Re: CAT330D-L full hydraulic
 

... one of the best buildings ever seen, Congrats !

:cool:;):cool:;):cool:

Re: CAT330D-L full hydraulic
 

Many thanks to ricm and to gipicarto....
Per qunto riguarda gipicarto... scriviamoci in italiano visto che sono di Firenze!:D
Tu non mi conosci ma io conosco molto bene il tuo lavoro e... in un certo senso mi sembra di conoscere anche te. Siccome non ho mai avuto l'occasione di complimentarmi lo faccio adesso anche se è un piccolo O.T.. Non ho ancora avuto il piacere di vedere la tua macchina in movimento e mi piacerebbe moltissimo.
Grazie dei complimenti, faccio solo del mio meglio.

Goodbye everyone, see you soon!

Re: CAT330D-L full hydraulic
 

Erick 79
Nice build very interested in your Hydraulic motors and how they will work, The only thing I've built is the hydraulic pumps to run my models

Earl

Re: CAT330D-L full hydraulic
 

Thank you Old Guy, i hope to show you the running motor in video as soon as possible.

Bye...

Re: CAT330D-L full hydraulic
 

Erick 79 your pluming work is excellent especially the tight turns I have tried them before and I know how hard they are. The rest of your machine also is superior also. Ed

Re: CAT330D-L full hydraulic
 

Thanks Jammer, the plumbing work is less simple than it seems, it's true.
For the more tight turns in fact i have choosen to use the copper tube than the brass one. Moreover i have used some little brass wheels built by lathe with the same radius of the bend on the external and the radius of the tube in section; this is to prevent the buckling of the tube.
The problem on this kind of model is that we have to use tubes of bigger dimensions than the real machine and is very hard to find the way they have to pass through... :)

Re: CAT330D-L full hydraulic
 

Hi, i am here again with another little step...

http://i.imgur.com/wRVUzCX.jpg

http://i.imgur.com/ThUTVS1.jpg

http://i.imgur.com/EoDcQ3e.jpg

http://i.imgur.com/KURrFgq.jpg

http://i.imgur.com/5sXiZGN.jpg

This counterweight is only the model to cast the real piece with aluminium and first it has to be fed up, sanded, smoothed and Painted.
For now i only have started to fed it up...

Bye...

Re: CAT330D-L full hydraulic
 

Hi everyone, on monday i finished to prepare the model of the counterweight and i painted it. I have done some modification to the shape of the hooks for casting requirement.

http://i.imgur.com/bIzeTlf.jpg

http://i.imgur.com/8367mJd.jpg

http://i.imgur.com/10fZ5uA.jpg

And today i have got the casted piece...:D

http://i.imgur.com/usxMe6W.jpg

http://i.imgur.com/tPOLJrV.jpg

http://i.imgur.com/nreabFR.jpg

http://i.imgur.com/MAR4gaf.jpg

http://i.imgur.com/5DUzWvh.jpg

http://i.imgur.com/rf7NTzd.jpg

Goodbye everyone.:)

Re: CAT330D-L full hydraulic
 

Why aluminum for the counterweight?

Re: CAT330D-L full hydraulic
 

Hi avel,

I have choosen to build the model without iron parts because it's made for the work and by time is unavoidable that paint wear out and i prefer to don't have rust. So the project is born mainly with aluminium, brass and stainless steel.
In this configuration the center of gravity is very close to the axis of the swivel flange because the full metal undercarriage and platform plus the ni-mh batteries already helps to draw back the CoG. On the other hand the aluminium boom and stick are not so heavy. So i have no reason for trying to draw back more the CoG maybe with iron counterweight. :)

See you, my greets.

Enrico

Re: CAT330D-L full hydraulic
 

Hello, here some other photos of the assembly only to see the general appearance...

http://i.imgur.com/hNQRfDT.jpg

http://i.imgur.com/q5dtFV0.jpg

http://i.imgur.com/Ic7Rrc9.jpg

http://i.imgur.com/qlzGkJa.jpg

http://i.imgur.com/dQR9X9u.jpg

http://i.imgur.com/dQR9X9u.jpg

See you....:)

Re: CAT330D-L full hydraulic
 

Very nice!

Re: CAT330D-L full hydraulic
 

wow!!

Re: CAT330D-L full hydraulic
 

Stunning work!!! I am definitely going to follow this one!

Re: CAT330D-L full hydraulic
 

That counterweight is beautiful. It looked like a very clean casting, even before you smoothed and finished it. Great work!

Re: CAT330D-L full hydraulic
 

Thanks everyone!
Yes espeefan, the piece is well casted by the guys that have done the work. I have not the possibility to do a work like that from myself.
Now the next challenge is to build the opened center valves and more difficult is to put nine of them into the width of the cabin in an in-line assembly. The space available is 200mm of width and 59mm of height. I'm not a fan of the accessories like tong or quick tool change but i prefer to have the possibility to add them in the future.
I have already start to build the prototype of the valves and in a few days i'll test it and know if it works well or not.

See you soon.:)

Enrico

Re: CAT330D-L full hydraulic
 

Hi Enrico

This is a great build thank you for sharing with us all on the forum.
The quality is of the highest order.
keep up the good work.

Regards

Mark

Re: CAT330D-L full hydraulic
 

Hi Mark, many thanks!
Hope to have news soon...

Re: CAT330D-L full hydraulic
 

Hi, like i said i have worked on the open center valves and now i have done the prototype and started to test it.

The system working pressure is 22 Atm, relief pressure is 2-3 Atm with a current drain of 1,5-1,8 Amps and the pump at 20% of "gas". The valve has a dead-zone of 4° per side and in the center position the cylinder is well locked.
The proportionality is very good and the effort needed to rotate the valve is not much, but i have to measure it. In the video below i test 3 different rates, normal, high speed and something like an "inching mode" and it seems to work well in all the ones, so i am quite satisfied.

http://i.imgur.com/VG7mc0E.jpg

http://i.imgur.com/XWqKsrD.jpg

https://www.youtube.com/watch?v=6rOSZWjEAQI

My greets,:)

Enrico

Re: CAT330D-L full hydraulic
 

Very fun to watch the progress.

How do you make the tight bends in the small tubing and kink? The pictures are very nice!

Jim