<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><FONT size="2">I know Gary Boucher with his " Vindicator" had a similar screw type arrangement .</FONT><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2">Brian</FONT></DIV><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2"><BR></FONT><BR><SPAN style="font-size: 10pt;">--- personal_submersibles@psubs.org wrote:</SPAN><BR><BR><SPAN style="font-size: 10pt;">From: Rick Patton via Personal_Submersibles <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">Subject: Re: [PSUBS-MAILIST] home made actuator</SPAN><BR><SPAN style="font-size: 10pt;">Date: Sun, 12 Aug 2018 16:54:48 -0700</SPAN><BR><BR><DIV style="font-size: 10pt;">I also like the idea of for/after trim especially when picking something with the arm or in my case, added aft buoyancy as I use the HP air in my aft outside aluminum 80,s. For blowing ballast. </DIV><DIV style="font-size: 10pt;">I know lower is better for CG but I thought I saw several years ago someone post a picture of a manual rolling tray just above the internal frames inside that had a thin slab of lead in it which may not give you enough pitch Hank but would be easy to fabricate being all internal and also possibly overcome light arm loads? </DIV><DIV style="font-size: 10pt;">Does anyone remember who that was with the tray?</DIV><DIV style="font-size: 10pt;"><BR></DIV><DIV style="font-size: 10pt;">Rick </DIV><DIV style="font-size: 10pt;"><BR><DIV><DIV>On Sun, Aug 12, 2018 at 4:25 PM Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR></DIV><BLOCKQUOTE style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><DIV><DIV></DIV><DIV>Hank, </DIV><DIV>more thoughts that you may not necessarily want to incorporate at </DIV><DIV>this stage. The linear actuator is just a turning threaded rod; if we</DIV><DIV>used an exposed underwater motor like the blue robotics item & corrosion</DIV><DIV>resistant gear box to drive a threaded stainless shaft, you wouldn't need</DIV><DIV>to oil compensate & seal the actuator & could have as much travel as you </DIV><DIV>wanted. You could even have enough travel to push the 400lb weight off </DIV><DIV>the end of it's track, making it a drop weight.</DIV></DIV><DIV><DIV>Alan</DIV></DIV><DIV><DIV><BR></DIV><DIV><BR>On 13/08/2018, at 10:56 AM, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV></DIV><DIV>Hank,</DIV><DIV>ok I follow now. The suggestion was just in line with my</DIV><DIV>" keep it simple" policy.</DIV><DIV>Cheers Alan</DIV><DIV><BR></DIV><DIV><BR>On 13/08/2018, at 10:48 AM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV></DIV>
<DIV>Alan,</DIV><DIV>Yes for sure, except I want to be able to tip the sub up or down to improve the visibility.</DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Sunday, August 12, 2018, 3:42:56 PM MDT, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV><DIV><DIV></DIV><DIV>Hank,</DIV><DIV>maybe Brian is right! Once the trim is adjusted correctly you wouldn't need</DIV><DIV>to touch it again would you? Unless you took your manipulators off</DIV><DIV>or something major like that.</DIV><DIV>You could dive just under the surface & get a diver to wind it, or</DIV><DIV>resurface, wind a bit & try it again.</DIV><DIV>Alan</DIV><DIV><DIV><BR>On 13/08/2018, at 5:29 AM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV></DIV>
<DIV>Brian,</DIV><DIV>Yes that is a great idea, just put the crank by the arm and use the arm to wind it in and out lol</DIV><DIV>Or I can just open a window and reach out. LOL</DIV><DIV>Hank</DIV>
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On Sunday, August 12, 2018, 7:42:27 AM MDT, Brian Cox via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV><DIV><DIV style="font-family:Arial,sans-serif;font-size:10pt"><FONT size="2">Hank, </FONT><DIV><FONT size="2"> You could always put a hand crank on it ! that would keep it simple ;-) </FONT></DIV><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2">Brian</FONT></DIV><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2"><BR></FONT><BR><SPAN style="font-size:10pt">--- <A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A> wrote:</SPAN><BR><BR><SPAN style="font-size:10pt">From: hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>></SPAN><BR><SPAN style="font-size:10pt">To: Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>></SPAN><BR><SPAN style="font-size:10pt">Subject: Re: [PSUBS-MAILIST] home made actuator</SPAN><BR><SPAN style="font-size:10pt">Date: Sun, 12 Aug 2018 11:51:48 +0000 (UTC)</SPAN><BR><BR><DIV><DIV style="font-size:13px"><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV></DIV>
<DIV>Brian,</DIV><DIV>I agree the acme thread rod would work well. In fact, that is where I started with the idea. I would need a gear box to up the torque and I am trying to keep it simple to build. If the other two options don't work out, I will be back to the acme rod.</DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Sunday, August 12, 2018, 5:05:26 AM MDT, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV><DIV><DIV><SPAN></SPAN></DIV><DIV><DIV></DIV><DIV>Hank,</DIV><DIV>that blue robotics motor was 4.5 in lbs torque. (.38 ft lbs) So you would</DIV><DIV>probably have to gear it anyway, or buy a motor controller that could</DIV><DIV>handle a lot of amps. They sell motor controllers for that motor. The only thing</DIV><DIV>that can be a bit problematic with the brushless motor controllers is that </DIV><DIV>if they are designed for the hobby market they are normally operated</DIV><DIV>via a transmitter & receiver not a potentiometer. There are electronics</DIV><DIV>to get round that. </DIV><DIV>I just bought a pressure sensor / temperature sensor & underwater switch</DIV><DIV>off Blue Robotics. </DIV><DIV>I am sure that actuator motor will be DC.</DIV><DIV>I will be interested to hear how you get on with it.</DIV><DIV>Alan</DIV><DIV><DIV><BR>On 12/08/2018, at 10:33 PM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV></DIV>
<DIV>Alan,</DIV><DIV>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.</DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Sunday, August 12, 2018, 3:57:07 AM MDT, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV><DIV><DIV></DIV><DIV>Hank,</DIV><DIV>what about using one of these 350W brushless underwater motors</DIV><DIV>from blue robotics!</DIV><DIV><A href="https://www.bluerobotics.com/store/thrusters/m200-motor-r1/">https://www.bluerobotics.com/store/thrusters/m200-motor-r1/</A></DIV><DIV>They sell them as rov motors & for that use I have reservations, as the prop</DIV><DIV>could drive sand etc in to the sealed windings & possibly wear through the</DIV><DIV>insulation. But for turning a threaded rod that moved your trim weight they</DIV><DIV>might be fine. Certainly save a lot of stuffing round modifying a linear</DIV><DIV>actuator. I saw these motors on a reasonably expensive rov recently.</DIV><DIV>Cheers Alan</DIV><DIV><DIV><BR>On 12/08/2018, at 9:45 AM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV></DIV>
<DIV>Alan,</DIV><DIV>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!</DIV><DIV>Thanks"</DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Saturday, August 11, 2018, 3:40:12 PM MDT, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV>Alan, </DIV><DIV>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.</DIV><DIV>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.</DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Saturday, August 11, 2018, 3:34:01 PM MDT, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV><DIV><DIV></DIV><DIV>Hank,</DIV><DIV>my first thought was satellite dish actuator.</DIV><DIV>This one is claiming 500lb capacity.</DIV><DIV><A href="https://www.ebay.com/itm/Venture-18-Inch-Linear-Actuator-36V-Jack-Arm-with-Saddle-Clamp-Satellite-Dish-/271574942987">https://www.ebay.com/itm/Venture-18-Inch-Linear-Actuator-36V-Jack-Arm-with-Saddle-Clamp-Satellite-Dish-/271574942987</A></DIV><DIV>But you wouldn't need that with horizontal travel. Any idea what force it</DIV><DIV>takes to pull / push it? I assume it is external.</DIV><DIV>Just wondering why you need 400lb! </DIV><DIV>Cheers Alan</DIV><DIV><BR></DIV><DIV><DIV><BR>On 12/08/2018, at 8:54 AM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><DIV>Hi All,</DIV><DIV>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. </DIV><DIV>Anyone have another idea?</DIV><DIV>Hank</DIV><DIV style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"></DIV></DIV></DIV></BLOCKQUOTE></DIV><BLOCKQUOTE><DIV><SPAN>_______________________________________________</SPAN><BR><SPAN>Personal_Submersibles mailing list</SPAN><BR><SPAN><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A></SPAN><BR><SPAN><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A></SPAN><BR></DIV></BLOCKQUOTE></DIV></DIV><DIV>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR></DIV></DIV></DIV>
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