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General Forestry => Sawmills and Milling => Topic started by: Ed D on June 08, 2022, 04:47:44 PM

Title: how to install a hydraulic valve in existing circuit?
Post by: Ed D on June 08, 2022, 04:47:44 PM

I would like to install a double acting hydraulic valve to actuate a hydraulic cylinder that will control the existing manual lever that actuates the moveable blade on a baker edger.
I am at a loss to determine how to plumb the hydraulic circuit along with the standard push-pull selector and the flow control valve to the conveyor.  ???
Thanks for any help from the hydraulic guru's! 
Ed


(https://forestryforum.com/gallery/albums/userpics/48890/Hydraulic_Lines.jpg?easyrotate_cache=1654710405)
 
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: Southside on June 08, 2022, 06:29:43 PM
My brothers wife's sister is married to an electrical engineer at a hydraulic shop. He said tomorrow he will check with lead installer whos son is dating a girl that might know the answer to what it is you are asking us.  :D
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: Don P on June 08, 2022, 06:45:40 PM
You're trying to adjust a lever using a cylinder? If so I don't think that'll be precise enough. There is an EF, Excess Flow port on the flow control valve. 
Catalog Cover & Back 2013_PCG.indd (baileyhydraulics.com) (https://www.baileyhydraulics.com/pdf/ValvesRd100.pdf)
 
I'm wondering if an electric linear actuator would work.
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: fluidpowerpro on June 08, 2022, 06:50:23 PM
I can help you. Do you have a hydraulic schematic for the machine as it is now.
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: customsawyer on June 09, 2022, 04:19:01 AM
Call Baker. They probably know what you are wanting to do and know how to do it.
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: Ed D on June 09, 2022, 06:44:16 AM
Thank you all for your efforts and replies!!  :)

FPP - I do not have a hydraulic schematic :'(
The two valves shown control the entire circuit. 
The pink line into the flow control valve (prince RD 100 series) is from the pump.
The orange line is to the two conveyor motors (1 "in" and 1 "out" conveyor motors)
The red line is return to tank which is connected to a "T" at the push-pull selector valve.

Right side of edger showing the two conveyor motors and the pump below the left motor.


(https://forestryforum.com/gallery/albums/userpics/48890/Hyd_Pump_and_Motors.jpg?easyrotate_cache=1654770069)
 

I estimate that the lever I want to actuate will have to move about 6-1/2 inches. 
I suppose there should be a flow control on any valve that actuate that lever (so it is not fast or jerky)
Thank you for any ideas or suggestions!!
Ed
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: beenthere on June 09, 2022, 11:51:36 AM
per DonP
QuoteI'm wondering if an electric linear actuator would work.

Thinking the same.. if 12v power is available.  Move slow, can pick the stroke and the force needed.

https://www.surpluscenter.com/Linear-Actuators/DC-Linear-Actuators/
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: Ed D on August 16, 2022, 05:42:08 PM
Hi All,
Success with the modification to a Baker Edger by adding a hydraulic action to the secondary blade and also adding lasers to it.




(https://forestryforum.com/gallery/albums/userpics/48890/Hydraulic_-_Lasers_1~0.jpg?easyrotate_cache=1660685957)
Hydraulic valving - new controller valve on the right


(https://forestryforum.com/gallery/albums/userpics/48890/Hydraulic_-_Lasers_3~0.jpg?easyrotate_cache=1660685958)
 Cylinder and Lasers activation

A BIG THANK YOU to @fluidpowerpro (https://forestryforum.com/board/index.php?action=profile;u=55416) for his design and suggestions, without which we would still be fumbling around.

Thank you Tom!

Ed
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: fluidpowerpro on August 16, 2022, 09:45:01 PM
Looks great Ed. Glad I could help.
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: arthurjohnston on January 14, 2025, 10:15:03 AM
Honestly, if the lead installer's son's girlfriend can solve this mystery, I'll be impressed. Jokes aside, it's always good to have someone in the hydraulics field to consult. Let us know what they say!
Title: Re: how to install a hydraulic valve in existing circuit?
Post by: jimbaker16 on January 16, 2025, 09:18:38 AM
Quote from: Don P on June 08, 2022, 06:45:40 PMYou're trying to adjust a lever using a cylinder? If so I don't think that'll be precise enough. There is an EF, Excess Flow port on the flow control valve.
Catalog Cover & Back 2013_PCG.indd (baileyhydraulics.com) (https://www.baileyhydraulics.com/pdf/ValvesRd100.pdf)
 
I'm wondering if an electric linear actuator would work.
I think that's a solid suggestion, especially if precision is key. A hydraulic cylinder might do the job, but controlling its speed and movement could get tricky without the right valves and controls. Have you had experience setting up electric actuators for something similar?