Rick,
"Want to start the hull mockup but have not yet figured out how the make a hemisphere form plywood yet."
There are good hints about this within the homebuilt astronomical observatory community.
Joe
From: "rick miller" <rickm@pegasuscontrols.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: [PSUBS-MAILIST] manipulator arms
Date: Sat, 3 Dec 2005 17:32:49 -0800
hi guysI solved the rotation problem and found a pump to use for the hydraulics. parker has a piston pump that will withstand 500 psi on the inlet and is available in 48 volt dc so i can use a pressure comp resivor and flood the solinoids in it. And using parker te series hyd motor for the rotation of the claw i shoud be able to get about 2 - 10 rpm using a pwm for the motor controller. i called alllen bradley about using one thier remote i/o packages in the resivor, they had some missgivings about it, but i figure if i epoxy encapsulate it it should live . That will save a lot on hull pentrations because i will only have a power feed/ 2wire and a data feed/2 wire. Still working on a budget price of about 2000.00$ for the parts for both. will start building the mockup soon. Want to start the hull mockup but have not yet figured out how the make a hemisphere form plywood yet. The basic plan still calls for no mechanical hull pentrations. I also found a great manufacture for brass and stainless hyd rams. the base pivots and wrist pivot use off the shelf food grade pillow block bearings, stainlesss and composite, wanting on the manufacturer to get back to me with the mount strenghts.rick m