So I need a servo to move 90 degrees, and I read somewhere that you connect the reference wire to something and make the signal 1.5ms and it will make the servo rotate 90 degrees. I need to know what that ';something'; is.New to robotics. Controlling a servo?
You are new to servos so let me try to sort out some ideas for you. A servo is a system that can move a load at a predetermined rate...a rate servo. The sort of thing that drives a radar aerial at an airport...going round and round irrespective of the wind load on the aerial. Another type of servo is the positional servo which will move from one position to another at a predetermined rate...sort of thing that moves machinery from one position to another.
The servo itself can be hydraulic, electric, or pneumatic. The hydraulic system will need a source of high pressure oil as the ';power'; supply. The electric servo needs electricity as its power supply and the pneumatic servo needs a supply of compressed air as its power supply.
My knowledge is in electric servos and there are 3 distinct types depending on the motor technology. There is the stepping or stepper motor. This type of motor moves a precise angle for a pulse of energy applied to it. The angle of movement is fixed for each motor type and the list of angles is endless. Slight disavantage of the stepper motor is that it's torque output is fixed and if it is stalled then althought energy is being put in at the front end no movement will come out of the motor. The true servo motor can be either AC or DC. Why true servo motor because servos are the high performance motor...the GTI of the motor world. There have to deliver high performance all the time and must not fail so their carefull application is important.
A Rate servo need to have a speed sensor attached to the motor so that the control system can see how fast the motor is rotating. The Positional servo needs to have the speed sensor and a rotary position sensor so that the control system can determine both speed and positional control.
So getting back to your question, I would think that your wire should go to a stepper motor control drive and the stepper motor connected to the drive. By closing your signal the correct number of times you will get the motor to turn 90 degrees.
Good luck
Saturday, January 16, 2010
How can i control 4 r/c servos from pc?
i'm mechatronic student on technical highschool and i need this for my bomb robot project.How can i control 4 r/c servos from pc?
Hobby r/c servos use pulse width to control the position. The basic pulse is 1 ms. making this pulse larger or smaller moves the servo.How can i control 4 r/c servos from pc?
not a chance... go ask a U.S. marine. he'll help you determine the speed of a 308.....
RC servos are a staple of the hobby robotics industry. We use them all the time.
The quick answer is a servo control PCB. These are circuit boards made specifically to control servos and be controlled by a PC connection (USB or serial). I carry several in my store. The smallest ones usually control up to 16 servos.
I carry ones by Yost Engineering, Robotics Connection, and Hitec Robotics. There are others made by companies like Parallax, Phidgets or Blue Point Engineering.
I'll assume you want to keep this simple and continue to use your existing transmitters rather than starting from scratch by building your own transmitters -- that'd be a MUCH bigger project. The boards mentioned below would imply that you're willing to be ';tethered';, and your use of R/C in the question implies you wish to remain wireless.
Your typical PWM R/C servo transmitter system uses voltage changes (usually caused through the use of potentiometers/joysticks) to modulate the content of the RF signal that your transmitter to your receiver. You can accomplish the same thing by generating the voltage using D to A (Digital to Analog) circuits. You'll need to meter the circuit to determine typical voltages generated by the pots and generate that same range of voltages externally and feed them into the circuit in place of the voltages created by the pots.
Many companies sell A to D and D to A boards for PCs. Some operate over USB, and others plug directly into the computer's backplane.
You then use those voltages to replace the potentiometers on your transmitters.
You then write simple software to control the output of these D to A boards which in turn control your R/C transmitters.
Some companies you might want to include in your investigation include National Instruments (www.ni.com), and IOTech (www.iotech.com). Measurement Computing (www.measurementcomputing.com) has some reasonably inexpensive USB models that are well worth a look -- see 4 channel unit at the following link:
http://www.measurementcomputing.com/cbic鈥?/a>
Just remember, you need something with qty 4 D to A channels if possible to avoid having to buy multiple units.
Hobby r/c servos use pulse width to control the position. The basic pulse is 1 ms. making this pulse larger or smaller moves the servo.How can i control 4 r/c servos from pc?
not a chance... go ask a U.S. marine. he'll help you determine the speed of a 308.....
RC servos are a staple of the hobby robotics industry. We use them all the time.
The quick answer is a servo control PCB. These are circuit boards made specifically to control servos and be controlled by a PC connection (USB or serial). I carry several in my store. The smallest ones usually control up to 16 servos.
I carry ones by Yost Engineering, Robotics Connection, and Hitec Robotics. There are others made by companies like Parallax, Phidgets or Blue Point Engineering.
I'll assume you want to keep this simple and continue to use your existing transmitters rather than starting from scratch by building your own transmitters -- that'd be a MUCH bigger project. The boards mentioned below would imply that you're willing to be ';tethered';, and your use of R/C in the question implies you wish to remain wireless.
Your typical PWM R/C servo transmitter system uses voltage changes (usually caused through the use of potentiometers/joysticks) to modulate the content of the RF signal that your transmitter to your receiver. You can accomplish the same thing by generating the voltage using D to A (Digital to Analog) circuits. You'll need to meter the circuit to determine typical voltages generated by the pots and generate that same range of voltages externally and feed them into the circuit in place of the voltages created by the pots.
Many companies sell A to D and D to A boards for PCs. Some operate over USB, and others plug directly into the computer's backplane.
You then use those voltages to replace the potentiometers on your transmitters.
You then write simple software to control the output of these D to A boards which in turn control your R/C transmitters.
Some companies you might want to include in your investigation include National Instruments (www.ni.com), and IOTech (www.iotech.com). Measurement Computing (www.measurementcomputing.com) has some reasonably inexpensive USB models that are well worth a look -- see 4 channel unit at the following link:
http://www.measurementcomputing.com/cbic鈥?/a>
Just remember, you need something with qty 4 D to A channels if possible to avoid having to buy multiple units.
Where would i get servo motors and remote controls?
i've been facing problems in buying good and inexpensive servo motors and also i cant find 3 channel remote control which i need urgently can anyone tell mewhere i would get those i live in indiaWhere would i get servo motors and remote controls?
ebay
micromotor...General Electric, Fanuc
what size? what speed?...
D
ebay
micromotor...General Electric, Fanuc
what size? what speed?...
D
How to tell when radio control servos are bad?
Servos pretty much work or not. They either will move when you move the stick or they won't. Sometimes they can ';glitch,'; they will twitch a little on their own- this can be caused by interference or a dirty pot inside. Swap them to another servo channel on your receiver to see if the problem is in the servo itself or in the receiver.How to tell when radio control servos are bad?
when they don't move any more in response to your powerful radio commands, sky captainHow to tell when radio control servos are bad?
lots of static
when they don't move any more in response to your powerful radio commands, sky captainHow to tell when radio control servos are bad?
lots of static
How to build robotic servo with standard Radio Controlled (R/C) interface?
Does anyone know where I can find instructions on how to build high torque robotic servo. I have purchased the most powerful R/C servos available and need more torque and travel. So I'm looking at building my own from scratch. I basically need it to function like a regular R/C servo but with much more torque and travel and it needs to plug into a standard R/C receiver. Thanks, Kevin.How to build robotic servo with standard Radio Controlled (R/C) interface?
There is a magazine I found at the Barnes %26amp; Nobel bookstore about making robots. It's called SERVO. It's a nice and informative magazine. My son totally enjoyed it.
There is a magazine I found at the Barnes %26amp; Nobel bookstore about making robots. It's called SERVO. It's a nice and informative magazine. My son totally enjoyed it.
What is the difference between servo controlled & static controlled?
I am guessing but servo control uses another method (hydraulics, electrics or similar) to apply a force on an object. Static control means that the object is controlled directly by rods, levers or similar devices.
Hope this helpsWhat is the difference between servo controlled %26amp; static controlled?
From the terminology, I assume that you are asking the difference between servo controlled and static controlled voltage stabilizer.
A servo controlled device uses the following:
1. Error sensor to sense the deviation between desired value and actual value
2. Servo amplifier to provide the required gain and time for response
3. Servo motor coupled to an actuator to correct the error
In a static controlled environment, instead of servo motor, there are no moving parts. It uses switching technology (like transistors, thyristors, solid state relays etc) to correct the error.cosmetics online
Hope this helpsWhat is the difference between servo controlled %26amp; static controlled?
From the terminology, I assume that you are asking the difference between servo controlled and static controlled voltage stabilizer.
A servo controlled device uses the following:
1. Error sensor to sense the deviation between desired value and actual value
2. Servo amplifier to provide the required gain and time for response
3. Servo motor coupled to an actuator to correct the error
In a static controlled environment, instead of servo motor, there are no moving parts. It uses switching technology (like transistors, thyristors, solid state relays etc) to correct the error.
About speed control and dc servo motor.?
i want to know about speed control and dc servo motor.If it is possible i want a lab report about it.It should not include about the step response or ac servo motor.About speed control and dc servo motor.?
http://www.animatics.com
http://www.animatics.com
Subscribe to:
Posts (Atom)