Treadmill Tops Out at 6 mph Only

Answer: Current-limit circuitry is choking output often a bad shunt resistor. UpFix recalibrates and verifies full rated speed under load.

Quick take: Current‑limit circuitry thinks the motor’s pulling too many amps and throttles output.

Checks

1. Lubricate belt to reduce drag.

2. If speed still caps, the shunt resistor or sense amplifier on the MCB is off‑spec.

UpFix methodology

• Replace shunt resistor with precision 1 % part

• Re‑calibrate current loop in firmware (if accessible)

• Confirm max speed on load dyno

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