Re: Is there a linear DC ESC out there?
Very nice work on the crane. I don't know any linear ESCs, but I would test using an ESC with a different PWM output frequency. A higher frequency might better emulate a linear voltage.
Have you considered testing the small ESC board inside a standard RC servo? They're designed for small DC motors with a high gear ratio and having equal performance in both directions. I would guess there's a higher chance of finding a high pwm frequency output on a board from a mini or micro servo. Open the servo, carefully pull out the insides and center the feedback potentiometer.
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