Hydraulic SYM

hello
the hydraulic positioners/encoders/transducers are BTL5-A11-M0450-P-KA05 by micropulse.

from what i can gather they output 0-10 depending on the position they are... is this accurate?

If so, how do that information gets fed into the Arduino board so SimTools can work with this info?

Finally, is the Arduino the absolute best interface to use, or is there other alternatives that are better?

Thanks for your help...

And yet another expert needed question..

Since the controller that came in with the simulator is kaput, I am going to have to control the valves manually and read the encoders (no problem there)

My question is...''what happens if I switch on a valve whilst the pump is working and don't switch it off when the actuator reaches it's maximum??

Will it go into effort and risk bursting the pipework or do hydraulic actuators have safety features Built in for this not to happen?

Any light shed here is much appreciated.,.

Cheerio

I'm not an expert for hydraulics but for pneumatics, but that's somewhere similar.

Here are two links to PDF's about hydraulic-basics but you will find many more with google.

http://yuken-usa.com/pdf/special/Basic_Hydraulic_And_Components_(Pub._ES-100-2)_.pdf
https://azwardiir.files.wordpress.com/2010/06/apltcl025_sgd_l-01-hydraulic-fundamental2.pdf

Usually there is a pressure limiting valve in such a system to prevent damage.
Also you should first find out which type of valves there are to move the actuators. It should be 3 valves with two electric coils each. (one for each direction).
The valves should have 3 positions internally (one direction - stop - other direction). If so, you can savely give short impulses to the electric coils while the pump is working, because the valves will return back to the neutral position without voltage. Its like the joystick in an excavator.

The transducers have according to the data sheet a measure length of only 150mm. If the range of the actuators is more than 150mm(that's what i believe), you can monitor only a part of the actuators movement.
The analog output (0-10V) from the transducers can be connected to the arduino via a voltage divider.
You can use the SMC3 software to control the valves. The only change to this program would be a reduction of the PWM frequencies to i think max 10Hz, so the electric coils will have the possibility to follow.
Yes, an arduino uno should be the best solution for this project.

Sorry if i write a bit long-winded, but that's not my native language.

Thank you so much for all this info

I am very much appreciated as this was exactly what I was thinking however wanted someone else's input before starting to play with it...

I think the travel on the actuators is approx 450mm.

I will know for sure on the next couple weeks

I will need some help with the aurduino interface...

I have some micro controllers I use for minimal automation projects (Schneider Zelio)

These are very smart PLC relays with logic built in and can read analog inputs (0-10v)

It can also read serial instructions and trigger commands

Would it be a good idea to have reacting to serial data being sent from simtools??

Attached is a picture of the encoders on the sim


Your English is amazing... ;-)

Apologies as I induced you in error

The encoders on the machine are

BTL5-A11-M0450-P-KA05

Yes, i have just seen the picture.
That's good, one worry less.
Let me think a while about your micro controllers.

Great information @Bernd Manger ...

IMHO he has a driver for those valves that takes care of its Amps. and the incoming PWM from the controller ...



Please @Marco Dias ... We need pictures for all components [All of them please] : valves, controllers, contactors, pistons, oil tank+safety gages ...
Every thing please so we can evaluate How/What's it gonna be ?

That would be very helpful, but please insert them to your posts as thumbnails. I have a slow internet connection, so i have to wait a long time if i open one of your threat's pages.
I'm concerned about whether the converter you ordered matches to your motor. Could you please post a link to it and take a picture of the motors type plate.

Helol

Thanks for this.

I will do..
Once I am back on the warehouse I can take a load of pictures..
Question...

If an hydraulic system opens/closes valves to make an actuator go backwards/forwards, how does it control the speed that the actuator moves?

Obviously the sim will have to move at different speeds depending on the scene it's replicating right?

In reply to your question about controller matching the motor, I don't think that makes a difference.

There is no control of the motor.

This system looks to be designed so the motor works automatically when it needs the pressure...

It connects directly to the mains and there is a pressure gauge which I am assuming that measures the pressure in the tank, so when it drops the motor kicks in...


I didn't 't order any controllers for this project yet.
If you referring to the Schneider Zelio micro controller/plc/smart relay unit I mentioned above, I have a bunch of those already for other applications I use them for.

Cheerio
M

Oh, you misunderstood my question. I wrote about the 1 phase to 3 converter.

I don't believe this, i think the motor runs all the time and the pressure gauge shows that there is enough pressure after the oil pump and gives a contact to the controller board. The oil tank is pressureless with an open drilling to the atmosphere.

That depend on the type of the hydraulic valves:
The first type switches only on/off, with them you can control the speed only by switching them on/off rapidly with longer or shorter pulses (PWM) at per example 10Hz. That results in a stuttering movement at lower speeds.
The other type are analog- or so called servo-valves. They allow the oil quantity(=speed) to be regulated infinitely. But they are very expensive.
So you first have to find out which types there are in your sim.

Cool..

Thanks for this...

Converter is 11Kw and motor is 5.5kw.. hopefully will do the job.

You probably right ref pump.. it makes sense to be always working otherwise the motor starting and stopping would create huge in-rush current...

Will check valves.. hopefully they the very expensive ones... if they not I will research cost and see if I can afford to change.

I want it to have smooth movements as well as fast ones...

The following YouTube video shows one working...

Would you say by looking at it working that these are flow control valves running it?..

Doesn't seem to stutter and looks as it has slow and fast response movements going on there...

you should be looking for such videos by now ...












As there are TONs of them for different parts of your system ... I just can't Identify which is helpful for you

Difficult to say, because there are mostly big movements with the same speed (= full speed ?).

But please, please make pictures of your sim's hardware !!! We are all waiting for them.

Looks as I am lucky and i have solenoid servo controlled valves...

DLHZO-TE-040-L53 40

I would say you've got the jackpot !

But i am missing something important in that warehouse:
Internet connection, your bed and refrigerator and a lot of beer. The reaction time to our "requests" (a lot of pictures) is definitely too long.

haha...

Trust me...it's freezing cold at the moment there.. I wish I could have it in my garage.. Far too big for that.
it was -2 Celsius this morning inside...

Now that we know what valves are these and that they the really good ones, it comes the question...

How on earth can I control them haha..

is it with a variable voltage like 0-10v??

I see some for sale on ebay almost the same as mine at 1500 each...

kinda expensive I have to say.... glad I already own them hahaha

Yes 24V power supply and +- 10V input signal.
Could you post links and/or model numbers from your Schneider Zelio controllers ?
Perhaps they are usable. I've worked with similar controllers from Siemens.