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  1. #1
    Hi all
    I have 2 12v dc actuators connected to a 4 position joystick.
    i need to be able to control the speed of one actuator only. the other will run at full speed.Can you draw and or explain how i need to wire a 12v dc speed controller into this circuit. if i put in the motor out contacts it doesnt work because the power polarities change when the joystick is in a reverse position. Maybe have to run 2 complete circuits but how do i wire the joystick controller. thanks for any answers
    RichardClick image for larger version. 

Name:	Screenshot 2022-12-12 at 10-27-35 Joystick__4-Way__Control_of__Linear_Actuator.pdf.png 
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  2. #2
    ah, ignore this post.... I got it wrong

    If the speed control is positive side speed controlled (motor ground goes to ground) then insert the speed control output to drive pins 1&4 of the upper relay.
    Last edited by Doddy; 11-12-2022 at 11:31 PM.

  3. #3
    so your comment between 1&4 is wrong?

  4. #4
    this is the speed controller i got Click image for larger version. 

Name:	Screenshot 2022-12-12 at 11-38-08 DC Motor Speed Controller PWM Motor Driver 6-90v 10A - Buy Onl.png 
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  5. #5
    Quote Originally Posted by rjsutton View Post
    so your comment between 1&4 is wrong?
    Apologies - I can't believe what rubbish I wrote. The intent was to remove a previous reply (hence the "ignore this post"), with a possible follow-on solution. But that was as clear as mud, I read that now.

    In any case, having looked at all similar images of similar PWM controllers, in each case the Bat-/Mot- and Bat+/Mot+ pins are non-common. Question: Are you comfortable that the joystick can handle the start-up current of the motor? As you've drawn the schematic you're depending upon that behaviour. If so, there might be options, but may include a couple of diodes (and if not, an additional relay). The main thought process I have is to provide the PWM output via the change-over relay potentially with a third relay to isolate the motor if neither direction is demanded. If you're prepared for a third relay I can sketch something.

  6. #6
    Hi yes the joystick seems to handle the current at start no problems
    the schematic is just a downloaded one which i used to get the machine working.
    i can add relay etc as required. thanks for the help

  7. #7
    Hi Doddy
    if you can sketch circuit would be appreciated

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