Questions tagged [vex]

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Question about Serial communication of Vex V5 brain

I'm currently developing serial communication for the Vex V5 brain. In the process, I came across the solution you provided on GitHub, which can be found here: https://github.com/ros-drivers/rosserial/...
Danilehi001's user avatar
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Is there any reason this VEX RobotC code should NOT engage the motor when the sonar sensor detects something?

I have the following code set up to run a simple test bed -- it's using VEX robotics Cortex 2.0, natural language PLTW. (Yes, I know it's old and now no longer supported, etc. etc. That isn't the ...
Jesse's user avatar
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1 answer
47 views

Should I be using the old clutches with VEX 393 motors?

I am posting here because the "official" Vex forums don't seem to support EDR anymore :-( but anyhow... I am teaching a class and we are using VEX parts to build a simple winch, the whole ...
Jesse's user avatar
  • 103
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0 answers
16 views

Strange behavior from VEX claw assembly using servo command

I noticed something odd when I tried to loop a claw so it would just open and close (eventually I want to have it just open when the ultrasonic sensor detects something in front of it and close a ...
Jesse's user avatar
  • 103
0 votes
1 answer
354 views

RobotC startMotor command useless?

I learned recently that robotc has a command called startMotor. it has two parameters, a motor and a speed, and it sets the motor to the speed. But the same thing can be accomplished in one line like ...
Isaac Bragg-Gardiner's user avatar
1 vote
0 answers
29 views

Measuring torque of Vex gear shaft - highest accuracy for lowest price [closed]

I am seeking to collect data for my IB Physics IA (internal assessment). My question seeks to establish the relationship between speed and torque by adjusting gear ratios. (I am aware that gear ratios ...
El8dN8's user avatar
  • 111
1 vote
1 answer
557 views

RobotC Code Malfuncion (VEX Robotics Clawbot)

I have a standard VEX Clawbot, which I've been trying to make go straight for some time. I've been following this guide: http://www.education.rec.ri.cmu.edu/products/cortex_video_trainer/lesson/3-...
nosn's user avatar
  • 123
1 vote
2 answers
673 views

Robot won't work properly, claw will only go one way and will only open or close once per cycle

We're students trying to make a clawbot for a Science Seminar class. However, for some reason, whenever we try to move the arm or the claw in a certain way, it will lock up and only move that ...
DeadlySprinklez's user avatar
2 votes
2 answers
2k views

Is there an online RobotC IDE?

I'm on a Linux chromebook, and am using a Vex robot, and am wondering if there is an online IDE for RobotC that will run my computer?
baranskistad's user avatar
0 votes
1 answer
369 views

VEX Cortex Motor Speeds up under load

I am trying to get my robot to drive straight and am having trouble. I find that when running the motors with no load they run fine. If I put a load on one motor it accelerates. The other performs ...
Commodore63's user avatar
1 vote
1 answer
399 views

How can I switch between Autonomous mode and usercontrol?

I want to switch from usercontrol to autonomous. When I have the program running for 120 seconds, how come it wont automatically switch in autonomous mode? Thanks! ...
Zach's user avatar
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1 answer
309 views

What is the RobotC type for motors?

I'm trying to create a function that allows me to more easily start a motor, but I'm running into a problem, I don't know the type to use for the motorName argument....
Ethan Bierlein's user avatar
1 vote
1 answer
58 views

How to distribute tension load on a three footed claw?

Good day! I am helping my little ones 6 and 7 to develop a robot that can pick up and stack cubes three high as well as gather blocks. They came up with the design that enables them to pick up ...
user9072's user avatar