Vex Fan

RE: How to get RobotC

Author: vnguyen
Posted: Tue Mar 02, 2010 8:30 am (GMT -5)
Topic Replies: 2

ROBOTC just released a 2.0.1 version of ROBOTC. As always, you can download it at www.robotc.net.

Direct Link to the page:
http://www.robotc.net/download/vex/

RE: how to determine the power going to a motor

Author: MarkO
Subject: Re: how to determine the power going to a motor
Posted: Sun Feb 28, 2010 9:50 pm (GMT -5)
Topic Replies: 1

vox wrote:

Is there a function like

Code:

getPWM()

or something that can be used to detect the value that would be going into

Code:

setPWM()

at the moment the function is called.

I'm looking for something that would be able to detect both input from the remote as well as something programmed in.[/code]

As far as knowing how much power is being used by the Motor, that is not possible..

But as far as knowing the Value, just assign it to a Varaible, and then use the Variable to set the PWM value..

Code:

#include "UserAPI.h"

unsigned char Motor_Left;
unsigned char Motor_Right;

void main ( void )
{
//Assuming Square Bot, Tank Drive
while ( 1 ) // Always TRUE
{
Motor_Left = GetRxInput ( 1 , 3 ) ; // Read Controller, assign to Left Motor
Motor_Right = GetRxInput ( 1 , 2 ) ; // Read Controller, assign to Right Motor
SetMotor ( 3 , Motor_Left ) ;
SetMotor ( 2 , Motor_Right ) ;
PrintToScreen ( "Left Value ----->%d\n" , (int)Motor_Left ) ;
PrintToScreen ( "Right Value --->%d\n" , (int)Motor_Right ) ;
}
}

_________________
MarkO

FRC Team 957 "2007-2009 Professional Mentor"

http://vex.markdoverholser.com/notice.html

http://vex.markdoverholser.com/
http://tech.markdoverholser.com/

setting up pneumatics for the first time

Author: vox
Subject: setting up pneumatics for the first time
Posted: Sun Feb 21, 2010 8:53 pm (GMT -5)
Topic Replies: 0

Is there a guide anywhere that shows exactly how to connect a vex pneumatics system that also shows code which corresponds with it?

how to determine the power going to a motor

Author: vox
Subject: how to determine the power going to a motor
Posted: Sun Feb 21, 2010 8:51 pm (GMT -5)
Topic Replies: 1

Is there a function like

Code:

getPWM()

or something that can be used to detect the value that would be going into

Code:

setPWM()

at the moment the function is called.

I'm looking for something that would be able to detect both input from the remote as well as something programmed in.[/code]

RE: Another Newby

Author: HoldYourHover
Posted: Wed Feb 17, 2010 2:23 pm (GMT -5)
Topic Replies: 3

Thanks for the answer. I have a new problem. I can't get my limit switch or any sensor to stop motion. I have tryed every combination I can find. If I have a motor on 6 and a sensor on A/D 5 or 6, It will not stop the servo. I tryed CW and CCW. I tryed motor port 2 and 3, and every A/D port 1-8. I downloaded the default code. All motors run fine. Just can't limit motion. Ideas?

RE: Another Newby

Author: HoldYourHover
Posted: Thu Feb 11, 2010 6:28 am (GMT -5)
Topic Replies: 3

I don't know anything about programing but want to learn. I enjoyed the step by step stuff in the book but want to learn more. Is there a list of all the drag and drop items and how they are to be used?

RE: Another Newby

Author: MarkO
Subject: Re: Another Newby
Posted: Wed Feb 10, 2010 5:25 pm (GMT -5)
Topic Replies: 3

HoldYourHover wrote:

If you are wondering, Hold Your Hover is an RC helicopter thing. I've played with a BoeBot but I enjoy wrenching on VEX more. I have some general questions if someone would be so kind to help me.

Sure....

Quote:

The "Claw" is a VEXplorer thing. Does it work with VEX? Should I do something different?

Yes.. ALL Vex Hardware is compatible between both sets..

The Electronics are more specific.. You can use the Vexplorer motors with the original Vex, but you need the Motor Adapters.

Quote:

Why buy servos? Motors can do what they do and also be motors. Right?

Servos are not continuous rotation, since they have built in limits, they can quite accurately return to the same position, by sending the same value to the Servo, but you can achieve most all of your motion with just the motors.

Quote:

The rivets suck, or is it just me? Any reason you can't use screws instead?

Rivets can be quick to insert and remove.. Use the Right Tool for the Job...

Quote:

Any better tutorial on easyC?

Better than What??
_________________
MarkO

FRC Team 957 "2007-2009 Professional Mentor"

http://vex.markdoverholser.com/notice.html

http://vex.markdoverholser.com/
http://tech.markdoverholser.com/

R2 Work Again

Author: ctx32
Subject: R2 Work Again
Posted: Mon Feb 08, 2010 7:15 pm (GMT -5)
Topic Replies: 0

Hi guys,
I've been working on R2 to get him to the point where I could use the Vex and the time has finally arrived.
As usual I need some help again. I have most of the code complete,
But I ran into some areas that I don't know what to do.
Here's the code readout.
If anyone can help I would appreciate it.
Calvin

#include "Main.h"

void main ( void )
{
int Limit1 = 0;
int Limit2 = 0;
int Bumper1 = 0;
int Bumper2 = 0;
int Bumper3 = 0;

// Trying to run a small Vex lift up/down with the help of a 12ch. remote
// Limit switches are staying active !!!!!!
while ( 1 == 1 )
{
Bumper1 = GetDigitalInput ( 7 ) ; // 12 Channel Remote with Relays
if ( Bumper1 == 0 ) // If 1ch relay is closed
{
Wait ( 2000 ) ; // After pressing button wait 2 seconds
SetMotor ( 1 , 255 ) ; // Run motor up
}
else
{
Limit1 = GetDigitalInput ( 5 ) ; // Top limit switch to stop motor
if ( Limit1 == 0 ) // If limit switch is closed
{
SetMotor ( 1 , 127 ) ; // Stop motor
Wait ( 4000 ) ; // Wait 4 seconds then turn head
SetServo ( 2 , 0 ) ; // Turn to the right position
Wait ( 4000 ) ; // Wait 4 seconds in this position
SetServo ( 2 , 255 ) ; // Turn to the left position
Wait ( 4000 ) ; // Wait 4 seconds
SetServo ( 2 , 127 ) ; // Turn back straight
Wait ( 2000 ) ; // Wait 2 seconds
SetServo ( 2 , 0 ) ; // Turn to the right last time
Wait ( 2000 ) ; // Wait 2 seconds
SetServo ( 2 , 127 ) ; // Turn back straight
}
// Lift is up at this point and the top switch is still pressed
// Head continues to turn side to side
}
// Lift still up and will not return due to top limit switch !!!!!!!
// Need a override for the limit switches !!!!!!
Bumper2 = GetDigitalInput ( 8 ) ; // Same 12ch. Remote with Relays
if ( Bumper2 == 0 ) // If 2ch. Relay is closed
{
Wait ( 2000 ) ; // After pressing button wait 2 seconds
SetMotor ( 1 , 0 ) ; // Run Motor Down
}
else
{
Limit2 = GetDigitalInput ( 6 ) ; // Bottom limit switch to stop motor
if ( Limit2 == 0 ) // If limit switch is closed
{
SetMotor ( 1 , 127 ) ; // Stop motor
}
}
Bumper3 = GetDigitalInput ( 9 ) ; // Same 12ch. Remote with Relays
if ( Bumper3 == 0 ) // If 3ch. Relay is closed
{
SetMotor ( 3 , 255 ) ; // Rotation Motor
}
else
{
SetMotor ( 3 , 127 ) ;
}
}
}

Another Newby

Author: HoldYourHover
Subject: Another Newby
Posted: Mon Feb 08, 2010 7:50 am (GMT -5)
Topic Replies: 3

If you are wondering, Hold Your Hover is an RC helicopter thing. I've played with a BoeBot but I enjoy wrenching on VEX more. I have some general questions if someone would be so kind to help me.

The "Claw" is a VEXplorer thing. Does it work with VEX? Should I do something different?

Why buy servos? Motors can do what they do and also be motors. Right?

The rivets suck, or is it just me? Any reason you can't use screws instead?

Any better tutorial on easyC?

RE: Private Messages

Author: MarkO
Posted: Thu Jan 21, 2010 4:39 pm (GMT -5)
Topic Replies: 3

Albertane wrote:

No, I'm sorry but PMs are completely disabled and will stay that way. You can't read your old PMs and you can't send new ones. I just checked the database, though, and there are no PMs in your box.

Could you "flush out" the two pending messages to me???
_________________
MarkO

FRC Team 957 "2007-2009 Professional Mentor"

http://vex.markdoverholser.com/notice.html

http://vex.markdoverholser.com/
http://tech.markdoverholser.com/

RE: CAD Models of Standard Vex Parts

Author: MarkO
Posted: Thu Jan 21, 2010 4:38 pm (GMT -5)
Topic Replies: 4

kourtney wrote:

What is the best CAD to alternate AutoCAD? I am looking for an alternative CAD program to AutoCAD.I need a low cost,but I should use the function of API such as VBA and ARX. Andbody have some suggestions?

I have heard good things about FastCad, and SolidWorks is a staple with USFIRST and other competitions.
_________________
MarkO

FRC Team 957 "2007-2009 Professional Mentor"

http://vex.markdoverholser.com/notice.html

http://vex.markdoverholser.com/
http://tech.markdoverholser.com/

RE: What is the most advanced commercially available robot?

Author: MarkO
Subject: Re: What is the most advanced commercially available robot?
Posted: Thu Jan 21, 2010 4:34 pm (GMT -5)
Topic Replies: 1

brandiex wrote:

What is the most advanced commercially available robot? It's like the RoboRaptors you see in your local Walmart. What is the most advanced commercially available robot artificial intelligence?

That is a good question.....

I am not sure I can give an answer....
_________________
MarkO

FRC Team 957 "2007-2009 Professional Mentor"

http://vex.markdoverholser.com/notice.html

http://vex.markdoverholser.com/
http://tech.markdoverholser.com/

RE: CAD Models of Standard Vex Parts

Author: Anonymous
Posted: Thu Jan 14, 2010 2:24 am (GMT -5)
Topic Replies: 4

What is the best CAD to alternate AutoCAD? I am looking for an alternative CAD program to AutoCAD.I need a low cost,but I should use the function of API such as VBA and ARX. Andbody have some suggestions?

RE: Private Messages

Author: Albertane
Posted: Wed Jan 13, 2010 3:38 am (GMT -5)
Topic Replies: 3

No, I'm sorry but PMs are completely disabled and will stay that way. You can't read your old PMs and you can't send new ones. I just checked the database, though, and there are no PMs in your box.
_________________
Riley McArdle

RE: Private Messages

Author: karthick
Subject: Private messaging regards
Posted: Wed Jan 13, 2010 12:24 am (GMT -5)
Topic Replies: 3

I cannot access my old PM. Can I access that? Can I send new PMs in future?