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Help with Receiver/Transmitter and attaching motors? Answered


I have a GWS 2.4GHz transmitter and receiver, seen here.
http://www.robotmarketplace.com/products/0-GWRX4SB.html
http://www.robotmarketplace.com/products/0-GWS24TR.html
Essentially, I am attempting to make a sumobot with two motors taken from an electric screw driver (two wires positive and ground) The receiver is marketed for model airplanes, but I was assured it also works with motors. I am unsure what to plug into where. The receiver has three pins per channel: positive, ground and signal. Does anyone know how I should set this up?

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-max-

4 years ago

You should research the operation of the Tx and Rx. Essentially, those 4 channels (up/down & left/right on the right hand gimble/joystick, and the same for the other gimble) will send data to the receiver and the receiver will have 4 PWM or PPM outputs that can be used to control anything, like the speed of a motor or the position of a servo motor. With that cheap remote, the output is probably just PWM.

Drill motors are large and require a large amount of current. You will need to feed the signals from the Rx to a 'control' board which will translate that to a voltage for a motor. Then you may need a motor controller that can power the motor in CW rotation, and CCW rotation based and speed control based on the signals.

From what I find, it looks like what you can do it set the UP/DOWN on the left gimble to control the left wheel, and the UP/DOWN on the right gimble to control the right wheel. You could also make a more sophisticated program which will power both wheels at equal speeds until the LEFT/RIGHT on one of the gimbles is offset, and will cause one wheel to go faster and the other to go slower. That would make the bot turn.

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SpaceShipOne

5 years ago

I suggest you look up BaneBots. The sell RC speed controllers that function in both forward and reverse. They also feature a neutral lock that will not arm the motor unless it is receiving a neutral signal (essentially center stick on your typical RC transmitter). I have used these in several applications with great results.

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adam 101

7 years ago

you could use something like a h - bridge motor circuit but you will need to make sure you have high enough rated components. without proper documentation I cannot know how to attach it. I see that this is an old thread but I felt it needed resolving.

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rickharris

8 years ago

A screw drive motor may well draw over 1.5 amps when loaded I don't think that Rx will drive that directly - almost ALL rc combinations are intended to drive servo motors.

They will produce either a digital signal proportional to the transmitter input at their outputs for a digital servo or analogue varying pulse width for standard analogue servos - where pulse width is proportional to transmitter output pulse with/stick position.

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rickharrisrickharris

Answer 8 years ago

back to what i said - you need 2 servos modified to rotate continuously they aren't going to cost the earth.

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rickharris

8 years ago

I suggest you need to get 2 aircraft servos - Modify them for continuous rotation (plenty is web pages to show how.)

The servo will then plug direct into the receiver and do what you want.

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gotparsleyrickharris

Answer 8 years ago

Unfortunately, we have already purchased the materials and are on a tight budget (high school team). We bought the stuff under the impression that the stuff would work as set up. I can attach the sheet that recommended electric screw driver motors with the given receiver if that would be helpful.