Skip to main content

Alarms

image.png

This machine's configuration has been optimized for maximum versatility and precision:
  • Originally equipped with home/limit switches and hard stops
  • Modified to accommodate larger parts by extending axis travel

Key changes:

  • Repurposed switches:
    • Now function solely as home switches
    • Work in conjunction with absolute encoders for accurate positioning
  • Implemented soft limits:
    • Provide adjustable stop points before reaching hard limits
    • Some soft limits set close to hard limits for maximum part size capacity
These modifications allow the machine to:
  • Process larger parts than initially designed for
  • Maintain precise positioning and safety features
  • Offer flexible, adjustable working envelopes

The combination of home switches, absolute encoders, and soft limits ensures both extended range and operational safety.

While the machine is now capable of handling these large parts, operators should remain vigilant and follow proper procedures to avoid triggering limit-related alarms.

Operator awareness:

  • Exercise caution when running large parts
  • Be prepared for potential alarms related to part size
  • Ensure proper part setup and alignment to minimize risks

RapidPath or RSI position errors;

Servo drives control motion by commanding steps or pulses of motor shaft rotation. This precise control relies on a feedback mechanism that reports actual motion back to the servo. Here's how the system works and why position errors occur:

  1. Command and Feedback Loop
  • The servo drive issues motion commands in discrete steps.
  • A feedback device (e.g., encoder) reports actual motor movement.
  • The servo continuously compares commanded vs. actual position.
  1. Position Error Detection
  • A fault occurs when the gap between commanded and actual position becomes too large.
  • Typically, this threshold is around one full motor shaft rotation.
  • This safeguard prevents potential physical damage to the machine.
  1. Causes of Position Errors
  • Physical obstructions blocking the intended motion
  • Mechanical issues within the system
  • Electrical problems affecting motor performance
  1. Error Reporting
  • The servo will halt operation and report a position error.
  • The fault message includes the name of the affected axis.

By monitoring these position errors, operators can quickly identify and address issues, ensuring smooth and safe machine operation.

Back to top