> part of this implementation is Tool [torch] Height Control - i have > ultrasonic sensor that i would like to use for nozzle height control. > Datasheet of the sensor is here: > http://info.bannersalesforce.com/xpedio/groups/public/documents/literature/110738.pdf > > i have searched for more information on THC implementation and what > confuses me is that it seems like i would need some additional > hardware as described here: > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Torch_Height_Control > > the question is - is there a way to set THC in a way that EMC2 > acquires data directly from sensor and adjusts Z axis height as > required (at least at the beginning of executing file for 5 axis code > and preferrably floating Z axis for 2 axis code. creating 2 separate > machine profiles - 2 axis and 5 axis - is acceptable)? without > additional boards and hardware as i do not understand, what is their > purpose. > >
If you dig into the Hal portion of EMC2 and also dig into the ladder logic you will see that there is a lot that can be done to drive the torch height control. I have done a program in a PLC to control torch height by taking in a position via an analog input and driving a stepper motor either up or down to maintain a distance as the torch traveled. I believe that EMC2 has everything required. The stepgen stepper output generator, the ability to get the analog voltage in via a analog to freq converter, and the logic required to drive the stepgen - stepper control block. On top of that there is ladder logic available if the logic can't be easily implemented in Hal. I've not tried the new THC control but that was really setup for plasma use and I don't know how that would work for you with a waterjet. Do you think you will have any issues with the ultrasonic sensor and the water mist from the waterjet? I was to work on a waterjet system next week but the project has been delayed. That machine has a constant mist/cloud of water vapor around it. 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
