On 2/17/2010 4:01 PM, Andy Pugh wrote: > On 17 February 2010 19:38, Viesturs Lācis<viesturs.la...@gmail.com> wrote: > > >> i have searched for more information on THC implementation and what >> confuses me is that it seems like i would need some additional >> hardware >> > EMC only really understands digital signals, that is the problem. The > sensors you show have analogue outputs. > There are a number of ways to get analogue signals into EMC, but they > all involve some form of signal conversion. The simplest is probably a > voltage-frequency convertor IC wired to one of your digital IO pins > and an Encoder in HAL set to Counter Mode. The encoder.velocity then > represents the value of your analogue voltage. > Alternatively you could use a PWM generator of some form. > > Another approach that I have not seen used yet would be to cannibalise > a USB gamepad and wire your sensor in the place of one of the analgue > joystick potentiometers. There is a lot of good info on the > linuxcnc.org wiki on interfacing gamepads with EMC2 > > There are also some ready made industrial analog to frequency converters on the market that clip onto a 35mm din rail and they are in the $100-$200 range.
Dave ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
