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My new project - 'Transformer' Standup/Sit down driver cab
Cretster:
Actually - I've just been and had a look at it and given it a wobble and on reflection I'm not sure the cross braces you describe will help. When it's lowered they will help secure the tops but that's not a problem anyway. When raised though, the rods can't sway other than forwards/backwards (due to any movement/weight of the top cab tilting). The side to side movement is the top cab and linear bearings moving on the rods (one side up one side down, only a little) even if the rods are perfectly still. Shouldn't really be able to with two of those bearings per rod as that should provide quite a bit of rigidity but my guess is the rods are just a fraction of a mm below the ideal diameter and this provides enough slack for it all to flex since any tiny movement there is amplified as a fulcrum point.
I might try it anyway in case I'm overlooking an angle to this.
Cretster:
I think I have another solution now actually. A mixture of ideas.
My friend called round and suggested I put stops on the two rods, above the exact position of the upper linear bearing. This 'should' stop the side to side movement it can do when raised, since it prevents either side from moving any higher. I.e. one side cannot rock lower, if the opposite side cannot move higher, and vice versa. I think it's a great idea, and easy to implement. I may include some sort of rubber damper so that it's easier to exactly align the stop point of the ram, with the limit positions of these new stoppers.
So that should solve the side to side motion.
Re' the front to back tilting, I still think a strong wooden spine (or metal box even) on either side at the rear of the cab, can have a brace extending inwards to prevent the rods flexing forwards & backwards.
I'll try to draw a picture as it might make more sense.
Cretster:
Here's what I mean - the little red donut type bit gets fixed to the rod (screw through it) - not secured to the top cab half. But it prevents that side of the top cab moving any further up than the actuator limit by rocking. Same on other side. Ergo, it can't then rock side to side.
The spine bit at the back shows on the inside of the cab but would actually be behind it all, but basically a solid timber running up the back, with a brace that comes in to the top of the rod and prevents it flexing forwards or backwards. Therefore the second axis of unwanted movement is fixed.
Or something. Hope that makes sense!!!
hsr:
--- Quote from: Cretster on January 07, 2015, 09:42:38 am ---
--- End quote ---
Cool project! Is the 62t/64x going to allow you to play WaveRunner on this cabinet?
Cretster:
Ha ha!!! Good spot mate - it's from a squarenose superjet 650. I was given it by my brother as needing engine mounts and an impeller pump housing.
After I got it home and started to disassemble it, I soon found water in the crankcase, so that was that. A complete engine rebuild in the process now. Just need to pull my finger out and put it together.
Then I need to gelcoat (flocoat) the bottom of the hull as it's rubbed right through. Looks awful.
Might need a carb still, and a starter, and it has no exhaust currently. Plus pump housing to be replaced. Good few quid to be spent yet but at least I have everything for the engine itself. Even painted it with real Yamaha engine paint!
Can't wait to have it ready to try - never owned one before, but have boat & kayak and just love being on the sea. Specially living on an island!
Think I had an N64 emulator in it though so I can play waverace for practise! :D
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