As a matter of fact Rick, check out Brian Lula's observatory construction pics for ideas on your spherical mockup. Not that second monster of his, but the first one he built in his yard.
http://www.heavensgloryobservatory.com/
Ahh...too many interests, not enough life to do it all!
Joe
From: "Joseph Perkel" <joeperkel@hotmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] manipulator arms
Date: Sun, 04 Dec 2005 02:49:49 +0000
************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 311 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************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