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PSD - Load Mounted Feedback

PSD - Load Mounted Feedback

Load-mounted feedback refers to a feedback sensor such as a rotary or linear encoder that is attached directly to the load side of a motion system, rather than the motor shaft or other intermediate components. Load-mounted feedback provides direct measurement of the load’s motion, improving control accuracy by eliminating errors caused by mechanical transmission elements between the motor and the load.

PSD Hardware Requirement

The PSD supports load mounted feedback when the I/O option board is included with the drive. The I/O option board is a factory installed option that cannot be added in the field.

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Order example for load control

PSD1SW1300B2222000

[PSD1] : PSD1 [S] : Standalone Servo Drive, 1/3*230VAC Input Supply [W] : Wall Mounting [1] : Single Axis [300] : 5.0A cont / 15A peak [B] : Basic Technology [2] : Multi-Fieldbus (EtherCat/Profinet/Ethernet IP) [2] : Multi-Feedback Input (DSL, Resolver, 1Vss Encoder, TTL Encoder, Analog Hall) [02] : Option #2: I/O option board [000] : Non Customized

 

I/O Board Encoder Interface

The encoder interface on the I/O option board is a 15-pin D-Sub connector and can be utilized as an encoder input, encoder output, step/direction input command signal or as load control.

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Load Control Set-up in PSD Servo Manager

Example using 1micron linear encoder with 5mm lead ball screw stage with rotary

  1. Create PSD project for appropriate drive with I/O option board

  2. Configure Device Settings: AC Mains, Fieldbus Type and Feedback Type (for main feedback for rotary motor)

  3. Open Encoder Config from Device I/O Board menu

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  4. Encoder Mode: Select Load Control

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  5. Encoder Type: select A/B Quad Encoder

  6. Check the box for Linear

  7. Encoder resolution in nanometers (nm) : 1 micron = 1000nm

  8. Enter encoder maximum velocity rating in mm/s

  9. Click Accept

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  10. Open Load Control Config from Device I/O Board menu

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  11. Enter Values for Motor Travel v. linear encoder travel

    1. Using the default Axis increments/per revolution 10000

    2. Numerator = 10000

    3. Denominator = 5 (5mm/revolution ball screw)

    4. Result 0.2 motor revs/mm

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