Any hydraulic eng. designer's out there?

   / Any hydraulic eng. designer's out there?
  • Thread Starter
#21  
Thank you JJ, you have helped me and many here on TBN and I just wanted to get that out!
How does a guy figure out what "power" his work/task will take? I've been known to just throw expensive parts at projects until I get it right. The older I get, the more I stick with what I (kinda) know.
 
   / Any hydraulic eng. designer's out there?
  • Thread Starter
#22  
I am thinking you will have to be driving really really slow for a cyl to extend and return.

Actually JJ, I'm thinking that what ever I end up with, it will be on a 8'-10' pole and most operation will be with the machine stationary while making "arc's" with the cutter/loader boom. There will be times that I might move the machine while cutting, but with only a 4' or less cutting "swath" I'd have to make multiple passes. This make's me think it would be simpler to use the "arc" technique and complete the entire vertical cut in one pass of the tractor or skidsteer. This is of course without any experience using this type of cutter before.:laughing:
 
   / Any hydraulic eng. designer's out there? #23  
Rustyiron, if you are still wanting to use hydraulic rams to drive your mower, have a look at the way the blade circle on Motor Graders are setup. Some of the older types use 2 rams on a crank driving a pinion gear to angle the blade. It is a very simple setup.
 
   / Any hydraulic eng. designer's out there? #24  
I am thinking you will have to be driving really really slow for a cyl to extend and return.

As far as cutting ability, the cyl will have the power, but will the teeth you are pushing be capable of the job.

The smaller the cyl, the faster the extend and return, with the shortest stroke to allow a full open and close of the teeth.

Actually, a regen valve will double the speed on on extend stroke. Return stroke will be normal.

I still say the motor/blade combination is the better option.

J_J,
That website says it operates on a 3" diameter cylinder at 50 cycles per minute, so a little less than 1 stroke per second. Its interesting. Says it has a capacity of 4" or so branches. If find it interesting at the least. I'd like to see it in operation.
 
   / Any hydraulic eng. designer's out there? #26  
You can see it cycling the blades nice and slow. They say its very useful when you don't want things being flung like a rotary might do.
 
   / Any hydraulic eng. designer's out there? #27  
HA! Found a video of the Alamo Timber Cat in action. Actually looks like a factory demo...

https://www.youtube.com/watch?v=fcoC5Ovs3xE

Well, after watching that vid, you couldnt give me one of those mowers. With that said, I do happen to have the boom setup for a alamo frail mower for free if someone wants to come and get it. I took the mower head and mounted it on a small trackhoe. the 3pt hookup and pumps i gave away to a friend that had a similar mower that needed a few parts. The boom is just laying out behind the shop rusting. I also still have the boom cylinders and the control valves, but i would have to think about it before letting them go. Not really sure how many of the original parts I still have, just have to start digging, but it would make a great start for a project cutter setup.

Personally, I like the saw blades for trimming. Fast, clean, just stay out of the rocks and it works fine. I also have a 24in blade that needs retipped I'll let go, (FREE), with the boom. I wont ship so put on your driving shoes.

I'll see if I can get a few pics of boom and blade to post. I might have to trim the weeds before getting a pic of the boom.
 
   / Any hydraulic eng. designer's out there? #28  
Well, grabbed a few pics of boom and blade, plus what remaining parts I knew I still had. 0829151331.jpg saw blade is 24in, 70 tooth, carbide tipped, 1 1/2in bore, with probably half the carbide missing. Hit some concrete I think. Blade can be retipped about half the price of a new blade. 0829151333.jpg boom is about 12ft, give or take a little bit. It does have the flex back in middle. Not sure I still have the pins for it, I donot have the base where it hooks to the 3pt, nor any of the pumps.. 0829151334.jpg cable controls, Cables where sticking when removed, but they can be replaced reasonable. 0829151338.jpg control valve, is not power beyond capable.0829151335.jpg Hydraulic tank, 25gal I believe. 0829151337.jpg accumilator, have no ideal if its still good. Was working when removed, but been setting where you see it now for 4 or 5 years. Rest of the boom cylinders. I had them hooked up to a boom on my wood splitter but swapped out boom for a different one. These cyl are still hooked up because they use a odd ball #5jic fitting and I didnt have any caps to fit the hose ends. No, the hoses are not some metric something or other, they are #5jic, done been there and done that when looking for fittings.

Anyways, if anyone is interested, pm me for info how to get here.
 

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   / Any hydraulic eng. designer's out there? #29  
HA! Found a video of the Alamo Timber Cat in action. Actually looks like a factory demo...

https://www.youtube.com/watch?v=fcoC5Ovs3xE

watching video. noticed a lot of pile up on the cutting head

seem like operator having rough time controlling boom. even with good depth perception. seemed like stick in the mud bouncing around. kinda wondering how difficult it is to control such thing. with 2 feet not able to use breaks / go peddle, 1 hand on steering wheel and other hand on controls for cutter. never driven / operated one. but i could imagine someone trying to operate a backhoe with a single hand and having troubles.

most hedge trimmers for regular bushes around your home.... have teeth on both sides of the cutter. and watching this video as driver backed up just seem like a pain in rear.

overall unit seemed overall complex for the cutting head. (to much junk) on end of the boom for the cutting head.
 
   / Any hydraulic eng. designer's out there? #30  
HA! Found a video of the Alamo Timber Cat in action. Actually looks like a factory demo...

https://www.youtube.com/watch?v=fcoC5Ovs3xE
The head is too fat to allow the cuttings to bypass. Cuttings build up and foil the cut.

... Samurai works much better within the size it can pull the knife thru -- 1 to 1-1/4" hardwood. Cuttings bypass in typical sicklebar fashion.
 

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