legend21 Posted November 24, 2024 Share Posted November 24, 2024 I hope someone can help me...My onboard expression was working just fine but started squeaking so i watched a video on how to take it apart, clean and lubricate and then reassemble. Im pretty sure i put it back together properly but when i fired my Helix up the expression pedal no longer sweeps. I ran the test and all other functions including the toe switch test out fine. I feel like i may have missed something when putting everything back together and was hoping someone has had the same experience and can tell me what to do to fix it. Quote Link to comment Share on other sites More sharing options...
Schmalle Posted November 24, 2024 Share Posted November 24, 2024 The expression pedal works optically: the angle of the pedal is determined by the amount of reflected light. To achieve that an LED emits light that gets reflected by a white surface (at the end of the metal bar on the pedal) and is picked up by a photo detector. Something in that mechanism doesn't work. Do you see that "sensor light" when Helix is on? Is the surface white, above the sensor and reflecting the light? Don't touch anything in side the Helix when it's on unless you know what you're doing. Quote Link to comment Share on other sites More sharing options...
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