Yaskawa MP920 Motion Module - Manual (Page 55)

2.3 Position Control
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2
„ Electronic Gear
In contrast to the reference unit input to the Module, the mechanical travel unit is called the
“output unit.”
The electronic gear converts position or speed units from reference units (millimeters,
degrees, or inches) to output units (millimeters, degrees, or inches).
When the axis at the motor has rotated m times and the mechanical configuration allows the
axis at the load to rotate n times, this electronic gear function can be used to make the refer-
ence unit equal to the output unit.
The electronic gear function is set in the motion setting parameters shown in Table 2.11.
When the unit selected is the pulse and motion commands (OW††20) are not used, the
electronic gear function is disabled.
Table 2.11 Electronic Gear Parameters
Motion Fixed Parameter Name and Meaning
No. 17
Bit 4 of Motion Controller
Function Selection Flags Electronic gear selection (0: Disabled, 1: Enabled)
• Disabled when the unit selected is the pulse. Set
Disabled = (0).
No. 19 Travel distance per machine rotation
• This parameter setting is invalid when Disabled =
(0) is set for the electronic gear selection.
No. 21 Motor side gear ratio
• This parameter setting is invalid when Disabled =
(0) is set for the electronic gear selection.
No. 22 Machine side gear ratio
• This parameter setting is invalid when Disabled =
(0) is set for the electronic gear selection.