Slowing Motors in Driver Control

VEX V5 General Discussion General Forum
1

How do I slow my motors in Driver Control? I have a turret for a tank that I need to slow down. were using V2 for this project. can anyone help? I need an answer/solution soon since our pep-rally is on Wednesday morning

2
  1. you can gear it down (using physical gears)
  2. you can move the joysticks “slowly” (drive better)
  3. you can program the output to be 1/2 of the joystick (twice as slow) if you have enough torque (needs programming background)
  4. you can use a half dead battery if you have LOTS of torque

(#4 was a joke, but if you do not have time to do 1, 2, or 3 then you can attempt #4)

3

Here is how you can implement this Murdomeeks method 3.
I assume your existing turret programming looks something like this in EasyCv2.


MotorRcControl(t#,chan#,motor#,inv); // control turret

To lower the speed of the turret with programming, you’ll need to split this into 2-3 pieces; get the TX value to a variable, modify the variable, apply to motor.

EasyCv2 uses motor speed range 0 (ccw) to 127 (stop) to 255(clockwise),
so you can’t just divide the speed by 2 (or other value) because that will make 255 (full-on) turn into 127 (stop).
So subtract 127 first, then scale, then re-add 127.

Add 2 Variables:
unsigned char t_val 0;
unsigned float scale 1.8; // change this to be whatever scale you need

Comment out previous MotorRcControl(t#,chan#,motor#,inv);
Add these three lines instead

  t_val = GetRxInput(t#,chan#);
  t_val = ((t_val - 127) / scale ) + 127; // assignment statement pulldown
  SetMotor( motor#, t_val );

Good luck with your demo.