[PSUBS-MAILIST] submersible motor

[Alan via Personal_Submersibles]

Brian,
an easier & cheaper way would be to use pneumatic cylinders, especially
if you don't want the expense & space of a hydraulic system.
Alan

> On 25/05/2020, at 6:59 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,              I think I would sit on the bottom first and then try to pick something up, that way not be effected by surge so much.   Where I am there is not really silt more sand really so I wouldn't be stirring things up by being on the bottom.
> 
> Brian
> 
> 
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] submersible motor
> Date: Mon, 25 May 2020 18:48:28 +1200
> 
> Brian,
> no they don't. I was thinking of making up my own gear train with plastic or 316
> gears. I was going to work backward; make the gripper, then gripper rotation,
> then wrist & by that time I will know what weight I have, & how much power or
> gearing I need for the next joint.
> With your boat you will need a strong manipulator. As a diver you might have
> Experienced a wave surge at depth. If you were going to pick something up & a wave surge hit your sub you could have the weight of your sub driving your manipulator in 
> to rocks.
> I know Vance commented that light weight manipulators get broken easily.
> Alan
> 
> 
> On 25/05/2020, at 5:57 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,       How are those blue robotics motors?  Do they make gear motors?
> 
> Brian
> 
> 
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] submersible motor
> Date: Mon, 25 May 2020 17:42:04 +1200
> 
> Hi Brian,
> I am ahead of you on this idea.
> I bought these two car window motors that have been adapted for robotics,
> thinking I could use them on a manipulator arm joint. 
> I went off the idea as they would need a waterproof casing & seal on the output
> shaft as well as oil hoses running to them from a compensator ( if you wanted to
> do it well). Also they are a bit weak for using in the first couple of joints.
> I am now liking the idea of a water hydraulic cylinder on the first 2 joints & using
> the blue robotics waterproof motor for the last joint, wrist & jaws.
> Ian Juby who is new to Psubs is an expert in robotics. Listen to him if he chimes in.
> Also the motors would need a motor controller that limited the amp draw or you 
> could burn them out if they stalled.
> Alan
> 
> <image1.JPG>
> 
> 
> 
> On 25/05/2020, at 3:37 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi All,
>                 Thinking about oil filling this gear motor for a arm I have in mind 
> 
> https://www.alibaba.com/product-detail/90mm-Waterproof-PMDC-12v24v-worm-gear_60771058320.html?spm=a2700.7724857.normalList.40.74ab140ekRVq5Q
> 
> 
> Brian
> 
> 
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