Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [servo]

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

A kind of motor with automatic closed-loop feedback, usually for positioning. A standard hobby RC servo uses 1.0 ms to 2.0 ms pulses to set position; sending 1.5 ms pulses sets it to the center position.

Also see Servomechanism on Wikipedia.

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High accuracy servo

I'm looking for a two servos to power a pointing and tracking gimbal I'm building for some optics. I'm trying to find the highest accuracy servos I can buy in the standard servo package (or close to it). Does anyone have any recommendations? Most…
gallamine
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Move servo relative to current position (analog)

I have 3 sensors that feed into a couple of comparators that determine whether to move the servo or not. I used to do the moving with a microcontroller but I need to free some pins badly so I'm trying to accomplish this without software. The sensor…
Mel
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Servo does not stop in a stable position

I am currently playing with the HS-485HB servo, and I noticed that very frequently the servo will not stop in a "rest" position after it stops moving, even when external forces applied to it are tiny. Instead it stops in a roughly correct position…
Val Blant
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What is the OpenServo good for?

I found question OpenServo and I2C Syncronization here and I am curious what is OpenServo good for? According to OS Tutorial, you have to remove original board from your servo and install OS board. But what is the benefit? Why should I use OS…
vasco
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How can I determine if a servo motor is in the commanded position?

Once I have set PWM to move a servo to a particular angle, is there a way to detect that the servo has finished moving? I am concerned about situations where the servo is encountering extra resistance and is struggling to reach the desired angle.…
mushroom
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Determine rc servo motor resolution

I want to make a low thrust linear actuator with a cheap continuous rc servo motor and then control it with a microcontroller. The thing is, I want to find out what the minimum degrees is that a motor can move but it seems to be something that is…
Gerhard
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Are there double sided servos?

I see servos a lot on robots that seem to be connected from both ends. Are there servos where the shaft are on both ends of the servo?
Michael Rader
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Building Automated Cat Food Dispenser - Need Strong Servo for Worm Gear

I have a set up for an automated cat food dispenser where a servo turns a worm gear- which in turn drops the food. However, sometimes food gets stuck between the worm gear and the sides and the only way to turn the gear is by having enough force to…
joe
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How twitchy are larger digital servo motors?

In my servo-driven pen-plotter project, I have been experimenting with various different servos to discover more about their characteristics. In practice I have found that: analog micro servo motors work well and give good results, as you can see…
Daniele Procida
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Controlling servo

I just got a I2C PWM hardware module. I would like to use it to control some servos. I found here and there that servos uses a 50Hz PWM, if the pulse is 1ms it will go to 0° and 2ms will make it go to 180°. Is it the same for all servos? I also read…
sliders_alpha
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how significant is the effect of high loads on servo accuracy?

After reading up on some questions posted here regarding servos, I decided to go with the Dynamixel AX-12A which can be found here http://www.trossenrobotics.com/dynamixel-ax-12-robot-actuator.aspx. Will putting high loads on the servo…
rEgonicS
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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?
drew
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Will a servo hold its position without a signal?

A servo interprets a 1ms pulse as far left, a 1.5ms pulse as centre and a 2ms pulse as far right, usually. But what if there is no pulse? Will a servo hold its position if it is just commanded once and never commanded again for a few minutes?
Thomas O
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RC Servo motor power supply

In my RC servo motor datasheet the shall current is 600 mA. My Arduino cannot supply that much of current so, I decided to use an DC adapter to supply the power and arduino to control the Servo. My question is - Can I connect a DC adapter of 5 volts…
Kranthi kumar
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Prevent RC hobby servo from moving during power up

I have this unfinished PCB with 12 servo connectors and a buck converter circuit (the inductor has no 3D model yet.) I want to prevent these RC hobby servos from moving at all when I power up this board. In order to do so I need to apply the PWM…
bask185
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