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Questions tagged [servo]

A kind of motor with automatic feedback, such as a hobby RC servo.

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33 views

high power servo motor for an automotive enviroment

As you know already most high power servo motors in the range of 1.5Kw to 3KW and their respective drivers are AC powered and come mostly in 3phase for reasons beyond the scope of the question. But ...
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9 views

16-Channel 12-bit PWM/Servo Shield check if it is powered by adapter [migrated]

I'm using Adafruit 16-Channel 12-bit PWM/Servo Shield with Arduino Uno controller In setup() I have a number of default positions ...
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58 views

Why my servo motor is always on? [migrated]

Why my servo motor is always on? ...
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2answers
69 views

Powering a servo with 9V battery and other questions

I'm working on a small project. I want to make an internet-connected dog food dispenser to attach to my dog's crate so I can dispatch a network command remotely to dispense it. I have a Raspberry Pi ...
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2answers
54 views

How does the comparator set the motor speed at a fixed level?

How does the comparator below sets the motor speed at a fixed level? I can think that the comparator output will turn ON if the speed proportional generator output voltage is lower than the zener ...
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0answers
32 views

How this servomotor calibration is supposed to work at electrical level?

Here is the Wiring Diagram: I am trying to understand how this servo motor calibration process (see screenshot of BMW software) is supposed to work at electrical level. In particular: there is 2-pin ...
4
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1answer
587 views

Would the motor reverse if phases swapped for this case?

A servomotor power connection pins are given as follows: U V W are the three phase terminals. Would the motor reverse if I mistakenly swap phases U and V namely if I connect pin 1 to W and pin 3 to U?...
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1answer
16 views

Running MG996R servo using Eneloop Pros

Recently I just bought 2 pack of Eneloop pros, and have fully charged it. By using a multimeter I saw that the voltage went up to 1.3 ish after it is fully charged. And I'm planning on using 5 of them ...
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1answer
53 views

Servo arduino using eneloop

Say if i use 5x eneloop AA batteries to run 6x MG996R servo, will it be good enough since im afraid for the motor if it will burn out. I already read the spec sheet what im afraid is the stall current
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1answer
75 views

What can be the cause for the servo to jitter continuously while powered?

I'm using an HS-785HB servo (https://www.robotshop.com/media/files/pdf/hs-785hb.pdf) for my project. I'm working on the Mbed platform and it uses C++. The servo library I use is Servo.h and I'm ...
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1answer
54 views

Turnigy 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 started happening during normal operation and was working fine ...
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1answer
54 views

Some questions about a servo motor driver input ratings

A servomotor drive input can be supplied either 3-phase or single phase. The photo of the driver nameplate is shown as follows: Does that mean in full/nominal load if this drive is supplied single-...
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37 views

Convert 2 wire pwm signal to servo control pwm

Bit of a weird one - got a controller that has a variable 12v PWM output (~100Hz), I can't change this output as the signal controls other devices, I haven't got an oscilloscope but I belive it's ...
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24 views

Uncertainty in current values of Power HD digital servo motor

In a project, we want to lift the load of 5 kg on the ground to half a meter. For this purpose, we use a 360-degree rotating PowerHD digital servo motor with a stall torque of 20 kg / cm. Motor ...
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2answers
119 views

What is a “digital” servo motor?

ServoDatabase lists various different servo motors, and describes some as "analog" (e.g. SG90) and some as "digital" (SG92R). "Digital" servo motors are apparently better (they seem to cost more, ...
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1answer
44 views

Connect servo and dc motor to raspberry pi

I'm currently working on a project where I have build a RC car with one DC motor (forward/backward) and one servo motor (steering). I'm a newbie with electronics so I figured out by myself I needed a ...
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2answers
44 views

How to choose proper power supply for 8 servos on Adafruit shield with Arduino Uno controller

I use Adruino Uno micro-controller powered with USB 5V from PC and Adafruit 16-Channel 12-bit PWM/Servo Shield on it with 1000uF capacitor, powered with 6V 2A power supply. Seems like it is not ...
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0answers
57 views

Automatic bird feeder with battery using servo

I am considering to create an simple automatic bird feeder with a servo motor and a plastic bottle, like this project, but without remote controller. The thing is that I would like to power it not ...
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1answer
107 views

Why do my servos break?

I'm messing around with some servos and one by one they stop working. I've got a Raspberry Pi to which I connected a pca9685 servo driver board which in turn connects to 3 of these cheap servos. I ...
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1answer
40 views

I want to use 4x MicroServo with 9V battery

I have 4 Tower Pro MicroServo 9g SG90 I want to power with a battery. This is the datasheet I found online. I have a small breadboard and some resistors laying around (220, 1k, 10k), and a 9V battery....
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1answer
57 views

Addition of limit switch for power supply stops circuit from working. Circuit works fine without the switch?

I am having an issue with a limit switch to turn on and off a circuit. I am using a L7805 5V regulator with a regular 9V battery as the power supply for my circuit. When I plug in the 9V battery ...
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0answers
20 views

AC servo motor driver problem (new, more precise) [duplicate]

I was not precise in last question. My AC servo motor driver "panasonic MSDA023A1A" which I use on CNC cutting machine is started to display alarm code "Err_18", which stands for regenerative ...
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2answers
53 views

Question about AC servo motor driver

Does anyone know what means when AC servo motor driver displays error code for "regenerative discharge", and stops working. What this mean in practical situation. This happens from 1 to 10 minuts ...
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1answer
98 views

Calculate torque from current induced in a single phase of a 3 phase AC Induction servo motor

I'm looking to measure the torque or slip angle on an AC induction (asynchronous) servo motor given the current induced in one of its phases. The servo and drive is yaskawa. Example data is shown ...
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1answer
1k views

Is this a correct way to route current away from breadboard?

I've recently grown interested in electronics and robotics, so I wanted to move my contraption using a servo motor. A 555 chip creates a PWM signal for servo for positioning, and I control the servo ...
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2answers
54 views

What are the 15 wires on my 700W BLDC servo motor for?

So I have this 48V 700W DC servo motor and I cannot find the datasheet from the supplier. Unlike most stepper and servo motors, this one has 15 wires coming out of it. It says that it has an encoder ...
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1answer
133 views

Arduino Circuit for High Power LED + Servos

I'm new to the Arduino game, but have experience with electronics in general. I am hoping to hook up two servo's and a high power (1W) LED up to an Arduino, to control them. Due to my inexperience, I ...
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1answer
57 views

Typically, what is the function between pulse width and angle in a servo motor?

I have a pair of Futaba S3001 servers that I am controlling with a Raspberry Pi, using the pigpio library. To control the angles of the servos, I set the pulse width according to the formula: ...
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1answer
100 views

Servo motors twitching , arduino Mega [closed]

I am working on a school project: a robotic arm controlled by an Arduino Mega board, 6 servo motors: https://hobbyking.com/en_us/power-hd-lw-20mg-servo.html?___store=en_us 1 PC power supply (450W), ...
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0answers
59 views

How drive two servos using BBC micro:bit using JavaScript?

I'm playing with a BBC:micro using EspruinoJS and I'd like to control a couple of Feetec FS90R continuous rotation mini servos(datasheet pdf link). I had no luck using ...
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2answers
60 views

Is there a demux IC that allows a default signal (not just digital 0) to go to the non enabled outputs?

I am trying to control multiple servos using a Demux and I want the selected output to have one pwm signal and then all of the non selected outputs to receive the same default pwm signal instead of a ...
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1answer
37 views

3 phase voltage problem when connecting to servo

I have 380V 3 phase with the following line to neutral voltages: L1: 238V, L2: 234V, L3: 224V. The system has a single phase servo driver that takes in L3 and N, however when hooked up L1, L2, and L3, ...
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1answer
79 views

Confusion on Servo and PWM (AVR) [duplicate]

For reference im using an AVR Atmega 328p, and the servo specs i'll be using says this: Pulse Cycle: 20 ms (I assume this means the "period") Pulse Width: 600-2400 µs So from my understanding, ...
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0answers
70 views

Difficulty with servo control using TI MSP430

I'm using an MSP430FR4133 chip to test out a servo (I haven't used or interfaced with servos before). I believe I've attached the servo wires to the correct pins, but when I run the program to turn it ...
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1answer
37 views

Two different power sources with same voltage and current producing different results

I'm working on a little 3D printed robot (Otto DIY) with an ESP8266 and four servos, and I need to feed it with batteries. As a first thought, I considered some 18650 cells I had lying around, with ...
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1answer
73 views

Raspberry Pi losing power

We are building a Raspberry Pi with 2 servo motors connected to one power supply. But whenever the servo motors are provided with a signal to power and then move, the raspberry pi's green light turns ...
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1answer
128 views

Servo wire connection layout [closed]

I'm trying to figure out with E-flite 7.6g Sub-Micro Digital Tail Servo JST my particular one has 1.0mm to male JR connector, so need to be connected with some switch, I have 2 other servos here, ...
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2answers
176 views

Is Axial Gap (pancake) motor better for servo drive applications?

I heard from someone that axial gap /pancake motors (lynch or etek) are better for servo control (speed and position) than standard radial flux DC motors. Both motors are brushed type. I don't ...
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4answers
1k views

Servo PWM: Why 20 ms period?

I'm working with ESC controllers which receive PWM signals that are very similar to those that control a standard Servo motor, i.e. a 50 Hz PWM signal (20 ms period) with duty cycle of 5-10% (1-2 ms ...
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1answer
34 views

switch 3 references voltage for my servo position

I have some positioning servo driver and servo with pot feedback. Now I try to build circuit to switch between 3 positions. For testing I just use 3 way switch and 3 pots as voltage reference, but in ...
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2answers
54 views

How to make servo rotate in a given range no matter how its placed in a chassis

I'm working on a humanoid robot project everything works but I have one issue. When I disassemble and then reassemble the joints, the servos will more than likely be placed in a different rotational ...
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0answers
103 views

Undervoltage/capacitor problems with Raspberry Pi

My question is about the correct way to add a capacitor to a circuit with a Raspberry Pi driving a servo. I have seen undervoltage events in the logs of my app when the servo runs so I added a 470uF/...
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1answer
83 views

Re-wiring experimental apparatus: Questions regarding proper ground, DC power supplies, and precision instrumentation

The apparatus consists of a large metal spherical chamber attached to a metal table. There are two electrical enclosures bolted to the table legs. The chamber is outfitted with multiple servomotors, ...
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1answer
209 views

Which kind of motor is best recommended for a curtain opener?

The general idea is to build a curtain opener, using some kind of motor connected to my arduino. Which will cause the pulling-functionality... So the following options are : 1. DC motor I feel like ...
0
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1answer
69 views

About the torque of mini servo motor

I'd like to automate button pressing on Nintendo DSi for a certain purpose. For this, I think I will use a raspberry pi and a mini servo motor SG-90. My question is, would the SG-90 would give ...
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1answer
98 views

Servo motor driver - 12V to 0~10v

I have a servo motor and it's driver I wired up everything and it's almost working. The driver generate a 12V signal and I control the motor with 0~10V analog command. I started from the point 5mA ...
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29 views

Best Hardware Approach to Play With multiple Buttons, Switches, steppers, Servos on Arduino

I would like to control the movements and positions of different actuators (steppers, DC motors, servos...), by either controlling some with potentiometers and / or getting them to move to preset ...
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1answer
201 views

How to reduce noise in this circuit?

I'm using a Raspberry Pi in a circuit I'm building that includes a few elements. Elements in the circuit: PWM driver to control 3 servos Mic board for recording Class D Amplifier that drives 2x3W ...
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1answer
178 views

Reduce 8.4 volts to 6 volts

I am developing robot for a project. For that i have to control 5 servo motors of different types. Here are my servos.. Power Pro MG995 (4.8 V to 7.2 V) Savox SW-0250MG (4.8 V to 6V) And my ...
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0answers
98 views

Servo sometimes freezes when used with another servo and MFRC522 RFID reader

I have looked, Googled and researched all over by now and I have not been able to find anyone experiencing a similar issue to mine, so I thought now would be the time to ask my own question on SE. ...