The robot is also right.Code:
#pragma config(Hubs, S1, HTMotor, HTMotor, HTMotor, HTServo)
#pragma config(Sensor, S1, , sensorI2CMuxController)
#pragma config(Sensor, S2, ir1, sensorHiTechnicIRSeeker1200)
#pragma config(Sensor, S3, ir2, sensorHiTechnicIRSeeker1200)
#pragma config(Sensor, S4, safe, sensorTouch)
#pragma config(Motor, motorA, , tmotorNXT, openLoop)
#pragma config(Motor, motorB, , tmotorNXT, openLoop)
#pragma config(Motor, motorC, , tmotorNXT, openLoop)
#pragma config(Motor, mtr_S1_C1_1, wheel_left, tmotorTetrix, openLoop, reversed)
#pragma config(Motor, mtr_S1_C1_2, wheel_right, tmotorTetrix, openLoop)
#pragma config(Motor, mtr_S1_C2_1, motor3, tmotorTetrix, openLoop)
#pragma config(Motor, mtr_S1_C2_2, motor4, tmotorTetrix, openLoop)
#pragma config(Motor, mtr_S1_C3_1, lift, tmotorTetrix, openLoop)
#pragma config(Motor, mtr_S1_C3_2, light, tmotorTetrix, openLoop)
#pragma config(Servo, srvo_S1_C4_1, g_switch, tServoStandard)
#pragma config(Servo, srvo_S1_C4_2, servo2, tServoNone)
#pragma config(Servo, srvo_S1_C4_3, servo3, tServoNone)
#pragma config(Servo, srvo_S1_C4_4, servo4, tServoNone)
#pragma config(Servo, srvo_S1_C4_5, servo5, tServoNone)
#pragma config(Servo, srvo_S1_C4_6, servo6, tServoNone)

#include "JoystickDriver.c"

task main()
{
int mThreshold = 10;

int xVal, yVal, zVal;

float scaleFactor = 100 / 127;


while(true)
{
getJoystickSettings(joystick);

xVal = joystick.joy1_x1;
yVal = joystick.joy1_y1;
zVal = joystick.joy1_y2;

if (abs(xVal) < mThreshold)
{
xVal = 0;
}
if (abs(yVal) < mThreshold)
{
yVal = 0;
}

if(joy1Btn(4) == 1)
{
motor[wheel_left] = ((yVal) + (xVal)) * scaleFactor * 15/100;
motor[wheel_right] = ((yVal) - (xVal)) * scaleFactor * 15/100;
if (zVal < 0 && SensorValue(safe) == 1)
{
motor[lift] = 0;
}
else
{
motor[lift] = zVal * scaleFactor * 15/100;
}
}
else if(joy1Btn(4) == 0)
{
motor[wheel_left] = ((yVal) + (xVal)) * scaleFactor;
motor[wheel_right] = ((yVal) - (xVal)) * scaleFactor;
if (zVal < 0 && SensorValue(safe) == 1)
{
motor[lift] = 0;
}
else
{
motor[lift] = zVal * scaleFactor;
}
}
}
}

Let's take a look at what the variables and commands are doing purely from a numbers stand point:



The float scaleFactor equates to roughly 0.7874, while 15/100 equates to 0.15. Multiplying the two together will result in ~0.11811. Since the maximum theoretical value of the two joysticks together (yVal and xVal) is 254, you are looking at a theoretical maximum motor value of 254 * .11811 = 29.99 (or 30).

The problem is that the max value of 254 is theoretical and not realistically possible; the joystick ranges are physically round on the controller itself (you can't hit the 'corner' and have a max x and y value scenario) so the actual motor value will be even less than that. For instance, pushing the joysticks straight forward (all y values, no x values) nets you a motor speed of 14.99 (or 15), which may not be enough to even move the motors.

The best thing I can suggest is to tweak either scale factor values or the amount you are dividing the motor power by (try dividing by 10 instead of 100 and see what happens). This will allow you to send higher motor power levels to motors.

I'm sorry that I have tried to delete the scalefactor and the number like:
code:
motor[wheel_left] = ((xVal)+(yVal))
But it is still not moving,and in fact I have made sure that power > 10 can make the robot move by using labview.
I wonder if there are any problems in grammar or logic.
Thank you!

By the way,I have checked that "waitforstart()" doesn't influence.