https://forge.codesys.com/forge/talk/Runtime/thread/31f9bd7c70/2020-02-27T17:50:13.117000ZRecent posts to Connect Process C++ opencv app with BBB codesys2020-02-27T17:50:13.117000Z2020-02-27T17:50:13.117000Zmassissam1https://forge.codesys.com/u/massissam1/https://forge.codesys.com86fcd4509ff441e7358c8f851186574375eaf16c

<div class="markdown_content"><p>Hello Josep<br/> I think I have understood a little bit your systems, you use a "direct transfer model" <br/> cylinder + high presure pump(fix displacement) + Servomotor?</p> <p>I have studies this systems instead the conventional (powerunit + ServoValve + Cylinder). <br/> I found very high efficency in power consumtion, but I have not sufficent confident for this project.<br/> and also economical side in term of investment I have seen not really ceaper in comparison to the conventional systems.<br/> So I decided to do the current project in normal way.</p> <p>In Any case stay in contact!!</p> <p>Best regards<br/> Massimiliano Rovinelli</p></div>

2020-02-27T17:50:12.078000Z2020-02-27T17:50:12.078000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com2103211af65f689ec411d8f1fbe198acb298711c

<div class="markdown_content"><p>Hi Massimiliano.</p> <p>I have a polinomical trajectory generator working like plcopen motion.</p> <p>In hydraulic system, my system goal is to not use proporttional valves. I have tested it with good results in position control but witth small pumps (13cc/rev) and 100 bar.</p></div>

2020-02-27T17:50:09.148000Z2020-02-27T17:50:09.148000Zmassissam1https://forge.codesys.com/u/massissam1/https://forge.codesys.com0abf55357110a5b6c75a584c8b43bf1ced325676

<div class="markdown_content"><p>Hello Josep<br/> very interesting application, it could be interesting to exchange experience but for what I see you are in front of me.<br/> At the moment my HMI is in second priority and also the possibility to use OPC sdk.<br/> At the moment I have seen the possiblity to use OPC server in BBB, but never done a test. Do you know where is possible to find client server examples?</p> <p>Regarding my hydraulic application.<br/> At the moment I'm concentrate to the trajectory generator.<br/> I'm using linear segment profile for the trajectory, with some smuthing function in the change of the speed.<br/> regarding PID, or better PI + feedforward, I used a modifyed OSCAT implementation.<br/> modified becouse I need to consider the actual force of the hydraulic axis, and I need two switch from position to force control in some condition.</p> <p>The power source it works in two pressure with accumulators, low pressure , and high pressure.<br/> The HPU is an indipendent systems not connected with the press.<br/> The pumps/motors only have the task to maintain the two level of pressure in the specification.</p> <p>The machine switch in high pressure in some situation and back in low pressure in other situation.</p> <p>If you think that this kind of application is similar to yours I think we can exchange info and experiences.</p> <p>BR</p> <p>Massimiliano</p></div>

2020-02-27T17:50:08.076000Z2020-02-27T17:50:08.076000Zmassissam1https://forge.codesys.com/u/massissam1/https://forge.codesys.comf9ff3749f9653151b801a2a8de5beecf12983d19

<div class="markdown_content"><p>Hello Kumar<br/> I use the attached one. It has ethernet to USB and 3 additional USB ports.<br/> It works only in USB 2.0 with BBB<br/> It seem that debiam recongnize it without any strange update, and it works with Preempt-rt also.</p> <p>BR<br/> Massimiliano Rovinelli</p> <p><img alt="IMG: BBB " rel="nofollow" src="https://forum.codesys.com//download/file.php?id=2979"/></p></div>

2020-02-27T17:50:04.964000Z2020-02-27T17:50:04.964000Zmassissam1https://forge.codesys.com/u/massissam1/https://forge.codesys.com8cf3a6b1a8b94a7f1582e54b42fa59b3c5bf817a

<div class="markdown_content"><p>Hello Josep</p> <p>I used rt-test benchamrk at first and latency test on 10 proces with RT request, after 2-3 days contiunous running have a max value of 150us.</p> <p>In the codesys task analisys tools, it depends about how you configure the tasks.<br/> jitter from 20us to 100us</p> <p>BR<br/> Massimiliano</p> <p><img alt="IMG: BBB " rel="nofollow" src="https://forum.codesys.com//download/file.php?id=2978"/></p></div>

2020-02-27T17:50:03.916000Z2020-02-27T17:50:03.916000Zkumareasuhttps://forge.codesys.com/u/kumareasu/https://forge.codesys.com7dc61860840156eb68922bc173420730226adfe3

<div class="markdown_content"><p>Dear Massimiliano,<br/> I am searching for USB to Ethernet converter which can work with BBB(loaded with Debian ). I am not able locate one, any idea from your experiance. <br/> Because I want to use another BBB or RPI for HMI, the connection through ethernet.<br/> regards,<br/> Kumar.E</p></div>

2020-02-27T17:50:00.978000Z2020-02-27T17:50:00.978000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com1d8f657e87c8f1de0e7278a7f16a490b564996ec

<div class="markdown_content"><p>Hi Massimiliano.</p> <p>I am interested in your real time tests with BBB.</p> <p>I am developing a wrapper over an opc sdk client and I have developed an hydraulic control system based in the pump speed which can works i 4 quadrants.</p> <p>If you like we can interchange experiences.</p></div>

2020-02-27T17:49:59.941000Z2020-02-27T17:49:59.941000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com6c8bbaddaa188d68d17382c599cc77632942561e

<div class="markdown_content"><p>Hi.</p> <p>How much jitter is in Bbb with preemt kernel?</p> <p>Thanks</p></div>

2020-02-27T17:49:58.896000Z2020-02-27T17:49:58.896000Zmassissam1https://forge.codesys.com/u/massissam1/https://forge.codesys.com17fdc0bca076a9d4300c63ea79a43ba352c24219

<div class="markdown_content"><p>Hello Kumar<br/> 1) At the moment 1 hydraulic axis<br/> 2) At the moment due to my time was short, I use Battery under power supply, our company works 24h/day 7days on week =&gt; never shut down til now the "uptime" command give me 104dd.<br/> 3) Not at the moment I use webVisu, I'm testing some comunication with shear memory and C++ app, but at the moment have priority two. Is the OPCserver aviable for Beagle?</p> <p>Best regards</p> <p>Massimiliano</p></div>

2020-02-27T17:49:55.963000Z2020-02-27T17:49:55.963000Zkumareasuhttps://forge.codesys.com/u/kumareasu/https://forge.codesys.comb7bd433f43820d1f1a4c65cea262b6fb660f2678

<div class="markdown_content"><p>Dear Massimiliano,<br/> Thanks for your reply...Very much useful. I have few more aspects to discuss...<br/> 1. How many axis you have done with BBB.<br/> 2. Do you have any arrangement for safe shutdown of BBB like UPS .(I have frequent power interupption).<br/> 3. Did you use OPC server in BBB? and read/write the value from your HMI?<br/> Regards,<br/> Kumar.E</p></div>