Hydraulic arm - Electronic Circuits Projects Diagrams Free

nedrah · 17th June 2003, 01:22 PM

I am building an underwater crawler dredge with camera and would like a to have a hydraulic arm like the picture I am attaching. Any help on where I can purchase the hydraulic cylinder lifts or to fabricate the component ?

see picture.

**mechie** · 17th June 2003, 02:47 PM

Depends on where you are, what you want to spend, what power you need, stroke length, fluid to be used ...

For a start try Radio Spares in the UK

nedrah · 17th June 2003, 04:29 PM

mine is going to be a minature of the picture . My tracks are two feet long. I wil have a hose with a 3 inch diameter. It does not need to dig just to put the hose to the ocean floor and raise it up. Thanks for you quick reply

p.s. I live in the U.S. and am unable to order from the site you listed

afs87 · 29th June 2003, 02:15 PM

Hello,

Try http://www.alliedelec.com/ they are the U.S counterpart of Radio Spares.

Good Luck

lavenatti · 30th June 2003, 11:33 AM

Why not use pnuematics, it will be much lighter, cheaper and you could use your bouyancy tanks as air reservoirs. Since the air would just vent when you released the arm you could also see the bubbles on the surface and know its working. If a leak occurs, no big deal, but leave an oil slick on some bodies pond and you're going to have problems.

nedrah · 30th June 2003, 11:46 PM

I have already purchased various hydraulic cylinders lifts and power packs. I think pnuematics would be great but would they be able to propel the tracks.. Let me know.. thanks

**mechie** · 3rd July 2003, 12:50 PM

Pneumatics could easily run a motor - visit any garage and ask for a new tyre - pneumatic torque spanners, drills, etc are common.
You can only store so much air though, and when the "bouyancy tanks" are empty :?:

Hydraulic systems are commonly used where precision of position is required as there is much less 'spring' in the actuator.
I can't see any pollution problem with a water-filled hydraulic system, you also have the advantage of the robot being a constant weight (even if it leaks!) and so much easier to control its bouyancy, though the only bouyancy problem is likely to be staying down on the sea bed :!:

niranjan · 29th September 2003, 03:18 PM

Quote:

Originally Posted by afs87

Hello,

Try http://www.alliedelec.com/ they are the U.S counterpart of Radio Spares.

Good Luck

hi
everybody
iam from nepal
studying in nepal

17th June 2003, 02:47 PM	(permalink)
mechie Super Moderator	Vague answer toa vague question Depends on where you are, what you want to spend, what power you need, stroke length, fluid to be used ... For a start try Radio Spares in the UK __________________ I need a memory upgrade ... My head is full !

29th June 2003, 02:15 PM	(permalink)
afs87 New Member	Alternitive Store Hello, Try http://www.alliedelec.com/ they are the U.S counterpart of Radio Spares. Good Luck

30th June 2003, 11:46 PM	(permalink)
nedrah New Member	hydraulics vs pnuematics I have already purchased various hydraulic cylinders lifts and power packs. I think pnuematics would be great but would they be able to propel the tracks.. Let me know.. thanks

3rd July 2003, 12:50 PM	(permalink)
mechie Super Moderator	Choose a fluid ? Pneumatics could easily run a motor - visit any garage and ask for a new tyre - pneumatic torque spanners, drills, etc are common. You can only store so much air though, and when the "bouyancy tanks" are empty :?: Hydraulic systems are commonly used where precision of position is required as there is much less 'spring' in the actuator. I can't see any pollution problem with a water-filled hydraulic system, you also have the advantage of the robot being a constant weight (even if it leaks!) and so much easier to control its bouyancy, though the only bouyancy problem is likely to be staying down on the sea bed :!: __________________ I need a memory upgrade ... My head is full !

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17th June 2003, 04:29 PM	(permalink)
nedrah New Member	mine is going to be a minature of the picture . My tracks are two feet long. I wil have a hose with a 3 inch diameter. It does not need to dig just to put the hose to the ocean floor and raise it up. Thanks for you quick reply p.s. I live in the U.S. and am unable to order from the site you listed

30th June 2003, 11:33 AM	(permalink)
lavenatti Experienced Member	Why not use pnuematics, it will be much lighter, cheaper and you could use your bouyancy tanks as air reservoirs. Since the air would just vent when you released the arm you could also see the bubbles on the surface and know its working. If a leak occurs, no big deal, but leave an oil slick on some bodies pond and you're going to have problems.