Hi Can i use USB to go directly into EMC2 architect and control feed or i need use some axis analog input? i want to be sure- you did control feed on emc2 with 0-5V DC power with use of USB ?
On Mon, May 12, 2014 at 11:18 AM, yann jautard <brico...@free.fr> wrote: > Or you can use an USB joypad and do some voltage conversion to feed the > 0-5v signal to one of the axis analog input. > i did that on my machine using an external potentiometer in place of the > on on the joypad, it work very well. And I'm pretty sure you can replace > the potentiometer with your 0-5V signal using some resistor to limit > current. > > > > Le 12/05/2014 19:47, andy pugh a écrit : > > On 12 May 2014 18:27, a k <pccncmach...@gmail.com> wrote: > >> hi > >> idea is to use 0 +5v to control/change feed in emc2 > >> 0v = 0 feed > >> 5v = 100% feed > > In that case you need to find a way to get 0-5V into LinuxCNC, then > > connect that to the motion.adaptive-feed pin (and issue the M52 > > command to turn adaptive feed on). > > > > Getting the 0-5V input in is the hardest part. You don't have any > > analogue inputs, only encoder (or GPIO) inputs. > > Does it have to be an analogue voltage input? It would be a lot easier > > to wire up a small encoder as the feed control. If you do need > > analogue, then you need a voltage-to-frequency circuit to feed an > > encode input, then you can use that encoder velocity as a proxy for > > the voltage. There are special ICs for this, or you could cobble > > something up with a 555 timer. > > http://www.circuitstoday.com/f-to-v-converter > > > > Or, possibly, a small electric motor spinning a ball-mouse encoder :-) > > > > > > ------------------------------------------------------------------------------ > "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE > Instantly run your Selenium tests across 300+ browser/OS combos. > Get unparalleled scalability from the best Selenium testing platform > available > Simple to use. Nothing to install. Get started now for free." > http://p.sf.net/sfu/SauceLabs > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
