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Encoder Resolution

Quadrature decoding gives 4 counts per pulse, so a 1000 PPR encoder resolves 4000 positions per turn. Check the output frequency at top speed — it is the usual reason counts get missed.

Pulses per revolution (PPR)

Decoding

Maximum speed (rpm)

Linear travel per rev (mm)

Gear ratio after encoder

Counts per rev

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Angular resolution

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Linear resolution

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Output frequency at max speed

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Resolution after gearing

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Make sure your counter input can handle the frequency — and that the encoder itself is rated for the speed. Resolution is not accuracy: runout, mounting eccentricity and backlash all add error.

A helper, not a substitute for engineering judgment. Verify against the governing standard.