[PSUBS-MAILIST] Joystick

[Sean T. Stevenson via Personal_Submersibles]

I would stick with an intuitive control scheme, and find a joystick with three axes. Forward / back Y axis corresponds to ahead / astern propulsion (surge), left / right X axis corresponds to straight lateral motion (sway), and rotating the stick clockwise or counterclockwise around the Z axis corresponds to turning (yaw) motion. Three axis sticks are pretty common industrial controls, although I don't know about meeting your budget. For depth control (heave), you could use a stick with an additional thumb wheel or accessory axis, or make use of a simple switch, but ramp the output in proportion to how long you hold the digital state changed. You could also have a button which toggles e.g. your stick's Y axis between surge and heave control modes. Wanting single stick control limits your options a bit, unless you're also using a PLC / PAC, in which case you could use joystick buttons just to jog your depth setpoint, and rely on other code to actually implement an associated control algorithm.

Sean

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-------- Original Message --------
On Feb 26, 2018, 14:48, Alan via Personal_Submersibles wrote:

> Should mention that the buttons or whatever for the vertical
> thrusters will have to be analogue to give me speed control,
> & not on & off.
> Cheers Alan
>
> Sent from my iPad
>
>> On 27/02/2018, at 10:36 AM, Alan via Personal_Submersibles  wrote:
>>
>> Am looking for a semi industrial or industrial joystick for controlling
>> 4 thrusters; two vertical, two horizontal.
>> I want to operate it with one hand. The X axis will be the horizontal thrusters
>> throttle forward & reverse, the Y axis is the horizontal thrusters proportional
>> speed for turning ( pretty standard ). The vertical thruster control is what I
>> am having trouble with; I want it to be as intuitive as possible & have seen
>> buttons on joystick shafts that could be used for up & down. In the attached
>> picture the buttons are on the top of the shaft in the left hand example.
>> I am also wanting the unit pretty small, so small intuitive, one handed operation.
>> It doesn't matter if there is a few extra buttons as I could use these for lights
>> or display control etc.
>> If anyone knows of anything, or has a better solution, I would be interested
>> thanks. Oh yeah, & not really expensive!
>> Alan
>>
>>
>>
>>
>> Sent from my iPad
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