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Questions tagged [rcservo]

An rc or hobby servo is a closed-loop servomechanism, typically used in radio control model, hobby or small-scale robotics applications. It usually consists of a motor coupled to a sensor (e.g. potentiometer) for position feedback, typically using a high ratio gearbox.

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23 views

Servo malfunction

Summary I am making an automatic door for my chickens including a servo motor. In the process I actually shorted my 5V from my Arduino. The servo is powered by external batteries and only gets its ...
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TGY-6114MD Servo motor needs push to start

I currently have an inspection robot deployed in a remote part of Africa that has a failing Turnigy TGY-6114MD servo. The issue appeared randomly. The servo won't respond to commands unless given a ...
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113 views

How should I power my servo motor with the Adafruit PCA9685 chip?

So I have an Adafruit pca9685 controlling an HSB-9380TH servo and a MG-996R servo. I recently began learning about building robot so I apologize if these questions seem dumb. I literally spent a days ...
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Pwm settings of a Sg90 servo motor

I use a TowerPro sg90. 1.5 ms for the centre position 0 degree, and 2 ms pulse for +90 degree and -90 degree with a 1ms pulse. But it's definitely not looking like it goes for 90 degree or -90 ...
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2answers
542 views

Servo motor power consumption issue

I am using servo motor model no. MG995 with Arduino. I don't know the current it consumes while powered on and while lifting a 10 kg of weight. I am currently using a 5 V, 1 A power supply with one ...
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1answer
163 views

controlling 6-axis robotic arm with raspberry pi, what instructions can do this?

I have been trying to build a robotic arm using a PCA9685 servo controller, a 6-axis robotic arm, and a raspberry pi model b+. I wired them all together accordingly but I have no idea how to actually ...
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1answer
300 views

Arduino RC Kids Ride-On car: wiring help needed

I am wiring up a kids ride-on toy (Powerwheels) to control both speed and steering with an Arduino. The ultimate goal is to have the Arduino take analog inputs from the driver (steering and ...
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1answer
53 views

How can i tell if my HS-485HB Servo is an Increased Rotation servo?

Our Robotics Team (Go TuxedoPandas! ordered a mix of regular and "Increased Rotation" servos from Servo city. However,it appears only the outside packaging is marked. And only with a sticker. Is ...
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2answers
666 views

DC Servos moving randomly

First time asking a question on this Stackexchange, I hope I don't sound too dumb... My daughter saw a documentary about robots and immediately asked me to build her a robotic arm. I found a nice one ...
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2answers
25 views

How to build a working r/c crane capable of lifting 2 lbs/1Kg

Building an r/c crane capable of lifting and rotating 2.2 lbs. Have constructed the crane with a base on a ball bearing lazy-susan for rotation of 90 degrees. The question is: how to attach the crane ...
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363 views

Controlling a digital 360 degree servo

I have successfully controlled an analog 360 degree servo using a slide potentiometer, with the pot sending a 1000ms signal at one end of the pot and 2000 ms at the other. This gives me nice and ...
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1answer
73 views

Replace screws with motors!

I am new to this space and the field. Please pardon my lack of intuition or knowledge. I have a recording stand with a join in between. a pair of screws through which the whole apparatus pivots like a ...
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1answer
97 views

What happens when I connected my unpowered servo connector power wire to the powered arduino 5V pin?

I was playing at connecting wires to 'get the feel of it' when I accidentally connected the servo connector red wire to the arduino 5V pin while the arduino is connected to my comp, (and hence powered)...
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1answer
289 views

How can I use an RC servo to rotate more than 360 deg and still maintain positional accuracy?

RC Servos are great because they are low cost, widely available, easy to control, and pretty accurate. One disadvantage is that they usually have very limited range of motion. This is because they ...
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1answer
393 views

Servo coupler size needed

Hey all I would like to know what type of coupler I would need for this type of servo? The specs are: I'm guessing that the 25T means it has 25 teeth in the part that holds the adapters? So I would ...
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1answer
3k views

How to create push and pull mechanism using Servo [closed]

How do I create a push and pull mechanism using a standard hobby servo? Eg. SG-5010 Preferably without the need of 3D printing.
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1answer
452 views

Why are some motor shafts stiff while others spin freely when not powered?

Most servos and steppers I've worked with are able to spin manually when no power is applied, but I've come across a couple which are stuck in their position. I'm not sure if they are just very ...
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2answers
170 views

Biped State Space Implementation

Currently I working on a humanoid robot using inverted pendulum model and use LQR for walking stabilizer. Input u is Torque, State x is angle and angular velocity and y output is angle. I got the ...
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775 views

Mounting on servo horn

I'm trying to mount a rod on a micro servo's horn. The horn has several 1mm wide through holes. Does anyone know what sort of (tapping?) screws should be used for tapping 1mm plastic holes? Are M1.2 ...
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1answer
418 views

Mounting gear on a servo

The outputs of most hobby servos is a spline. To mount a custom gear on the spline so that the servo turns the gear, how should it be best done? I see that some people just screw the gear into the ...
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2answers
203 views

Biped Robot not getting on one foot

I am creating a biped robot with an arduino and I have the lower part of the body complete, the legs and hip joints. Before I am going to 3D print the top part of the body I wanted to make sure that ...
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2answers
582 views

Adafruit PCA9685 servo driver connected to Beaglebone Green Wireless generating erratic movement when driving multiple servos

I have a hexapod that a friend and I built this summer, but there is a big problem whenever we try to move multiple servos. When using the Adafruit_Python_PCA9685 library, I am able to move the servos ...
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Question regarding the orientation of Coxa servos in a HEXAPOD

I'm making a Hexapod robot (this is my first robotics project ever) and I'm having a hard time deciding the orientation of the servo motors on the COXA section. The hexapod I'm making is based on this ...
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3answers
2k views

2DOF arm with quick movement: Stepper, servo, or DC motor?

To make a two degree of freedom arm capable of speeds needed to play air hockey, how should the arm be controlled? I'm wondering about speed vs accuracy. The following image is from a project ...
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1answer
263 views

The 3 key components of a robot are controller, servo, and reducer. Can someone give us an “official” explanation of what they do respectively? [closed]

I've googled a lot but wasn't able to find official definitions of these 3 parts. Maybe the explanations of servo and controller are good enough, but I'm still trying to look for a more "official" one....
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1answer
169 views

Is my servo fried?

I got a new servo a few days back (RC Servo, Futaba FP-S148). I first tested it out with the Sweep sketch on Arduino, powering it with the Arduino 5v and GND pins only. It was working, just fine. ...
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124 views

What frames are supported by the Dynamixel XL-320 OLLO?

I was recently looking into purchasing either a Dynamixel AX-12A or XL-320. The XL seems to use OLLO frames, which only seem to be available in a toy-like set. I was wondering if there are any other ...
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2answers
110 views

Smart Home Model with Raspberry Pi

I'm still new to RPi and I am currently trying to do a smart home model. I planned to use RPi only to control 5 servos (which will be controlling the open/close of the doors by setting the angle) ...
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2answers
609 views

Servo motors for large scale RC car

I want to convert an electric ATV (quad) for kids (like the HIGHPER ATV-6E) to radio control for a robotics project. These small ATVs are about a meter long and weigh about 40 kg. I need to choose ...
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2answers
592 views

What is the required theory behind building a robotic arm?

I am currently planning on building a robotic arm. The arm's specs are as follows: 3 'arms' with two servos each (to move the next arm) single servo clamp mounted on revolving turntable turntable ...
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0answers
33 views

Can digital servo motors be modified for continuous rotation? [duplicate]

In an autonomous mobile robot, we're planning on using digital servo motors to drive the wheels. Servo motors usually don't rotate continuously. However, they can be modified to do so based on many ...
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1answer
149 views

Should a MG996R Servo's extreme position change over time?

This question is a follow on from my previous question, Overheating/Jamming MG996 servo. I have recently purchased my first ever servo, a cheap unbranded Chinese MG996R servo, for £3.20 on eBay. ...
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1answer
2k views

Overheating/Jamming MG996R servo

I have recently purchased my first ever servo, a cheap unbranded Chinese MG996R servo, for £3.20 on eBay. I am using it in conjunction with a Arduino Servo shield (see below): As soon as it arrived, ...
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1answer
90 views

What erector sets will function with normal servo motors?

I need a basic erector set that the parts will fit with servo motors and dc motors. Preferably below $100. I've looked at Minds-i basic set and it looks good except I don't know if it will function ...
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1k views

Can RC servo motors continually rotate?

I know that RC servo motors are designed for precise movement, rather than a D.C. motor's continual rotation. Are most RC servo motors limited to movement within one rotation or can they actually be ...
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1answer
786 views

Raspberry Pi Hexapod 18DOF, Best servo control board?

Recently I've bought a hexapod kit and 18 TowerPro MG995 servos. My objective is to apply also the Pi camera, sensors and perhaps a claw... So I've been researching and I haven't found a clear answer ...
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4answers
10k views

Wiring & driving TowerPro SG90 servos

I got my hands on a few Tower Pro SG90 9G servos but cannot find their schematics or datasheet anywhere (besides that link). I have the following concerns: Looks like they're rated for 4.8V, but ...
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1answer
447 views

What would I need to control a DC servo using a 4-20ma linear analog signal?

I'm looking to find a way to operate a small servo using a 4-20ma linear analog signal generated by a PLC in an industrial setting. The purpose of this is to allow for automation for a task that ...
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2answers
1k views

Using 20 Servos at once, with raspberry pi [closed]

I have recently been asked to review a raspberry pi hat (from a programming view) that will allow PWM control of upto 16 servos, however I am hoping to use this time to work on a hexapod idea I have ...
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3answers
420 views

Minimising lateral drift in a PID (Arduino) controlled quadcopter using a 6DOF IMU

I'm developing a stabilisation system for an 'off-the-shelf' quadcopter by using an Arduino Mega and an IMU. The IMU is reading the angle of the quad, calculating motor commands by using a PID ...
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1answer
191 views

Using hobby servo as axle

I am designing a pan-tilt camera mount using standard hobby servos. Many existing designs use the servo shaft as a revolute joint, as opposed to simply a torque producing element. As a revolute ...
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1answer
2k views

How can I power a wheel but let it spin freely when not under power?

How can I power a wheel but let it spin freely when not under power? I saw the question How can I modify a low cost hobby servo to run 'freely'? but I'm more interested in knowing if there is ...
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2answers
825 views

Finding the position of a servo

I am building a collision avoidance system for my robot. As a part of this system I am using a pan and tilt kit (http://www.robotshop.com/en/lynxmotion-pan-and-tilt-kit-aluminium2.html) My aim is ...
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187 views

Arduino Lightsensor Blocking Code

I have a GY-31 Light sensor and I am trying to make a skittle sorting machine. There is a little wheel skittles can drop into then they are turn to 90 degrees read by the light sensor then dropped out ...
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3answers
2k views

Pulse Position Modulation as used in RC controls

How are several channels multiplexed down to a single physical wire? If two channels are transmitting the same value in the same frame, wont there be an overlap of the pulses?
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992 views

How to connect a servo motor and a crank shaft

I have a standard 5v I am using the horn it came with it, I mean this piece: Like the long arm in the middle. Each of its holes are 1mm diameter. Then I have a 3d printed crankshaft I did: Its ...
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3answers
5k views

Controlling digital servos

Many websites say that analog servo motors work on 50Hz and digital servo motors work on 300Hz. My question is, does this difference apply only to the inner control loop of the servo or does the user ...
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1answer
88 views

What to use as electrovalve?

I want do make following installation (blowing bottle tops as music instrument): ...
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1answer
402 views

What approaches should I consider to create rotating a turret

First a bit of background, I am planning to make a highly maneuverable airship controlled by four thrust vectored propellers. I don't want to rely on a rudder and forward momentum for turns but ...
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2answers
73 views

Building A Servo Tester To Measure Peak/Stalled Amp Draw

Since finding data on stalled and in use under load (not free) amp draw for servos seems impossible, I want to build/create my own servo tester. All I really want to know is how much amps the servo ...