CNC Coordinate Measurement Machine Controller

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Discussion Overview

The discussion revolves around the characteristics and measurement of tunneling in CNC Coordinate Measurement Machine (CMM) controllers, as well as the comparison of trapezoidal and S-curve algorithms in terms of performance.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant defines tunneling as a measure of how closely the probe follows a straight line path when commanded to move in several axes simultaneously.
  • It is suggested that tunneling is particularly important in scenarios where the probe must navigate through holes with small clearances.
  • Another participant notes that CNC controllers with continuous feedback of the probe position perform better in minimizing tunneling compared to simpler controllers without feedback.
  • A separate question is raised regarding the performance comparison between trapezoidal and S-curve algorithms in CNC controllers.

Areas of Agreement / Disagreement

Participants have raised multiple points regarding tunneling and algorithm performance, but no consensus has been reached on the superiority of one algorithm over the other or on the implications of tunneling in various contexts.

Contextual Notes

The discussion does not clarify specific definitions or assumptions regarding tunneling or the algorithms mentioned, leaving some aspects unresolved.

Ranger Mike
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Question - Regarding a cnc cmm controller, What is tunneling?
How is this measured? What impact does the cmm structure have on this characteristic?
 
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If you command the probe to move in several axes at once, tunnelling is a measure of how closely the probe follows a straight line path to the new position.

It can be important if you need to move the probe through holes with small clearances, etc. In other situations it doesn't matter at all.

CNC controllers which have continuous feedback of the probe position as it moves do this better than simpler types of controllers (DCC) without feedback.
 
AlephZero

excellent..I thank you for taking the time to help...
 
regarding a cnc controller..are trapezoidal algorithm better than S curve algorithm regarding performance?
 

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