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Hydraulics experts please help

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shipto:
For my next project I want to make a hydraulic powered press similar concept to a Ironworker and making one that will go up and down with a valve should be simple however I would like a semi automatic if possible.
I want to be able to control firstly the up and down manually so I can get whatever tooling set up but once I have it set up I would like to set a pressure and have it return to the start once that pressure is reached.
I have available:
A bank of 3 way valves which I am sure can be split, 2 hydraulic pumps one with electric motor and one fitted to a lister diesel engine, oil tank one single acting ram and 3 double acting rams 2 of which would be a good pair to use for the project and various bits of piping.
electric one is a full built in unit off a raising platform so probably has a pressure limit valve and 3 way valve included will have to look at it closely but its under a pile of other jun... I mean equipment at the moment.
I have done a few searches but am having problems finding the way it is done on the off the shelf presses etc if anyone could point me in the right direction it would be appreciated.

Sid_Vicious:
Keith Fenner made his own press and have some videos of it on youtube. Maybe you could get some ideas from how he did it.

PK:
Stay tuned to the How Do I section. I'm building one at the moment that sounds pretty close to your spec. I just have one problem to solve so I'll be putting pics up in a few days. But I reckon I've nailed the hydraulic aspect of it (from a home workshop perspective)..
PK

shipto:
Thanks both I will certainly look out for your new thread PK and have started to watch the Keith Fenner video's.
dragged the power pack out today was expecting a double ended solonoid but it only has solonoid on side I guess the only way to find out how it works is to put a ram on it and try it. I did search and found packs like it but not the same.

David Jupp:
The nice thing about a manual valve for the hydraulics is that it keeps one hand out of the danger area, and the hand on the valve is ready to stop things at any moment if things begin to go wrong.

If introducing any automation, think carefully about how best to protect the operator from conflicting with any automated movements.

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