2012/1/28 Rafael Skodlar <[email protected]>: > > Of course that won't work with most if not all the suggestions I've seen > so far. If I understand it correctly, your "laser" already has a circuit > to drive it at reasonable current to do it's magic. > > Circuit I suggested earlier was under assumption you have a bare laser > diode connected to it. You cannot daisy chain circuits one after another > and expect laser to work properly. > > Relays are out of question IMO because they are too slow mechanical > devices with many other drawbacks for this application. I see no reason > to bring in solid state relays into the picture either. You are not > driving high voltage stuff. > > You either need to modify your PCB that came with the laser diode or > build a new circuit. Maybe you can reverse engineer that PCB and use one > spot to inject signal from the EMC side.
Ed, Kirk, Rafael, thank You! Given my lack of skills in electronics, I think that interfering and modifying the pcb that comes with laser is the last thing I want to do. Here are some pics of the laser and its pcb I took late in last night with my phone (it was late enough that I forgot to upload them yesterday evening): http://picpaste.com/2012-01-27_21.54.59-QzJqS24n.jpg http://picpaste.com/2012-01-27_21.55.16-mx4U2GiU.jpg http://picpaste.com/2012-01-27_21.55.36-wtANcKHw.jpg http://picpaste.com/2012-01-27_21.56.28-ySpITI8d.jpg I think that I will try the "use a relay" approach, because: 1) it is simple enough for me to do it; 2) it does not require modifying existing laser's board; 3) it will be fast enough for me, because I am going to use the laser in a "a la milling" fashion - move laser along the line to be burned instead of moving it back and forth and switching it on, when necessary, because: a) the laser is weak, so by definition it can't burn quickly; b) machine is heavy and relatively slow, compared to "normal" laser engravers, so it would not be able to handle very powerful laser anyway; c) g-code generation - I have no idea, how to generate g-code for "normal" laser engraving, but I know, how to do it for "a la milling" style. BTW client was happy, when he saw the first hand-burned lines in the wood that I managed to do last night in that small moment, when the laser was working... 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
