Yaskawa MotionWorks+ Windows Software - Manual (Page 147)

MotionWorks+™ Block Reference
141
3.2.8 GEAR RATIO
Definition
This block defines the gear ratio between the main and external axes. The gear ratio can
be changed at any time whether the servo is in motion or not. To make adjustments to
the main/external relationship, use the SLAVE OFFSET block.
Properties
The main and external properties define the ratio between the two axes. The gear ratio
in MW+ takes into account the physical gearboxes on both the master and slave axes as
entered in the system properties:
• TrueExternal = Main_Output * External_InputSide * GEAR RATIO_External.
• TrueMain = Main_Input * Externa_OutputSide * GEAR_RATIO_Main.
• Main input/output is set in the MP940 System Properties.
• External input/output is set in the External Encoder System Properties.
• GEAR RATIO External/Main is set in the GEAR RATIO block.
• Example: If the motor has a 5:1 gearbox and the external encoder has a 2:1
gearbox and the master/slave is to be synchronized 1:1, then to synchronize,
enter an electronic gear ratio of 5:2.
Required Conditions
None
Property Default
Minimum
Value
Maximum
Value
Base Units
Run
Time
Main 1 -32768 32767 numerator Yes
External 1 -32768 32767 denominator Yes