On 27 September 2013 03:04, Dave Cole linuxcncro...@gmail.com wrote:
http://en.revija-ventil.si/data/strokovni-clanki/17-2011-4/situm.pdf
They seem to be rather re-inventing the wheel.
Servo-hydraulic tension-compression fatigue testing machines are all
like that, and have been running
Nothing in that article is new other than possibly the use of a PLC for
that kind of control without the use of a specific card designed for
hydraulic control. Most PLC Hydraulic Servo controls setups require a
special hardware card to do what they are doing.. and usually it is
very
Stuart,
I was looking for something else entirely on the web and ran into this
by accident. This is very close to what you want to do.
http://en.revija-ventil.si/data/strokovni-clanki/17-2011-4/situm.pdf
I use a lot of S7-1200 PLCs but I think that all of this could be done
with LinuxCNC.
On 23 September 2013 03:50, Stuart Stevenson stus...@gmail.com wrote:
Gentlemen,
I want to control a hydraulic cylinder (extension and retraction) with
LinuxCNC.
I want to use an axial piston swash plate pump.
I want to control the swash plate with a servo motor.
This ought to work, but it
On Sun, Sep 22, 2013 at 10:50 PM, Stuart Stevenson stus...@gmail.com wrote:
Gentlemen,
I want to control a hydraulic cylinder (extension and retraction) with
LinuxCNC.
I want to use an axial piston swash plate pump.
I want to control the swash plate with a servo motor.
This method has been
I agree with Andy. I do quite a few industrial control jobs using
hydraulic servos.The normal setup is a swash plate pump that is self
pressure regulated feeding an accumulator (for pump efficiency and fast
response) and that feeds a
4 way servo valve or servo grade proportional valve.
The cylinders I want to control are 14 inch OD which I think would have
13.5 piston.
24 inch minimum stroke (maybe a little more)
1 1/2 pipe input on the rod side of the piston
2 inch pipe on the other side
I need it to extend out in about 10 seconds.
the leverage is 5 to 1 - 70/14 measured
On 23 September 2013 15:24, Dave Cole linuxcncro...@gmail.com wrote:
I'd keep an eye on Ebay for servo valves. Most people don't know what
to do with them.
http://www.ebay.com/itm/Actuator-hydraulic-flight-simulator-48-stroke-with-Moog-72-315-/15024528
All set up and ready to go. (and
On Mon, 2013-09-23 at 13:57 -0500, Stuart Stevenson wrote:
The cylinders I want to control are 14 inch OD which I think would have
13.5 piston.
24 inch minimum stroke (maybe a little more)
1 1/2 pipe input on the rod side of the piston
2 inch pipe on the other side
I need it to extend out in
2 cylinders - one on each end
500 ton 20' brake press
I need to control each end separately.
On Mon, Sep 23, 2013 at 2:32 PM, dave dengv...@charter.net wrote:
On Mon, 2013-09-23 at 13:57 -0500, Stuart Stevenson wrote:
The cylinders I want to control are 14 inch OD which I think would have
pic here - http://imagebin.org/271728
On Mon, Sep 23, 2013 at 2:50 PM, Stuart Stevenson stus...@gmail.com wrote:
2 cylinders - one on each end
500 ton 20' brake press
I need to control each end separately.
On Mon, Sep 23, 2013 at 2:32 PM, dave dengv...@charter.net wrote:
On Mon,
On 23 September 2013 20:50, Stuart Stevenson stus...@gmail.com wrote:
2 cylinders - one on each end
500 ton 20' brake press
I need to control each end separately.
I have a feeling that I have seen the machine?
The 20 ton testing machine I ran could do 36 inches per second running
with a Moog
On Sep 23, 2013 3:11 PM, andy pugh bodge...@gmail.com wrote:
On 23 September 2013 20:50, Stuart Stevenson stus...@gmail.com wrote:
2 cylinders - one on each end
500 ton 20' brake press
I need to control each end separately.
I have a feeling that I have seen the machine?
Your feeling
I just did the controls for a hydraulic press - a new machine that
swages 6 stainless steel anchors about 3/4 diameter at the same time.
It has an 8 cylinder on it and they are running about 2800 PSI system
pressure.
The press is quick as there is a 25 hp motor on it with a 10 gallon
On Mon, 9/23/13, andy pugh bodge...@gmail.com wrote:
Subject: Re: [Emc-users] hydraulic servo system
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Monday, September 23, 2013, 9:53 AM
On 23 September 2013 15:24, Dave Cole
linuxcncro...@gmail.com
wrote:
I'd
air bending mostly
Why would ram position not be sufficient for air bending?
Would tonnage be more important when coining?
I want to control both sides so I have the option of easily bending one end
more than the other.
On Mon, Sep 23, 2013 at 4:32 PM, Dave Cole linuxcncro...@gmail.com wrote:
Why would ram position not be sufficient for air bending?
I think that would work, but I would probably also want to know cylinder
pressure so I could set tonnage limits in an attempt to prevent breakage if
something goes wrong.
Decent pressure sensors are 2-$300 each. Cheap insurance
On 09/23/2013 06:01 AM, andy pugh wrote:
On 23 September 2013 03:50, Stuart Stevenson stus...@gmail.com wrote:
Gentlemen,
I want to control a hydraulic cylinder (extension and retraction) with
LinuxCNC.
I want to use an axial piston swash plate pump.
I want to control the swash plate with
Stuart Stevenson wrote:
Gentlemen,
I want to control a hydraulic cylinder (extension and retraction) with
LinuxCNC.
I want to use an axial piston swash plate pump.
I want to control the swash plate with a servo motor.
The null position on the pump may not be completely repeatable.
Also,
On Sun, 9/22/13, Stuart Stevenson stus...@gmail.com wrote:
Gentlemen,
I want to control a hydraulic cylinder (extension and
retraction) with
LinuxCNC.
I want to use an axial piston swash plate pump.
I want to control the swash plate with a servo motor.
I will install a linear scale for
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