020) are not used.
Unit
Number of Digits
Following Decimal Point
Bits 0 ~ 3 of Fixed Motion Parameter 17 “Motion Controller
Function Selection Flag”
Pulses (= 0) mm (= 1) deg (= 2) inch (= 3)
0 1 Pulse 1mm 1deg 1inch
1 1 Pulse 0.1mm 0.1deg 0.1inch
2 1 Pulse 0.01mm 0.01deg 0.01 inch
3 1 Pulse 0.001mm 0.001deg 0.001 inch
4 1 Pulse 0.0001mm 0.0001deg 0.0001inch
5 1 Pulse 0.00001mm 0.00001deg 0.00001 inch
Fixed Motion Parameters Name/Meaning
Bit 4 of No.17 “Motion Controller
Function Selection Flag” Electronic Gearing Selection (0: Disabled/ 1: Enabled)
Disabled when “pulses” is selected for the unit selec-
tion. Set to “Disabled” (0).
No.19 “Distance Travelled per
Machine Rotation” Distance Travelled per Machine Rotation
This parameter setting is disabled when “Disabled” (0)
is selected in the electronic gearing selection.
No.21 “Servomotor Gear Ratio” Servomotor Gear Ratio
This parameter setting is disabled when “Disabled” (0)
is selected in the electronic gearing selection.
No.22 “Machine Gear Ratio” Machine Gear Ratio
This parameter setting is disabled when “Disabled” (0)
is selected in the electronic gearing selection.