[PSUBS-MAILIST] home made actuator

Sun Aug 12 06:33:09 EDT 2018

 Alan,That is a very slick motor alright, but it needs a controller.  You know how I try to avoid electronic components whenever possible.  Also i am trying to keep the cost down by using parts that I already have.  I have a satellite dish actuator and I have a trolling motor on the shelf.  I am picking up the actuator today from the shop and bringing it home to tear down.  I am quite excited that it might be DC.Hank
    On Sunday, August 12, 2018, 3:57:07 AM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Hank,what about using one of these 350W brushless underwater motorsfrom blue robotics!https://www.bluerobotics.com/store/thrusters/m200-motor-r1/They sell them as rov motors & for that use I have reservations, as the propcould drive sand etc in to the sealed windings & possibly wear through theinsulation. But for turning a threaded rod that moved your trim weight theymight be fine. Certainly save a lot of stuffing round modifying a linearactuator. I saw these motors on a reasonably expensive rov recently.Cheers Alan
On 12/08/2018, at 9:45 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Alan,I just had a look at the one you found, and I did not realize they were DC.  I thought they were AC, well that is awesome!Thanks"Hank
    On Saturday, August 11, 2018, 3:40:12 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

  Alan,  I think they are probably song enough, I just swap the AC motor out.  I don't need 400 lbs to do the job but I need 400 lbs of ballast.  I am actually planning to make a moving cradle that also carries the oil filled batteries.  I don't know how much force it will require, but, the cradle will be on rollers to make it easy.I am ready to test for balance, so I will have to switch over to building a test pool.  My plan to put an in ground pool in my new shop is out now because there is a giant lathe in the way.Hank
    On Saturday, August 11, 2018, 3:34:01 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Hank,my first thought was satellite dish actuator.This one is claiming 500lb capacity.https://www.ebay.com/itm/Venture-18-Inch-Linear-Actuator-36V-Jack-Arm-with-Saddle-Clamp-Satellite-Dish-/271574942987But you wouldn't need that with horizontal travel. Any idea what force ittakes to pull / push it? I assume it is external.Just wondering why you need 400lb!  Cheers Alan

On 12/08/2018, at 8:54 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi All,I am in need of a long stroke electric actuator to move my 400 lb trim weight.  Of coarse I want to make one.  I am planning to either add a oil filled trolling motor to a trailer jack or mount the trolling motor to a satellite dish actuator.  I have not dismantled the satellite dish actuator yet to see if it can handle the job.  I think it can but I will see.  Anyone have another idea?Hank

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