[PSUBS-MAILIST] Closed view

[Jon Wallace via Personal_Submersibles]

Rick, true, this idea is for applications that require a lot of torque rather than speed.  Particularly useful for applications that do not require a large range of motion.  Speed can be adjusted somewhat via threaded rod pitch or by using a drill/screwdriver that has a faster RPM.

      From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Saturday, December 22, 2018 1:07 PM
 Subject: Re: [PSUBS-MAILIST] Closed view
   
Thanks Alan and JonThe screwdriver idea I assume would drive a piece of all thread like a worm drive to open and close the valve? In principle i think that would have enough torque to do the job but am concerned that the valve would open and close very slowly which I don't think would work for this application. What would be perfect would be a simple hydraulic ram with a 4" to 6" throw but then I would have to have all the stuff that comes along with having a hydraulic system, motor, resivore etc which I would prefer not to have to do to just operate one ram. Hank, aren't you using electric rams for your arm?  can you recommend an electric "preferably 12 volt" that would work?Rick 



On Sat, Dec 22, 2018 at 5:08 AM Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Rick, consider conversion of a cheap rechargeable screwdriver.  I've been experimenting with Black & Decker Li2000 which is low voltage (3.6vdc), low rpm (180), has a lot of torque, and is reversable.  At $15 they are pretty much expendable and easily replaceable.  

      From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, December 21, 2018 11:17 PM
 Subject: Re: [PSUBS-MAILIST] Closed view
  
You guys got me thinking about these solenoid's but for a different purpose. I fabricated a cable/pulley system for opening and closing my VBT flood valve as it is under the floor boards and not in a convenient location on a K-350. Do you Solenoid guys happen to know about how much pressure a plunger can exert? That might be a great way to rotate the valve 90 degrees easily.Rick   


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