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

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1answer
20 views

A6627SJP-T datasheet

i have this A6627 component in the printer. Looks like a current control circuit. Does anybody have a datasheet or at least knows the serial protocol this device uses? Thanks!!!
0
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1answer
54 views

Can a capacitor provide enough current to be used as a fail safe for a servo?

Here's my situation. I'm planning to use a servo (like the ones used in RC models) to rotate a chunk of lead between two positions: 0º and 180º. Since I'll probably be powering the servo from a wall ...
0
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1answer
70 views

PIC18F4520 failed using internal oscillator at 1MHz , please help thank you

I am wishing to use the internal oscillator of the pic18f4520 at a frequency of 1Mhz , what i wish to achieve in the end is to use to control a servo. ...
0
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1answer
21 views

Servo converting to continuous

i have 2 servos 7.2 volts,the rated current is 0.35 ampere and 3.5 ampere stall.i want to convert it to be continuous,so i will remove the potentiometer and put two resistors equal in value instead of ...
0
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2answers
31 views

Controlling servo torque

TL;DR : Can I control a servo's torque by PWM'ing a PWM ? I'm thinking about buying a dynamixel AX18 and I would like to be control it's output torque. If I modulate the input command, I expect the ...
0
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0answers
49 views

How to control 2 servos at same time in sync? [migrated]

For overcoming torque issues, I have attached 2 identical servos on a certain part of my robot arm and because I saw someone do the same. Now, while writing code I realize: ...
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1answer
65 views

How many AA batteries for 10 servos and how long will they last? [closed]

I'm using 10 servos. I know I can't power them with my arduino, so I want to use AA batteries to power them. How many AA batteries do I need then and how long will they last?
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2answers
46 views

Is it possible to decrease the speed of a standard servo motor?

I have TowerPro SG-5010 and its speed is 0.17 sec/60° at 4.8V and 0.14 sec/60° at 6V. Just to be sure, is it possible to further decrease the rotation speed?
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2answers
34 views

Logic level conversion for servos

I'm trying to spy on the state of servo communications with a RC receiver and optionally change the output. Unfortunately my controller is 3.3v while the servo logic is ~5v. I'm trying to figure out ...
0
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0answers
13 views

Does the ability to program a servo imply that the Lock Bits were not set on a Atmega48?

I'm wondering is how this servo programming business works: The servo (HS7980) has an Atmega48 chip and uses a proprietary protocol for programming so it seems pretty likely they lock it to prevent ...
0
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1answer
39 views

Delay vs Quick Fuses for servos

I have read that delay fuses are ideal for electric elements that require an additional start-up current like electric motors. I am using several servos to drive a pretty heavy mechanical structure. ...
0
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2answers
73 views

Checking my understanding of how hobby servo motors operate?

Can someone tell me if my understanding is correct please. The control signal to a hobby servo motor that is connected to an arduino operates by : In every 1 s there are fifty windows each of length ...
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1answer
31 views

would this be safe to control servo with usb

i've been asking around and people has been telling me that the max current a usb can supply is 100 ma then 200 ma then 500ma then the http://en.wikipedia.org/wiki/USB says 0.5–0.9 A (general) 5 A ...
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1answer
43 views

Servo Motion Direction

I am trying to set up a servo controller that will automatically make the servo switch direction when it nears the end of its travel range. I designed a solution that uses a quad comparator and a ...
0
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1answer
65 views

High-current motor on isolated circuit causing servos to move

I have a robot with several servos controlled by an arduino. Also attached is an electric airsoft gun, which draws considerable current. The gun is on an independent circuit with a separate battery ...
4
votes
5answers
79 views

Staggering PWM waveforms for servos to minimize current spikes

If I'm controlling multiple hobby PWM servo motors, is there an advantage to staggering the pulses sent to each servo? By which I mean, each servo needs to see a pulse of width ~1ms every 20ms. Let's ...
1
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2answers
117 views

GPS in combination with servo on Arduino

Me and my friends are building a boat which needs to steer towards certain coordinates. We have a GPS and a compass on board. We have written code which calculates the direction that the boat has to ...
0
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1answer
48 views

motor movement as in and output

I am looking for a way to counteract an active servo or stepper motor. In more detail: I want to translate the movement of a controllable motor to a linear rod movement. This rod goes up and down ...
0
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2answers
41 views

Rudder and Main Sail control

I'm creating an autonomous sailing boat and just looking into how to control the sail and rudder. The electronics will be low powered with the main brain being an Arduino. My problem is thinking of ...
0
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0answers
82 views

Control tons of servo motors with one pin on Arduino?

I'm controlling 15 servo motors with Arduino Uno. The 15 servo motors will be doing the same thing all the time, so I'm trying to using one pin for all of them (But I'm using external power source for ...
1
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1answer
48 views

Can you use a the vout of a regulator as the cathode and your full voltage as anode?

I have a servo from an rc car with 6 wires, it turns out the servo controller is built into the RC Car with a bad board. I have a motor, a gear box and a 10k pot attached to it. I'm trying to build a ...
0
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0answers
33 views

Servo Not Moving to Commanded Position

The following servo: https://www.sparkfun.com/products/11884 (4.8V - 6V) is being used in a robot that I've got. While I was running off ofthe 5V output from my arduino, it was fine. The current draw ...
0
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3answers
126 views

Anything Wrong with my Light box Design?

I am creating a custom box that will contain 3 * 400 watt metal halide bulbs (1200 watt total). The box will remain closed for 60 minutes, open for the next 60 minutes, then closed, then open and so ...
1
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1answer
83 views

AVR Attiy45 PWM Servo motor control in Assembly

I'm trying to contol a servo motor with attiny45 writing the code in assembler. I figured out how to set the timer in pwm mode and how to choose a needed prescaler. And with different OCR0A values i'm ...
1
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2answers
181 views

How to prevent servo startup jitter

I have a small Arduino Uno powered robot I'm entering in a competition, and it uses some small servos to position sensors and other actuators. According to the rules, it can't move until a ...
0
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1answer
91 views

Need a very low power, low force motor/actuator

What are some alternative types of motors/actuators that can be used instead of servos? I need some way of inducing a slight bit of motion/movement but with very little force and power consumption. ...
0
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0answers
92 views

Arduino Uno/Multiple Servos - Single Power Source

With full disclosure, I am a noob at this, so please be gentle as I have researched this across multiple boards and am frankly confused by the answers: Short Version: I have built an Iron Man Suit ...
1
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1answer
60 views

AVR's and DC Motors\Servos

I've been browsing around looking for some information on motors\servos and AVR's (my MCU of choice). Motors\servos are in my gray area, meaning I'm still not too into them, but I could do something ...
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1answer
41 views

position control mode of industrial servo motor

I have searched alot about industrial servo motors and their application but the problem is about the pulse command used in position control mode, can I use a 555 timer for the generation of such ...
0
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1answer
46 views

Most energy efficient and very small volume way to produce motion

I'm looking to make motion (may be 100g) using very small, and very energy efficient component, and prefereably very cheap, i've found some nano servomotors which satisfy my criteria, but i wonder if ...
0
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1answer
40 views

Can a linear motor output multiple and precise linear forces?

I am trying to identify a motor-driven system that can produce a constant linear force in one direction. The context for this is an injection device that compresses the plunger of a syringe ...
1
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1answer
451 views

How to determine the rotation direction, rotation angle and rotation speed of a stepper motor and a servo motor

During one of my lab session I faced this problem and couldn't find any good answer. As far as I know for a stepper, Reversing the direction of current will change the direction of rotation. ...
0
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3answers
49 views

Is it possible to run 2 motors independently with USB?

Is it possible to run two motors independently in both directions with usb using no microcontroller but just some discrete components? I'm trying to create the cheapest possible robot that can just ...
0
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0answers
59 views

Custom servo motor for low power applications?

I'm trying to design a low-power device that is essentially just a heavy duty servo motor that is triggered on and off by an internet connected chip. This device needs to be very low power, running ...
0
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0answers
81 views

arduino brushless motor angular speed

I am using brushless DC motors for my project. I am controlling the motors via arduino through ESCs. I wanted to retrieve the rad/s speed of each motor. I use the arduino's Servo.h library to send ...
0
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0answers
42 views

Digital to Analog - Bluetooth from device screen to output old-fashioned Typewriter

I'm working on a hobby project converting an old-fashioned typewriter into an instantaneous printer(!) - basically, by allowing for a digital/virtual keyboard to be able to output to the typewriter ...
2
votes
2answers
142 views

What can be the reason for a voltage drop across daisy chained RS485 servo motors?

We are using a set of RS485 servo motors(Robotis EX-106) for our humanoid robot. This motor has a 4 pin connections namely Ground,VCC, D+ and D-. The Ground and Vcc terminals are from the power ...
0
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1answer
163 views

Is a 600+Hz R/C Servo/ESC refresh rate possible?

In the R/C multirotor scene, the trend at the moment is to have very high refresh rates on your ESCs (speed controllers). My understanding of how servos/ESCs are driven is a 1-2ms pulse is sent to ...
0
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1answer
261 views

RaspberryPi + TowardPro MG996R DIGI HI TORQUE +PWM

I am trying to control this servo from a RaspberryPi. https://skippy.org.uk/wp-content/uploads/MG996R_Tower-Pro.pdf I sort of figured out that a servo needs a specific pulse for a specific degree. ...
2
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4answers
277 views

How much weigh can a torque carry?

I have a servo motor with a torque of 10kgcm. My question is how much weight can it carry? I really don't understand "kgcm." Is there a way to calculate how much weight can a motor carry?
0
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1answer
278 views

Using a Arduino Pro Mini to power more than 2 servos

I don't know very much about Arduino, but from some basic research I have read that the Arduino Pro Mini can only support two servo motors. I am trying to create a set of reaction wheels using hard ...
0
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1answer
268 views

How do I detect servo stall with an Arduino?

I am controlling a standard 5-volt servo with an Arduino with PWM. My objective is to rotate the servo until it physically gets stalled (feels resistance) and then stop. Then I want the Arduino to ...
0
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2answers
109 views

Serial Servo Control using PIC

I am trying to make a serial servo controller using pic18f4550 microcontroller. following if the complete code that i've tried.. please note that i'm currently sending 8bit hex to control only one ...
0
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2answers
394 views

Control multiple servos using pic18f microcontroller?

I want multiple servos to be controlled through pic18f4550 microcontroller. I know for a single servo I can use the following code. ...
0
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2answers
199 views

Angular Acceleration: Understanding the differences between Gyroscopes and Accelerometers

I apologize for what is likely an ignorant question, but I am fairly new to electronics and have little confidence. I am working on a personal project where I am using a servo motor to move a rod back ...
0
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0answers
42 views

Adapt servo for torque input

I want cheap motors to reach a reference trajectory (positions, velocities, accelerations) and use torque as input for the system. This is intended for rapid movement reproduction. I would like to ...
0
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2answers
191 views

Why does my 24 volt DC servo motor run at 5 volt DC and not at 24 volt DC?

Why does my 24 volt DC servo motor move with 5 volt DC drawing 5 amps, but does not move with 24 volt DC? The power supply is 24 volt DC up to 10 amps. Datasheet are available for the DS4S servo ...
0
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1answer
166 views

Connecting multiple servos for a robotic arm

i am computer programmer and its really been long since i have done electronics. I need help on connecting my servos to an arduino to power my robotic arm. This is the robotic arm that i am trying to ...
0
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2answers
124 views

What factors can determine the constant coefficient when calculating torque?

In this servo motor's datasheet, both motor have the same torque of 0.32 Nm, have the same power of 100w, but have different rated currents and voltages. It seems that the "torque" relates to the ...
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0answers
121 views

24VDC servo motor does not start

I have a 24VDC servo motor (servo motor specs) I want to use to move a small linear stage. The servo output is 20,6W. It requires 5000steps per revolution. I have the motor connected to a servo ...