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Questions tagged [servo]

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

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2answers
44 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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0answers
12 views

Servo motor rotates back to 0 after reaching destination [migrated]

I am using a XMG-996R servo motor. It is controlled by and Arduino Uno board. The problem is when I tell it to go to a certain angle, it will rotate to the desired position but then return to 0. The ...
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1answer
69 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
34 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
60 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
47 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
53 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
36 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
57 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
33 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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0answers
35 views

Motor or a Servo

I'm looking to build a motorized throttle quadrant replica of a Boeing 737 that would connect to Flight Sim. I do have a quite good idea of what I am trying to do and how to do it but I am fairly new ...
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1answer
36 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 ...
2
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1answer
68 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
119 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
158 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
429 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
31 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
51 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
80 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/...
4
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1answer
75 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
123 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 ...
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1answer
56 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
53 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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0answers
28 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
98 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
127 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
70 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. ...
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1answer
108 views

How to achieve positional servo control with an Atmega328P?

I am trying to drive my SG90 servo using the timers on the Atmega329P using phase correct PWM. I have set up my motor well enough that it rotates, but I cannot get it to stop - the servo motor just ...
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2answers
308 views

Can I manually turn a servo by hand and then record the rotation for a response with arduino?

Looking to try and use a servo to increase resistance as it is turned.
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0answers
125 views

What battery to use for a MG996R High Torque Servo?

This servo’s operating voltage is 4.8v - 7.2v. The running current is 6v @ 500mA - 900mA, and the stall current is 2.5A @ 6v. Now, I plan on using this servo 24/7 on my door lock ( this might be a ...
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3answers
89 views

Is there a type of servo that can be de-energized and moved manually while giving input back on its position? [closed]

Is there a type of servo that can be de-energized and moved manually while giving input back on its position? So say it's at 0 degrees, I turn it to 5 degrees and I get input back from it indicating ...
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2answers
88 views

Controlling multiple servos and servo driver through Blynk

I'm working on a project to control multiple servos using a servo driver, through sliders on Blynk. I'm using: ESP8266 WeMos D1R2 microcontroller (wifi connected) Adafruit PCA9685 Servo Driver Blynk ...
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2answers
80 views

Inside a library of common functions (Instruction Set ----> High Level Program) is there information of how many clock cycles they use?

I am a Mathematical Person. So thinking from that perspective. To make my question slightly more concrete. I was thinking of controlling a hobby servo through a Uart serial data stream. I am ...
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1answer
227 views

Servo motor rotation angle accuracy [closed]

Let's say I want the motor rotate to 21.73 degree, will servo motor rotate to the desired degree accordingly? Or maybe the motor will rotate to 22 degree?
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1answer
50 views

Measure the load on a servo very precisely?

I am trying to make a servo turn a dial. At certain points in the revolution, the dial will "stick" on certain points, where there is more resistance. I would like the servo to be able to very ...
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2answers
86 views

Reading Servo Motor Status with PLC

I have a Panasonic A6 servo driver paired with Velocio Ace PLC. I am trying to read servo motor status. I followed the wiring diagram from the servo manual and connected the PLC digital input to Servo'...
0
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0answers
280 views

Servo motor interfacing with 8051 by assembly language

I know the principles of servo motor and programming it, I already done it with FPGA and adjusted the PWM like I wanted. But with 8051 assembly, I can't do the PWM or generate the 20 ms for the motors....
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2answers
62 views

Max current per battery chemistry

From the background and responses to my other question I gather that 5 NiMH batteries can provide more than 4 A current, and that Alkaline or Manganese batteries cannot. So, what about LiPO, LiFePO4, ...
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0answers
40 views

Pressure Tolerant Rotary Potentiometer

I am looking to use a small potentiometer for servo position feedback inside an oil filled pressurized enclosure. I am unsure if the given potentiometer will operate in these conditions. I see various ...
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0answers
90 views

Servo motor misbehaves e.g. jumps and glitches [duplicate]

I am controlling a digital metal geared servo motor (MKS-HBL880) using TI's C2000 LaunchPadXL TMS320F28379D microcontroller. The servo is powered with a 7.4V 2S-Lipo battery. The microcontroller and ...
0
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1answer
213 views

Voltage drops on circuit powering a servo motor. Is there a solution?

I have a 5 Volts, 4 Amps power supply that gives power to a Raspberry Pi Zero W (120-230mA at 5.19V), and a servo motor with these specifications: ...
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1answer
95 views

Servo motor vs stepper motor

This question is to get general idea of servo and stepper motor. Assume same power rating motor and same voltage rating two motors. Which are servo motor and stepper motor. Same gear ratio. what is ...
0
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1answer
59 views

Servo Motor Control

I tried to control servo motor by using servo library in Arduino and it is working fine. But when I use separate power supply and function generator, it is not working. It is go to end which means 180 ...
0
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1answer
74 views

Servo power switch circuit

I've got a servo setup with an Arduino, and I'm looking for a good way to switch the power to the servo on and off. I've come up with the below circuit: My intention behind the circuit is to set the ...
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0answers
61 views

Control servo with 4 wires with Blynk

im a beginner in coding and I was wondering if I could control an old servo using the Blynk app. I want to control the direction, so it can unroll the screen up and down. We opened the servo to look ...
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3answers
740 views

What happens when I use a bigger capacitor?

I'm using a Adafruit Servo Driver (PCA9685) and I have to solder a capacitor depending of the number of servos. We have a spot on the PCB for soldering in an electrolytic capacitor. Based on your ...
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1answer
92 views

Servo Vs Stepper for a high accuracy project

Im trying to build a weird idea for academic purpose. Trying to control a real car using joystick. So for the steering purpose and accelerator pedal, without modifying any internal mechanics, what Im ...
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1answer
53 views

How to go about determing the System Type of my setup?

I have a small project where I am PID tuning two servo motors. Something very similar to this: I am interested in finding the system type of the above setup, which includes the PID loop I have tuned. ...
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1answer
121 views

A question about servo motor direction control

Before asking the question I want to mention the basic two premises I know: As far as I understand for direction control, H-bridge inverter is used only for a certain type of DC motor not for an AC ...
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1answer
201 views

Simple project. Two servos are burnt. What's wrong?

It is a simple project - a focus system for a taken lens and anamorphic adaptor. I have three pots. The first one I use as a manipulator. The second is used to get the position of the continuous ...