Joystick Question

Voltage control?

thanks

how to reduce the voltage from 12 to 9 dcv example ?if i connect directly what will happen .

If proportional control, device will probably only move to 75% of full stroke. If speed control, speed will be 75% slower.

If you can provide a picture of the schematic, someone here might be able to help. Otherwise, we're totally guessing.

signal goes to solenoid valve to control hydraulic oil flow to control hoisting speed,of course solenoid coil receive 0 or 9 ~12 V DC digital signal not analog

Do you mean this?

|___1KΩ___
|____) (___|___1KΩ___
contacts

Also used in security and fire systems. The "end of line" resistor can have numerous connection points that will fault when open and read a known resistance when closed instead of a direct short.

4.7K Ohms = all is well

Zero Ohms = open door / fire / motion / etc.

Also, infinite (or very high) Ohms = some kind of problem that needs to be addressed.

I am guessing it is to 'match' the output of the joystick to a 4 - 20Ma control circuit.......the series resistor to stop the current going over 20mA

but joystick its digital signal on off

Please your help is very important,if I remove it what will happen?

It's not there just to make the circuit more complex, it's there for a reason. Why would you want to remove it?

To answer your question: if you remove it (and don't replace it with a direct connection), the joystick simply won't work.

Go back and read RAMConsult's post #6 a few more times, until you understand it. There is a reason why it has 6 GAs!

Joystick bare contacts may be digital, but controller's input circuitry is analog.

Joystick in neutral position, controller sees R1 + R2; joystick in operating position, controller sees R1; open signal conductor, controller sees ∞ resistance; short to ground, controller sees 0Ω.

Anything other than R1 + R2 or R1, plus/minus a tolerance for conductor resistance, controller takes no action and returns a fault code.