New EcoSaw Hydrostatic Model!

DnLTechGeek · December 10, 2005, 09:19:51 PM

It may be cold up here but things are really heating up as we unveil our new EcoSaw Hydrostatic Model. Here are some pics.

doublecut · December 11, 2005, 11:21:59 AM

Well it was a while in coming but the New Hydrostatic model is here. We have tested it throughly now and it has performed wonderfully . Totally different from the other mills we have built. So quiet , we tested it right in the shop and left the power pack out side. It really has some unique features. So far it has compared to the 31H.p Model we currently manufacture. So lots of power .The Cradle it self only ways 60 pounds.
HAve tried it in full 8" cuts in frozen wood and no problem no bounce. It is quite a nice alternative to the gas version .
The first pic to the left is is on the back cut
next to that is Smoothness of the cut
to that is the cradle parked at the operator station
Bottom left is the cradle from where the operator is standing
and next to that is the power pack.
The power pack actually is loaded on to a trailer and the mill around that
doublecut

DanG · December 11, 2005, 11:41:42 AM

Oh, I unnerstand now. You're using a hydraulic motor to run the saw. When I first saw this last night, I was getting really sleepy. I thought you were talking about adding power feed to a mill with a gas engine. :

:P

Can you give us some particulars on the power pack and motor? Flow rate?

doublecut · December 11, 2005, 12:38:16 PM

Hey Dang.
I haven't got thos specs right on hand but will get them for ya.The one thing we needed to have at least 30h.p to run the pump. We are also setting it up to run off of a tractor as well. So hook 'er into the farm tractor and away you go. The smoothness and quiet is what i liked the most. Running it in doors in our weather we have right now was the other noticable feature i liked. With no vibration it really made the saw perform quite a bit better in the cut. The texture was really smooth and accurate.
doublecut 8) 8)

D._Frederick · December 11, 2005, 06:13:31 PM

I likewise thought that you were talking about a carriage drive, a hydrostatic system is used for variable speed systems.

If you are running a pump with a 30hp engine, what are you doing to cool the hydraulic oil? It will get very hot in a system under contant high pressure.

Tom · December 11, 2005, 08:41:57 PM

He's probably backed up to it to keep his Bo-hunkus warm, "D". :D

He lives all the way up there on the left side of Canada. :D :D

doublecut · December 11, 2005, 08:44:17 PM

Hi D._Frederick
We have installed a oil cooler in line with a automatic thermostatic fan to control the heat.It s all built into the power pack. But the system is not under constant pressure only when it is cutting in the log. So about 75% in constant pressure . We have run it in the building and so far the heat has not been a factor. We really have to work it to get the heat up to get the fan to kick in on the cooler. And that only happened once. We have installed the coolers as these ones are heading to south america and as we know that it gets pretty hot there . So it is in there to maintain the heat where every the mills end up.
Good question thanks for the feed back
doublecut

doublecut · December 11, 2005, 08:48:12 PM

Hey Tom.
Yeah and it works really good for that too. Must admitt. Everyone keeps asking if the white balance is out on our camera . NO that is snow. We love the winters. Will send some pics of our 7500 ft snowmobile adventures
adventures
doublecut

woodbowl · December 11, 2005, 10:40:12 PM

Lindsey, that's got to be quite a difference from the top motor drive. I know it's got to be light, quite and smooth. Sounds like you have plenty of power too. Is there a noticable difference in the motor drive / hydraulic drive transfer? What other advantages are there?

Husband · December 12, 2005, 01:23:06 AM

Hi there Lindsey.
Hey we built quite a few hydraulic mills ourselves a few years back now.
People loved them for their smooth cut, constant horsepower, and yes, quiet features when they set up the main unit "hidden" in another room. ;D
Something for you to be aware of (you most likely know already) - make sure that if you "plug" into the tractor hydraulics, that the return line can handle the volume that you are putting back into it. We tried a tractor (100k worth) and found the back pressure to be too much, and we kept on blowing the seals and top hats. >:(
What brand of hydraulic motor are you using and what cc if you dont mind me asking?
If I can help in any way just give me a call or E-mail; I have over the years learnt by my mistakes...and others when they tell me - this has saved me $$ and time. ;)
It looks great any how, keep up the good work and keep them photos coming. 8)
Husband.

ScottAR · December 12, 2005, 03:02:23 AM

I'm guessing this thing has power feed and tilt/swing?
Ball park price? With engine or with pto?
I like the idea of backing up a tractor pto to the mill shed and leaving the noise outside.
I'd doubt running it stationary like that would be worse than field mowing for 3-5 hours...

doublecut · December 12, 2005, 10:55:51 AM

Thanks for all the feed back.
Husband
-We are using a bosch rexroth motor . HAve thought of the tractor issue already but thanks anyhow. We have tested it quite extensively . But i sold our tractor so need to buy another one to finish our testing . We are also working with skid steer auxilary hydraulics as well.

ScottAR .
-This is still a manual feed and manual tilt on the swing. Will get price for you soon.
Thanks for all the feed back .Much appreciated.Keep it coming
We will be posting it up on our sponsors page today
doublecut

doublecut · December 12, 2005, 12:27:08 PM

Quote from: woodbowl on December 11, 2005, 10:40:12 PM
Lindsey, that's got to be quite a difference from the top motor drive. I know it's got to be light, quite and smooth. Sounds like you have plenty of power too. Is there a noticable difference in the motor drive / hydraulic drive transfer? What other advantages are there?

There is a big difference in the motor drive for sure. As i have mentioned the quiet less vibration and leaves a smoother cut.
Running it in side of a building as well . You now have a hydraulic power pack to run other tools implements ,log decks . Log splitters, ect off of. So it becomes multi purpose. We are now building a trailer that the power pack sits on and the mill loads on it and can be driven with the power pack from log to log or site to site. Off highway of course.
doublecut

aom · December 12, 2005, 01:17:22 PM

Doublecut
Would I be correct in saying that the hydraulic idea is similar to the trekkasaw, where you depress the trigger, do the cut, release trigger, saw stops, adjust saw and repeat etc. I guess it hasincreased safety implecations in that the blade is not constantly running. Trekkasaw is a wide b/saw system, but yours is circular saw. Several points as I've run a variety of mills over the years. With a swing mill generally it runs at full blast[although I know of some that have installed motorbike throttle cables and throttles] would the acceleration and deacceleration disrupt the work flow, as production works differently on a b/saw compared with a swing mill. Likewise the rapid and much more regular accelaration/deacceleration, would this increase the need for doctering the sawblades.
With regard to driving such a mill from a tractor, a simple system used on the trekkasaw, is a pto driven hydraulic pump with tank on the three point linkage which is started by a solenoid operated by a trigger on the saw head I know these mills have been operating in the tropics and other difficult areas with good success. They used to use a cazzappa alloy[lighter] hydraulic motor, but although using a 4"wide band capable of a 39"cut, they nevertheless ran much slower than a circular, so I guess different problems to overcome
aom

doublecut · December 12, 2005, 03:43:44 PM

We have a on/off lever right on the cradle at the operators finger tips. So if the operator chooses they can shut the blade down and the blade comes to a coasting stop. The mill is still as safe as the gas version. Probably a little more so.
The tractor idea i have thought of and it kinda depletes the purpose of try to use the tractors aux hydrualics that are already there. The cost of the mill will be less expensive if we are to run it off just the tractor .
doublecut

D._Frederick · December 12, 2005, 05:12:18 PM

Most small to medium size tractors don't have enough flow rate to run a 30hp hydraulic motor.

doublecut · December 12, 2005, 05:28:12 PM

Yes i agree . We need 10 gals a minute at 3500psi.
doublecut

slowzuki · December 13, 2005, 08:47:59 AM

Many PTO pumps are available that can do that without as much trouble with return flows. I know my kubota can put out 9.9 gpm or something at the remote but it would heat up quick.

Dangerous_Dan · December 13, 2005, 09:27:25 AM

What is the rpm and feet per minute of the blade? ???

doublecut · December 13, 2005, 10:24:41 AM

Rpm of the blade is 2700 and cutting speed throught the log is 1ft per 1.5 seconds in a 6 inch cut
doublecut

dudders · August 26, 2020, 11:43:42 AM

It strikes me it would be better to have a reservoir for the oil, with the tractor (or power pack) just turning a pump, rather than having to provide the oil as well. This would also provide all the cooling you'd need, as the hot oil would return to the tank to be cooled. More weight and more oil, but no cooling rad or fan and any size tractor would do.