Servo Linear Actuator (32mm Range)
thingiverse
Servo Linear Actuator v2 Designed Around Emax ES08MAII Servo The linear actuator v2 should fit other micro 9g servos, including the Emax ES08MAII. The base frame and retainer must be glued together with the actuator rod assembled. A paper clip is used to form the linkage, made of 0.8mm steel. Key Specifications: - Actuator Length: 70+32mm to 170+32mm in 10mm increments - Servo Arm Diameter: 20mm, designed for ES08MAII with a 3.8mm diameter fit - Linkage Length: 25mm (formed) - Mount Holes: 3.5mm Using the Equation Below, Travel Ranges from 0 to 32mm Can Be Solved Using Servo Angle Values Between 38.5 and 142.8 Degrees. To calculate travel range, we use the equation below, where servo angle 0° is towards retract and 180° is towards extend. Equation: P = ( L^2 - ( ( A * Sin(a) ) - X )^2 )^.5 - A * Cos(a) - Y Given Values: P = 0-32mm A = 20mm L = 25mm X = 11.9055mm Y = 8.929559mm a = 38.5-142.8° Scaling the range will have less than 0.23mm accuracy error, which is completely acceptable until we can solve for angle a. For anyone able to solve this equation, please let me know. Regards, Edit: 10-04-18 Parasolid files are posted along with an alternate version where the mounting location is further from the servo arm.
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