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Author Topic: Continuous Rotation Servo Suggestions???  (Read 4505 times)

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Offline SmD13xTopic starter

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Continuous Rotation Servo Suggestions???
« on: March 27, 2008, 07:40:53 PM »
At the moment, I am using the Futaba S148 servo motor. The problem is that it does not have a fast rpm, maybe about 50-60 rpm. I'm new to all of this, so any help would be appreciated. Anyways, I am looking for a servo that can output enough rotations so that it can travel at least, lets say 30 feet in about 40 seconds or so. The wheels I am using have a diameter of around 2.5". I am looking for any suggestions of a servo I could use to have a robot travel 30 feet in about 40 seconds. Again, any help would be appreciated. I'm new, so if you could provide a link if possible that would be great. Thanks.

Offline airman00

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Re: Continuous Rotation Servo Suggestions???
« Reply #1 on: March 27, 2008, 08:17:05 PM »
why does it have to be a servo?
Check out the Roboduino, Arduino-compatible board!


Link: http://curiousinventor.com/kits/roboduino

www.Narobo.com

Offline SmD13xTopic starter

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Re: Continuous Rotation Servo Suggestions???
« Reply #2 on: March 27, 2008, 08:24:21 PM »
It doesn't have to be a servo, but from what I read it is the easiest to control. Again, I'm new to all of this, so I'm open to suggestions. From what I read, DC Motors need an H-Bridge to control them, as for servos can be controlled directly from the microprocessor. At the moment, I kind of need to get this project done fast, so until summer comes around I can't really learn to work with the H-Bridge, even though I'm sure its not that much harder. Also, I am using the Basic Stamp 2 microprocessor with a Board of Education Carrier board. If you have any certain motor or work arounds, let me know please. Thanks.

Offline airman00

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Re: Continuous Rotation Servo Suggestions???
« Reply #3 on: March 27, 2008, 08:31:31 PM »
I would say go with a motor driver and a geared motor. They are really easy to use

How much torque to you need the motors to have?


A motor driver kit
http://www.robotobjects.com/scripts/prodView.asp?idproduct=67

A regular motor driver chip
http://www.me.umn.edu/courses/me2011/robot/technotes/L293/L293.html

But first find your motors and then buy the drivers based on the motor's requirements
Check out the Roboduino, Arduino-compatible board!


Link: http://curiousinventor.com/kits/roboduino

www.Narobo.com

Offline SmD13xTopic starter

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Re: Continuous Rotation Servo Suggestions???
« Reply #4 on: March 27, 2008, 08:41:14 PM »
Well, I really wouldn't need much torque since the tire is 2.5" and the robot is only moving on flat, smooth surfaces. Anyways, would I be able to get that motor driver to work with the Basic Stamp 2 and Board of Education board? I know that company has their own H-Bridges, but those are a tad bit pricey.

Offline DC-Electronics

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Re: Continuous Rotation Servo Suggestions???
« Reply #5 on: March 28, 2008, 11:32:37 PM »
I have alot of motors that fit your needs I think. Take a look at my ebay store and see if there is anything there you like.
I can set you up with deal on a single motor of your choice, just let me know :)
« Last Edit: March 28, 2008, 11:33:44 PM by DC-Electronics »
Motors and Electronics at a great price :)
Had to close my ebay store due to ebay shenanigans :(

Offline SmD13xTopic starter

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Re: Continuous Rotation Servo Suggestions???
« Reply #6 on: March 29, 2008, 05:48:47 PM »
Thanks DC- Electronics. For now since I'm pressed for time, I decided to just use bigger wheels. During the summer though, I plan on getting a new project together, so when I need some stuff I'll keep you in mind.

Offline DC-Electronics

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Re: Continuous Rotation Servo Suggestions???
« Reply #7 on: March 31, 2008, 12:44:02 PM »
Hey not a problem :)

That post sort of reminded me of these little Nippo Denki motors I have. We custom ordered them without gearheads and all that... the go at about 30 000 RPM or something like that, Good times :)
Motors and Electronics at a great price :)
Had to close my ebay store due to ebay shenanigans :(

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