building a firewood processer

[ihuntbear]

I talked to a guy that has a homemade processer today .He said his saw and down force works off one motor spool.he said he tees off the return line off the motor and put a check valve before the tee.When he tees off he added a pressure reducing valve ,a flow reducing vave that goes to the cylinder.The other line from the cylinder goes back to the motor spool.On the other side of the tee from the motor goes to the tank.That way when you want the bar to raise the motor stops and the cylinder retracts.Does that make sense?

 

[glastron23]

Bear.. what type of saw motor are you using, the Danzco one?? we used a Parker F11, if you want to spend the money it comes with a pressure compensated cylinder control valve built in to control the down pressure on the saw chain as it comes into contact with wood, the more teeth in wood the slower the saw is advanced into the wood, this feed back from the motor required to prevent overloading/stalling the chain in the wood, on the older tree harvesters it was a real problem. breaking a chain is pain, breaking teeth off the chain (chain shot) is just dangerous. http://www.parker.com/literature/HY30-8252-B1-UK.pdf

 

[glastron23]

I talked to a guy that has a homemade processer today .He said his saw and down force works off one motor spool.he said he tees off the return line off the motor and put a check valve before the tee.When he tees off he added a pressure reducing valve ,a flow reducing vave that goes to the cylinder.The other line from the cylinder goes back to the motor spool.On the other side of the tee from the motor goes to the tank.That way when you want the bar to raise the motor stops and the cylinder retracts.Does that make sense?

you can't do this .. motors do not like back pressure,, gear types will blow out the front seal and axial pistons will be reduced in power due to back pressure... the return line should go back to tank unimpeded ....

 

[Scooby074]

Bear.. what type of saw motor are you using, the Danzco one?? we used a Parker F11, if you want to spend the money it comes with a pressure compensated cylinder control valve built in to control the down pressure on the saw chain as it comes into contact with wood, the more teeth in wood the slower the saw is advanced into the wood, this feed back from the motor required to prevent overloading/stalling the chain in the wood, on the older tree harvesters it was a real problem. breaking a chain is pain, breaking teeth off the chain (chain shot) is just dangerous. http://www.parker.com/literature/HY30-8252-B1-UK.pdf

If you dont mind me asking what did you pay for the F11 over here ( i have a price for used from europe)? Also do you happen to remember the price for the compensated model with the added control valve? Id like to build a processor around the F11 assuming its in the budget.

 

[glastron23]

scooby .. thats the problem.. they are NOT CHEAP... i lucked onto 2 used F-11 motors only that came off a harvester head, one had the chain catcher and both were machined for the 404 drive sprockets.... they did not come with the compensated valves.. Dam it... payed 250.00 cdn and had to rebuild the one i used

 

[ihuntbear]

i"m using the Danzco basic saw

 

[glastron23]

for the saw feed control we built our control very close to this one.. just 2 Sun valves were changed
Feed & Motor Control
we built the oiler cylinder and valves our selves... very cheap to build..

 

[glastron23]

here is some good reading... Ed has updated the site since the last time i researched things Firewood Processing White Paper

 

[Scooby074]

scooby .. thats the problem.. they are NOT CHEAP... i lucked onto 2 used F-11 motors only that came off a harvester head, one had the chain catcher and both were machined for the 404 drive sprockets.... they did not come with the compensated valves.. Dam it... payed 250.00 cdn and had to rebuild the one i used

That jives with what i was told. Add few hundred for the rebuild and you got the same price.

I noticed that Danzco has no prices listed. He seems like the type thats rather "proud" of their products so i bet theyre pretty expensive too?

Heres a quick sketch of what im planning, but the more i think about it, im likely going to keep it simple and just build the split section with the adjustable wedge, then i can add the processor when i round up cheap parts.

 

[AKKAMAAN]

That jives with what i was told. Add few hundred for the rebuild and you got the same price.

I noticed that Danzco has no prices listed. He seems like the type thats rather "proud" of their products so i bet theyre pretty expensive too?

Heres a quick sketch of what im planning, but the more i think about it, im likely going to keep it simple and just build the split section with the adjustable wedge, then i can add the processor when i round up cheap parts.

That Parker F11-iP saw motor can defend its 2000$+ price on a 150000$+ harvester head, but not on a low budget firewood processor...

Have you ever thought?? about the option to use the return stroke from the splitter to feed the log forward into the saw cut position.....using a reverse pivoting linkage....and that way save from using another another function (feed motor)....

Together with a up sized gas chainsaw, you would have a low cost, fully functional processor operated with one single spool valve....

..."make it simple is a challenge too..." and will save 1000$+ in hydraulic hardware...