[PSUBS-MAILIST] Speed and Direction Control for Small Brushed Motors

[Rick Patton via Personal_Submersibles]

 accuator.MOV
<https://drive.google.com/file/d/18bODTGRsD-O2wLi_XYbJBwPI7o27oMRL/view?usp=drive_web>
Jon
I posted this awhile back and am not sure if you saw it but this is what I
have chosen to do with my steering for the aft motor on my K sub as I
didn't like the way the yoke was in the way of the person laying down. I
have only dry tested it and I like how it works but have yet to test
its performance in the water. I am also using a gauge in the sub that shows
the position of the motor as I have this same set up on my sailboat and it
really works well. I can't find the video of the steering one but I am
using the same principle to open and close the flood valve for the VBT
which I have attached.
Hope this helps
Rick

On Fri, Jul 9, 2021 at 3:36 AM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I've thought about that as well but haven't got there yet.  A simple
> potentiometer connected to the rudder would be enough to give feedback
> regarding its position if I can come up with a way of waterproofing it.  I
> recall Alan trying to deal with this years ago and not sure if he did find
> a solution or not.  In terms of returning to center position, just not
> there yet.  If anyone has suggestions, I'm open.
>
> Jon
>
>
> On Friday, July 9, 2021, 09:11:47 AM EDT, Cliff Redus via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Nice work Jon; well documented and helpful.  I have found that to make fly
> by wire work for control surfaces, you need a position sensor and/or  have
> the ability for the control surface to return to a neutral position through
> the joystick sending out a centralized position signal.  What are you
> planning to use on your boat for rudder feedback?
>
> Thanks for this excellent contribution to site.
>
> Cliff
>
> On Thursday, July 8, 2021, 11:07:50 PM CDT, Jon Wallace via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> For a couple of weeks I've been toying with the idea of a "fly-by-wire"
> approach to rudder control.  I really don't like the idea of manually
> operated foot control found in K-subs and while thinking about how I might
> implement a hand control I started delving into a fly-by-wire solution
> after seeing a youtube video on a totally unrelated topic demonstrating
> small motor controllers.
>
> I've converted a 5 volt hand-held power screwdriver into a 1-ATM housing
> partially filled with oil for lubrication purposes.  The torque on these
> small things are quite impressive and I believe may be strong enough to
> handle a rudder.  Even if it isn't, I can still use the motor for something
> else.
>
> I combined a small motor controller that can handle 10 amps, with a TEENSY
> microprocessor, and a joystick which allows me to control motor spin
> direction, and speed.  It works amazing and total cost was about $60.  If
> you've got a purpose for a small electric motor with speed/direction
> control, you might find this project interesting.  I've written a paper and
> also included software, both available at PSUBS.ORG > PSUBS Community >
> Community Projects > Speed and Direction Control for Small Brushed Motors.
>
> Direct link:
> http://www.psubs.org/community/projects/moto-1.pdf
>
>
> Jon
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