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Old 08-01-2005, 10:39 PM   #71
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Eureka!

Tonight i finally got the jacuzzi to move up and down. The job is far from finished, but it works!

This first photo is the jacuzzi all the way up....this caused it to not go back down properly........so the rest of the photo's have the jacuzzi a little lower.







Jacuzzi in the up position.....



Jacuzzi in the down position....


.
There is a really big hole in the roof! I'm not exactly certian how i'm going to remedy that yet......
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Old 08-02-2005, 05:00 AM   #72
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That is WAY COOL! All ya need to add now is one of those "clapper" devices. CLAP up! CLAP down!

NICE WORK! Can't wait to see the end result!
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Old 08-02-2005, 12:13 PM   #73
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That's just impressive as heck!

Quote:
There is a really big hole in the roof! I'm not exactly certian how i'm going to remedy that yet......
Corrugated sheetmetal roofing panels about 10 feet long? They take rounded contours very well. Each one is about 2 feet wide (after overlapping the edges). If you had them on a frame that split down the center of the bus, you could link them mechanically to the jacuzzi so that they would spread open as it rose. They wouldn't be strong enough to walk on, though, but they would be easy to pop-rivet to a frame of some kind. Plus, they're cheap.
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Old 08-02-2005, 01:04 PM   #74
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I don't know how you cut the roof, but if it was / is one piece, maybe you could build a frame that attaches it to the jacuzzi frame so it would just move straight up with the jacuzzi and act as a shade for it. Of course you'd have to configure a seal to go around it, but that would be simple compared to what you've already done.

Or you could try the Monster Garage approach the way they cut it in half and had the halves fold out?

By the way, have you procured your '2001 A Space Odyssey' sound track yet (to go along with the sound system & monolithic jacuzzi)?
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Old 08-02-2005, 02:24 PM   #75
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the man burns in 32 Days !!!!

I leave aug 23 for the trip.....that's exactly 3 weeks from today. there is so much to be done, but i'm confident the bus will be ready. She might not be 100 % finished (is a skoolie ever finished?) but she'll definately be ready for 10 days of fun and frollick in the desert.
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Old 08-04-2005, 10:13 PM   #76
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well......i'm frustrated today!

Just can't seem to get the hydraulic cylinders to all move at the same rate. the two in the back only have to lift half as much each as the one cylinder in the front. This makes the cylinders in the back go up first, twisting my custom made jacuzzi frame. It is impressive to watch 3"X1/4" channel iron get twisted like a wet noodle.

I tried straight air, then i tried air over hydraulic, then tried straight hydraulic, and none yeild satisfactory results.

I tried using multiple pressure regulators in the air system. That did make things much closer, but still not perfect.

Saturday when i get home from work, i think i'll try putting some proportioning valves into the hydraulic system and see how that works.

this portion of the project is sucking the life outtta me !!!
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Old 08-04-2005, 10:20 PM   #77
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Are they all three moving at different rates, or just the pair moving at a different rate than the single?

BTW - GOOD ANSWER on the proportioning valves!
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Old 08-04-2005, 11:26 PM   #78
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Automotive hoists use a set of cables to balance the cylinders, if one starts moving too fast it takes more of the load. Using a set of pulleys and cables can complicate things , but it prevents the twisting.
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Old 08-05-2005, 08:48 AM   #79
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I would use a inline orifice and you can drill them out untill you get the right flow to all your cyl. You can also get orifice that will orifice the flow on the way up and will free flow down. Plus they are chep to work with. also are you going to have some locks on all four legs once it is up???
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Old 08-05-2005, 10:31 AM   #80
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There's only three leggs....which is what's causing my problem. I think if there were four of them things would be much more even.

Yes, i plan to have a manual lockout mechanism when the jacuzzi is at full extention.

Instead of expirementing with different size orifices, i think i will try adjustable proportioner valves. Basically the valve should be just like an infinately adjustable orifice. (from closed to wide open)
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