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.

Filter by
Sorted by
Tagged with
0 votes
0 answers
11 views

Seeking more information regarding 8-channel Digital Servo Test Controller for Mechanical Arms

I bought an 8 channel servo test controller designed for robot arms off eBay, it tests out pretty well and I'm happy with it. I'm usually pretty successful at hunting down data on these cheaper boards,...
user avatar
  • 319
1 vote
1 answer
61 views

What is the noise in this PWM signal?

I'm in the process of calibrating servos while constructing a new hobbyist robot arm. When testing the base rotation servo I noticed some unexpected noise in the PWM signal while the servo is in ...
user avatar
  • 319
1 vote
1 answer
74 views

MG996R issues with Arduino

I am working on a robot dog, and using 12 MG996R servos. I am powering the servos via a 2S LiPo battery, and I have the battery's negative tied to the Arduino's ground to prevent ground loop issues. ...
user avatar
  • 111
3 votes
1 answer
33 views

Can inferences about servo torque or applied force be made by measuring servo current drain?

I'm working on a robot arm project for hobbyist / learning purposes. One of my DIY motivations is to be able to easily add additional sensors. I've been thinking about using ACS712 linear current ...
user avatar
  • 319
0 votes
1 answer
225 views

Servo motor vibration problem

I'm working on DIY robotic arm. Robotic arm has 5 servos. The problem is that servo motors are shaking. I found different solutions but none of them works. What happens is that when I connect one PWM ...
user avatar
1 vote
1 answer
54 views

Reducing stress on servo axle

I am designing an articulated robot arm that will not need to hold essentially any weight at its end, but that will need to perform thousands of repetitions (currently using MG 996R servos, but might ...
user avatar
  • 11
1 vote
1 answer
69 views

digital servo won't seek to angle if delta between current position and target is more than ~15 degrees

My students and I are using a Hiwonder LD-220MG digital servo to position a "shoulder" on a robot. We are seeing a behavior (on every one of these servos that we test) that it won't go ...
user avatar
0 votes
0 answers
44 views

Can I use a breadboard to power multiple SG90 servos?

I am planning on using 10 Towerpro SG90 servos, which operate at 4.8V or 6V and can require a maximum stall current of 700ma. If I use a breadboard like this one (https://www.amazon.com/gp/product/...
user avatar
  • 101
1 vote
1 answer
326 views

Control a servo (two position 180-degree swing) with an On/Off switch without microcontrollers [closed]

For my application, I need to be able to control a servo with a simple on/off switch. When it's off (pulled LOW), I need to servo to go at -90 degrees and stay there - possibly for a prolonged time. ...
user avatar
1 vote
1 answer
115 views

How to balance a humanoid robot on one feet?

For a school project, I have designed and assembled a bipedal humanoid robot. The robot is roughly $54$cm tall, with the width(distance between two legs) at $20$cm. The parts that make up the robot ...
user avatar
1 vote
3 answers
220 views

I wanna make a raspberry pi car using an RC car. I would like to know if the servo multiplexer is necessary?

So I'm working on a project and it involves making a raspberry pi car, be it from scratch or with the help of can rc car. I chose the latter. Now the problem is I don't really have servo multiplexers ...
user avatar
0 votes
0 answers
32 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 ...
user avatar
  • 1
1 vote
0 answers
85 views

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 ...
user avatar
1 vote
1 answer
1k 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 ...
user avatar
-1 votes
1 answer
65 views

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 ...
user avatar
2 votes
2 answers
5k 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 ...
user avatar
-1 votes
1 answer
437 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 ...
user avatar
3 votes
1 answer
2k 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 ...
user avatar
-1 votes
1 answer
68 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 ...
user avatar
0 votes
2 answers
2k 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 ...
user avatar
-1 votes
2 answers
41 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 ...
user avatar
1 vote
0 answers
516 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 ...
user avatar
1 vote
1 answer
85 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 ...
user avatar
2 votes
1 answer
115 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)...
user avatar
  • 21
3 votes
1 answer
973 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 ...
user avatar
1 vote
1 answer
1k 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 ...
user avatar
  • 113
1 vote
1 answer
4k 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.
user avatar
  • 113
0 votes
1 answer
1k 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 ...
user avatar
4 votes
2 answers
226 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 ...
user avatar
  • 41
0 votes
2 answers
2k 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 ...
user avatar
  • 553
1 vote
1 answer
1k 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 ...
user avatar
  • 553
1 vote
2 answers
258 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 ...
user avatar
  • 113
3 votes
2 answers
782 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 ...
user avatar
1 vote
0 answers
67 views

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 ...
user avatar
5 votes
3 answers
3k 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 ...
user avatar
  • 152
0 votes
1 answer
283 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....
user avatar
0 votes
1 answer
273 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. ...
user avatar
1 vote
0 answers
139 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 ...
user avatar
1 vote
2 answers
117 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) ...
user avatar
0 votes
2 answers
971 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 ...
user avatar
  • 623
4 votes
2 answers
785 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 ...
user avatar
2 votes
0 answers
36 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 ...
user avatar
  • 21
4 votes
1 answer
194 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. ...
user avatar
  • 1,284
4 votes
1 answer
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, ...
user avatar
  • 1,284
-1 votes
1 answer
120 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 ...
user avatar
9 votes
3 answers
3k 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 ...
user avatar
  • 1,284
0 votes
1 answer
920 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 ...
user avatar
0 votes
4 answers
11k 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 ...
user avatar
  • 219
0 votes
1 answer
705 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 ...
user avatar
0 votes
2 answers
2k 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 ...
user avatar
  • 111