2012/1/27 gene heskett <ghesk...@wdtv.com>: > > That depends. Can, if you just short your device, burn wood? If not, or > only very much slower than you expected, then the wire is too small.
I could. Now it seems that my diy stopped working again - laser receives ~3V DC regardless of the state of gpio output pin. I give up trying to get it working. > However, this gives me another better idea, that of putting your DIY > switching device right at the laser, essentially doing away with the wiring > losses, and use the existing small wire going to it for the logic signal to > control it. > > That seems like the most serviceable solution to me, quit trying to send > the amps up and down a small wire, just send the controlling signal. I am > assuming that the relatively small currents your DIY needs can be supplied > by the lasers own supply, removing the need to also send your DIY a pair of > power leads of its own. Thanks, sounds like a pretty good idea. Its only downside - I cannot implement it on the spot at client's site, because I have to redo my diy - it is on the same piece of pcb with 7 input optoisolators for home, limits and e-stop. 2012/1/27 gene heskett <ghesk...@wdtv.com>: > On Friday, January 27, 2012 01:50:53 PM Kirk Wallace did opine: > >> I suspect the power to the laser driver just needs to be switched as an >> Enable, with the driver's TTL input modulated by PWM/PDM to turn the >> bean on and control the strength. >> >> I have zero experience with lasers, so grains of salt are recommended. > > And I suspect you are spot on, and that we have managed to make a larger > problem out of it than it is. > As I wrote - there are only 2 connection terminals for laser board, labeled "+" and "-" Viesturs ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
