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Re: [PSUBS-MAILIST] manipulator
Hi Pierre 'the claw' Poulin,
I for one would to use anything you produce - i had really wanted to include a manipulator (and hadnt totally discounted it), but figured the control would be beyond me (i figure on/off and open/closed should be my aspirations at this early stage). this maybe puts it back into range again :)
a few questions:
1. do the hydraulics work at pressures above ambient, or from 1 ATM, or am I missing something? My concern is that the external pressure is going to be high - wont this fight against the manipulator? or is the hydraulic pressure so high ambient is negligible? does it rely instead on boosting hydraulic pressure from ambient?
2. how do you normally control these? I think finger control is far too complex, but the gripper could maybe be controlled through a 'data mitt' rather than a 'data glove'? do these just work like waldos?
3. could things like OTS car haydraulics (eg power steering) be used to drive these systems
4. can the whole arm be jettisoned if it gets fouled or tangled?
5. what do you do with samples? hang on to them until you surface? put in a hopper (open or closed)? and related - just what do you want to use the arm for? - aside from 'it just seems like a kewl/sensible thing to have' (which is why i originially wanted it)
cheers
peter
-----Original Message-----
From: pierre&marie <poulin.carrier@videotron.ca>
Sent: Jun 28, 2004 9:45 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] manipulator
Hi Dan,
Hello Marten,
I did build 3 manipulators at work so i have some experience with them. But
nothing for under-water...
What type of manipulator are you looking for? Maybe we can share plans and
drawings? I was thinking something like the arm that we see at the back of
excavators but with a gripper at the end. What about you?
Yes, I will use a canister type with air and oil together but with a
flexible diaphragme (spelling) to separate the oil from the air. And it will
be a close circuit. The trick is to use two canisters and switch from one to
the other with the returning oil.
Let me know what you think! We could make ours plans available to all.
Pierre "manipulator" Poulin
----- Original Message -----
From: "Dan H." <jmachine@adelphia.net>
To: <personal_submersibles@psubs.org>
Sent: Sunday, June 27, 2004 12:59 PM
Subject: Re: [PSUBS-MAILIST] Golf Cart Motor over Hydraulic
> Pierre,
>
> I've been giving some thought to manipulators myself. Nothing on paper
yet.
> I was thinking about trying DC gear motors filled with oil. I don't need
> anything fancy, just workable.
>
> Air over hydraulic would be good I guess. The air over hydraulic power
> packs I've seen take quite a bit of air and they generate very high
pressure
> hydraulics, in the 10,000 PSI range. You don't need that for
manipulators.
> I've seen an air over hydraulic system where they simply filled a canister
> with oil and injected air above the oil. The oil comes out at the same
> pressure as the applied air. Only thing is, after using the pressurized
oil
> you have to vent the remaining air and return the oil to the canister.
The
> advantage is that your controlling oil and not cushiony air.
>
> Let me know what your thinking about in a manipulator. Maybe our needs
are
> similar.
> I was thinking it would make a good winter project.
>
> Dan H.
>
> ----- Original Message -----
> From: "Pierre Poulin" <pipo305@hotmail.com>
> To: <personal_submersibles@psubs.org>
> Sent: Sunday, June 27, 2004 8:04 AM
> Subject: Re: [PSUBS-MAILIST] Golf Cart Motor over Hydraulic
>
>
> > Hello,
> >
> > What about pneumatic power? Since we already have compressed air
> available?
> > There is a system that convert compressed air to hydraulic power.
Removing
> > the rubber feeling of only pneumatic system but with-out the need for a
> pump
> > and motor. Of course, the power of the manipulator is smaller with
> pneumatic
> > but could be ebought...
> >
> > I'm already making plans to build a small manipulator with this system.
> >
> > Any tough?
> >
> > Pierre Poulin
> >
> >
> > >From: Fly Deep <flydeep4u@yahoo.com>
> > >Reply-To: personal_submersibles@psubs.org
> > >To: personal_submersibles@psubs.org
> > >Subject: Re: [PSUBS-MAILIST] Golf Cart Motor over Hydraulic
> > >Date: Sat, 26 Jun 2004 07:03:24 -0700 (PDT)
> > >
> > >Unfortunately hydraulic power is almost the only practical option for
> > >manipulators.
> > >DJB
> > >
> > >
> > >---------------------------------
> > >Do you Yahoo!?
> > >Yahoo! Mail - 50x more storage than other providers!
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> >
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