[PSUBS-MAILIST] Manipulator

Wed Feb 11 14:17:18 EST 2015

Alan, 
I looked into air, but it presents some problems. One is compensating it otherwise you will get less preformance based on depth. Two is they are not as stiff and have give as well as less fine control. Also another problem is if you used compressed air, you have a limiting factor or you could use a compressor, but have to have a bank to draw from.
The main draw back of hydraulic for me was the mess and polution factor. Otherwise, hydraulic seems to be the way to go.
I am hoping to come up with a manipulator design that can be used on most psubs that is easy and affordable.
Thanks,
Scott Waters

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-------- Original message --------
From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org> 
Date:02/11/2015  12:52 PM  (GMT-06:00) 
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Cc:  
Subject: Re: [PSUBS-MAILIST] Manipulator 

Hank,
why not just use air if the pneumatic cylinders are rated for 150 psi.
If they are rated for 150 psi it would be assumed that their mechanical strength
would match the load they can lift with 150 psi also.
Is there any advantage other than the o ring working both ways to stop water
ingress, as you have said previously. Does anyone else use them in place
of hydraulic cylinders?
Alan

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Thursday, February 12, 2015 7:21 AM
Subject: Re: [PSUBS-MAILIST] Manipulator

No problems, Gamma has air cylinders and at 1,000 feet the hydraulic pump is set at 1,100 psi.  Your K sub can have a pressure setting of 500 or less and work just fine. Remember, your not lifting a lot just the arm plus a bit.
Hank--------------------------------------------
On Wed, 2/11/15, swaters at waters-ks.com via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Subject: Re: [PSUBS-MAILIST] Manipulator
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Wednesday, February 11, 2015, 12:23 PM

Do you
have any problem with over pressure though? The pnuematic
cylinders are rated to 150psi with air and 1000 psi with
oil. Thanks,Scott
Waters

Sent from my U.S.
Cellular® Smartphone

-------- Original message
--------
From: hank pronk via
Personal_Submersibles
<personal_submersibles at psubs.org> 
Date:02/11/2015  11:12 AM  (GMT-06:00) 
To: personal_submersibles
<personal_submersibles at psubs.org> 
Cc:

Subject: Re: [PSUBS-MAILIST] Manipulator

hi Scott
use a
hydraulic pump just the same as if you used hydraulic
cylinders
Hank          

                                From:

                            swaters at waters-ks.com via
Personal_Submersibles
<personal_submersibles at psubs.org>;                    

                                To:

                            psubs
<personal_submersibles at psubs.org>;                    

                                Subject:

                            [PSUBS-MAILIST] Manipulator    

                                Sent:

                            Wed, Feb 11, 2015 3:39:07 PM    

                            Hank,I know you
said to use pnumatic cylinders  for the manipulator arm.
What kind of pump do you
use?Thanks,Scott Waters

Sent from my U.S.
Cellular®
Smartphone

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