I’m new to RC, so I know how to use a servo with a transmitter and receiver. I have a linear actuator in my mower application to move the transmission forward and back, but I have to manually move the linear actuator to the positions. So, when I want to put it in neutral, I have to do it manually.
How can I have the linear actuator return to automatic neutral? I’m not sure if I need a microcontroller such as an ESP32, and I’m also familiar with Python, so I’m learning MicroPython.
I think what I should do is connect a sliding potentiometer along with a motor controller? Based on this video, Arduino Linear Actuator Position Control // Linear Actuator with Position Feedback Return to Center - YouTube.
But, I’m not sure how all this works, plus I’m trying to use MicroPython
Anyone please?
The linear actuator would (obviously) need to be powered, and know where “center” is. This means the linear actuator needs built-in or external linear positioning (potentiometer) - like the video you included. If you’re using RC, and if the actuator doesn’t consume too much current (max 5A), then the Firgelli LAC is the perfect accessory to allow you to control a linear actuator with feedback via RC:
Without this then indeed, you’ll need to program your own microcontroller, use a motor controller etc.
I was watching this video on YouTube, this a real RC Corvette. My question is, how is he able to drive this Corvette while the servos are connected? Because I’m building a RC riding mower, and I’m not able to move the linear actuator with my hand, its too strong.
Linear actuators are not meant to be back-driven (imagine trying to push a nut along a threaded rod without rotating either of them), so not surprising you cannot extend or retract it by hand.
Thank you, but then how is the corvette being driven normally? Is he just disconnecting the linear actuator when its driving and connecting back when its in RC?
Don’t know, but indeed, the safest way would be to physically disconnect each actuator when a human is driving so it’s close to “stock”. I would think there would be many issues with the highway safety commission when modifying the controls of a passenger vehicle for use on public roads.
Ok thank you, I’m new to RC so I was just wondering, but it makes sense to disconnect the servos if driving the car in normal mode like you said.
Maybe he is using pneumatic actuators 
oh ok, I didn’t even think of that. Thanks
I’m converting a twin 400HP Cummins Diesel 42 ft catamaran to Tesla Model 3 motors and batteries controlled by FlySky RC. Using Linear actuators with hall sensors for positioning reversing buckets, nozzles, and throttles on jet propulsion units. [email protected]
@SEC747 Hopefully you’ll take some notes, pictures and videos and create a new ROBOT post with updates?
Thanks, I will. I do have a problem with “positioning” several 24 volt linear actuators equipped with hall sensors (quad) connected to 2x15 roboclaw motor controller. The RC compatable roboclaw does not keep memory of positioning count and is sporadic in FlySky airplane receiver interface. Do you know of a motor controller RC interface unit that is reliable? Thanks, Steve
I’ll assume DC and not exorbitant current? Roboclaw tends to work well, but if you really want to try another:
Ex: https://ca.robotshop.com/products/dimension-engineering-sabertooth-2x25
There is an add-on feedback module:
