|
Phil, Perfectly clear thank you! The information is invaluable to anyone contemplating an arm. I will continue to look at electromechanical, since I would reverse engineer the little Lynx motion toy into a larger working PSUB arm. Since it would be what I would have at hand to copy, (no access to a hydraulic system or plans). But, a single hydraulic hand pump to the detach mechanism, (hybrid system) is the order of the day. Thanks so much Phil! > Date: Thu, 9 Oct 2008 11:58:24 -0400 > From: pnuytten@compuserve.com > Subject: RE: [PSUBS-MAILIST] Manipulator actuation / design > To: personal_submersibles@psubs.org > > Message text written by INTERNET:personal_submersibles@psubs.org > >< > > Hi, Joe: > Yup, you got it right . The reason for running the QD's thru' an > outside flange is the sleeve actuation plate. Suppose your arm is round - > with the QD sleeves arranged around the flange - then the holes in the > sleeve actuator plate are not holes, but are round-bottomed slots that are > open around the perimeter of the sleeve actuator plate. These can be milled > into the relatively thin sleeve actuator plate or drllied and then opened > up with a hacksaw and file. The slots fit snugly around the 'wasp-waisted' > actuator sleeves themselves . Since the QD sleeves turn easily and > independantly of the female QD - you can slide/load all of the female QDs > onto the sleeve actuator plate BEFORE you screw them into the threaded arm > end-plate. The short piston goes between the arm end-plate and acts to pull > all the detent sleeves simultaneously - only about a half inch of piston > rod travel is required. > You could put a cluster of QDs in the center for neatness - but the > piston is in the center, so it usually easier to put them around the > outside (with a protective sleeve (if you wish). > We do exactly the same thing as this whole assembly - but weithout the > QDs. It involves some close tolerance machining, so the QD approach is > probably more useful for 'garage sub-builders' (G) > Hope this helps clarify. > Phil > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > 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 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > |