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5 votes
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How can I use an RC servo to rotate more than 360 deg and still maintain positional accuracy?

While originally creating this question I ended up finding an RC servo that can do this. HiTECH makes an RC servo (HS-785HB) that uses a muti-turn potentiometer rather than a standard rotary ...
markshancock's user avatar
5 votes

Biped Robot not getting on one foot

You got the second picture by physically manipulating the robot to get the center of mass above the rotated foot. What you need to do is to get the robot to shift its own center of mass in a similar ...
Chuck's user avatar
  • 16k
4 votes
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Biped Robot not getting on one foot

You might be able to use the the opposite foot to begin the rotation of your chassis, but it will be dependent on your chassis and foot geometry. Using your photos for reference, the left foot would ...
kaliatech's user avatar
  • 562
3 votes

Smart Home Model with Raspberry Pi

Though, there is not much information about your servos let's assume that they consume at least 1A each. This value will probably be higher given that you want to move doors and that requires torque. ...
Bence Kaulics's user avatar
3 votes
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2DOF arm with quick movement: Stepper, servo, or DC motor?

Servo mechanisms are not the "popular" RC-Servos (not-only). Servo is a closed-loop control, not only for motors. Even Steppers could or not be servo-motors. RC-servos are in major cases a DC brushed ...
Diego C Nascimento's user avatar
3 votes
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How to balance a humanoid robot on one feet?

Humanoid robots balance and motion planning are not trivial tasks. I believe you will learn a lot if you read about Zero Moment Point (ZMP). Basically, it is a specific point of contact between the ...
Robotawi's user avatar
  • 510
2 votes

Pulse Position Modulation as used in RC controls

Multiple channels are time sliced onto "one-wire". The real wire count is usually three. Typically there is a positive voltage wire (may not be there depending on whether both ends have their own ...
shooky's user avatar
  • 21
2 votes

Smart Home Model with Raspberry Pi

Raspberry Pis can be used for a huge range of things! And I like your idea! Although, you could use an Arduino Pro Micro board as that has everything you need and doesn't have unnecessary items like ...
SidS's user avatar
  • 248
2 votes

Biped State Space Implementation

The problem with most papers about LQR controller is, that they are describing only the half of whole problem. The key aspect of understanding LQR is that an additional "Finite State Machine" (FSM) is ...
Manuel Rodriguez's user avatar
2 votes

Mounting on servo horn

While all sorts of things get used in experiments, screws really intended to tap into plastic have larger more aggressive threads than those intended to go into a pre-tapped hole in a harder material ...
Chris Stratton's user avatar
2 votes

Why are some motor shafts stiff while others spin freely when not powered?

IMHO it depends on two factors: if there is gear on the servo (so to motor rotates fast, the result is slow precise motion with high force), then moving it manually even little means to rotate the ...
gilhad's user avatar
  • 453
2 votes
Accepted

Arduino RC Kids Ride-On car: wiring help needed

I suspect that you will need a more powerful motor controller. This one is a 10 amp controller, and I suspect that the motors will have a higher stall amperage than that. The RoboClaw 2x30 amp motor ...
NomadMaker's user avatar
2 votes

Servo motor power consumption issue

Firstly consider the servo torque limitations, if loading increase from specified limit the it start stalling and even can gear get fail and burn servo itself, possibly. And another concern is with ...
manan kalsariya's user avatar
2 votes
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Mounting gear on a servo

The attachment of something that's screwed in is not so much the screw, as it is the friction between the material around the screw (the "faying surfaces.") If you have good friction, and the load/...
Jon Watte's user avatar
  • 720
2 votes
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How should I power my servo motor with the Adafruit PCA9685 chip?

Have you tried to connect the PAD supplied with the HSB servo the fifth picture on this page? It is not necessary but in the case that your battery is fully loaded it an cause an overload if you don't ...
fcebron's user avatar
  • 66
2 votes

Servo motor vibration problem

In my experience, when a servo is shaking, that's how it tells you its power source (battery, etc) is inadequate. Especially if the servo hums or buzzes at around the command frequency (50 Hz in your ...
r-bryan's user avatar
  • 1,271
2 votes
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Can inferences about servo torque or applied force be made by measuring servo current drain?

Yes, measuring motor current will give you a rough indication of torque. However, there are some caveats. Any gear train that you have between the load and motor will decrease the usefulness of ...
Ben's user avatar
  • 5,865
1 vote

Pwm settings of a Sg90 servo motor

They use "cycle" to mean moved left then right. They moved it left then right 130,000 times. They did it at a rate of once per second. They moved it 70 degrees, without any load attached.
Chuck's user avatar
  • 16k
1 vote

Servo motor power consumption issue

From the TowerPro website from the MG995: Specification: Weight: 55 g Dimension: 40.7×19.7×42.9 mm Stall torque: 9.4 kg/cm (4.8v); 11 kg/cm (6 V) Operating speed: 0.20 sec/60° (4.8 V)...
Greenonline's user avatar
  • 1,568
1 vote
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Servo coupler size needed

RC Servos come with several different styles of exit shafts (often called splines due to the teeth that are cut into them). There are quite a few different styles. Tooth count (yes, 25T means 25 ...
markshancock's user avatar
1 vote
Accepted

How to create push and pull mechanism using Servo

Really simply - suppose you want to push-pull a switch. You fix the servo and the switch (or any other manipulateable object) to some base. Then set the servo to center position, put the plastic ...
gilhad's user avatar
  • 453
1 vote
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DC Servos moving randomly

Short answer: your power supply is insufficient. You would be better off using a common wall wart charger. If the servos are connected properly, they can move under three conditions: when they are ...
user3685427's user avatar
1 vote

Replace screws with motors!

You are best off using the servo's horn/hub (the plastic or metal disk or arm that you attach to the servo), and screwing the arm to the hub. You get buy some larger horns for fairly cheap, and that ...
user3685427's user avatar
1 vote

What happens when I connected my unpowered servo connector power wire to the powered arduino 5V pin?

Should be fine. If I remember correctly, the inputs to the ESC (more or less) control power mosfets. Putting input to a mosfet without power does not hurt it.
combo's user avatar
  • 450
1 vote

Biped State Space Implementation

The servomotor is already a closed-loop servomechanism that uses position feedback to control its motion and final position. Your servo is an integrated servomotor, and then it contains the following ...
cyberdyne's user avatar
  • 166
1 vote

Mounting on servo horn

With plastic holes especially on Servo Horns, the best solution is to use screws that are slightly bigger than the hole. Depending on the strength needed for this connection there are two methods ...
Indepth's user avatar
  • 70
1 vote

Adafruit PCA9685 servo driver connected to Beaglebone Green Wireless generating erratic movement when driving multiple servos

The movement you are seeing is what I would expect to see if your ground was rising becouse of current draw. Basically as you turn on more servos you will see there current draw will make the apparent ...
Mark Omo's user avatar
  • 1,919
1 vote

2DOF arm with quick movement: Stepper, servo, or DC motor?

any times when people say "servo motor" they are talking about the model airplane style square black plastic box. That is not what you want here. You would be looking at the industrial type servo. ...
user3150208's user avatar
1 vote

Is my servo fried?

Yes it's absolutely fried. Check the tech specs of your servo next time. Power requirement: 4.8V or 6V (from receiver) Power consumption: 6V 8mA (at idle)
ppdyy's user avatar
  • 11
1 vote

Controlling digital servos

I think people are getting their mS and uS mixed up! Generally it was always between 1mS and 2mS but to get the full range or extended range its said to be 0.8mS and 2.2mS (or 800uS to 2200uS) not 800 ...
Lee's user avatar
  • 11

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