Tag: servo

How Does PWM Work?

Question: What is PWM, and how does it work to control a motor or any other output? Answer: PWM stands for Pulse Width Modulation and allows you to easily control an output in a digital system. Some things that you can control with it might be the speed of a DC motor, or the brightness...

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Dobot to Dobot Handshake!

We did it! We made a dobot magician talk to another one and make it start. We even added a VEX switch as an input to start the first one. It is easy to do, but one word of caution: Never connect or disconnect any wires to the dobot while it is powered on; always power it down first. Damage may result! Ok,...

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The Lynxmotion AL5D V2: Putting it all together

So you have new Lynxmotion robots for your classroom, so now you have to build and wire them. I’ve put together 4 videos to help you assemble and wire them. This is not meant to replace the manual, but rather to supplement it. You can find the manual here: PLTW-AL5D-Guide-11.  Lots of new...

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Centering Servos

Question: How do you center the servos when you build your lynxmotion AL5D? Answer: Best way is to NOT turn the servos; like that’ll happen! There is a whole section in the new manual that can help you teach how servos work, so check the manual too! You can find it here: PLTW-AL5D-Guide-11. One...

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How do you use outputs on a Dobot Magician?

Question: How do you use outputs on a Dobot Magician to do something? Answer: How about a grinding operation? See below for the basics. A full blown tutorial will be coming soon! A Grinding Operation with the Dobot and a  Continuous Rotation Servo This robot is the smoothest, speediest, most accurate...

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Feetech Servo on the Lynxmotion AL5D Arm

Question: My new Lynxmotion AL5D robot arm from RobotShop came with a new servo called a Feetech. How come my arm works backwards now? Answer: Well…. because the servo may be installed backwards. I know, you looked at the picture on the directions, but the first one may be wrong. When they...

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Question: How do you fix a wrist rotate servo with stripped gears? It’s a pain in the butt as well as costly to replace. Answer: See the steps below for an inexpensive and simple solution! Note that te metal gears cost almost as much as the servo; it takes 5-10 minutes to change the gears,...

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Question:  How do I make sure my servos are centered before I build my robot? How can I test my servos once it is built? Answer: The I.L.A.R. (It Looks About Right) method works ok, but if you want to be precise, you need a servo driver. This video shows you how to use one to test your servos. One...

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Chris and Jim CIM
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