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Tag touch probe signal

Debounce, Pull-Ups, and Noise Filtering for Touch Probes (How to Stop “Ghost Triggers” Without Killing Accuracy)

Touch Probes

Touch probes are honest sensors living in a dishonest environment.

They’re trying to tell your control one simple truth—“I touched something”—while spindle drives, VFDs, servos, coolant pumps, and cable trays are doing their best impression of an RF transmitter.

So when probing gets flaky, people argue about the probe first. But in a lot of shops, the probe is fine—the signal conditioning isn’t.

This blog is a practical, shop-smart guide to three things that decide whether your probe input is rock solid or haunted: