FAQ: Is there an alternative explanation of the term "User Units" pertaining to Yaskawa's electronic gearing built into the Servopacks and JUSP-NSxxx option board products?
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Electronic gearing is expressed as a ratio. The result is that the position can be pulsed or commanded in logical user units, not just motor-encoder counts. Positioning in user units allows the application programmer to set position targets in realistic units rather than encoder counts.
The Ratio is expressed as B/A, where B and A are integers. 'B' is the number of Quadrature [x4] encoder counts the motor will move for a given 'A' number of commanded user units.
If B=300 and A=20, then for every 20 user units sent to the Servopack via pulses or a position command issued from an option card, the servomotor will move 300 encoder counts. If only 10 user units are commanded, then the servomotor will move 150 encoder counts.
To see the equation and further information, please see the attached .PDF file.
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