On 06/01/2015 04:50 AM, andy pugh wrote: > On 1 June 2015 at 04:33, Sven Wesley <[email protected]> wrote: >> Trying to figure out if there's any way to run a motor, either a stepper or >> servo, a given distance with classic ladder _without_ having a XYZ >> configuration. > > > Yes, this is fairly easy. The stepgen and PID components don't care > where their setpoints come from. If the motors only need to run at one > speed you can simply set the stepgen max_speed and max_acc pins to the > required values. However typically you would use the limit3 HAL > component to supply position, velocity and acceleration limits for the > motor. > > Rather than CL I would consider making a simple Glade UI to supply the > setpoints and control the sequencing but if the controls are all > physical switches you could even run the PC without a display and > provide all operate feedback vial lamps and buttons.
This could be a start to a HAL controller: http://www.wallacecompany.com/machine_shop/LinuxCNC/gvcpDRO/ Just plug in the appropriate HAL components, such as LimitX and/or PID and others. The sequencing and logic can be done in Python. I used a similar setup (LimitX) except embedded in axis for my mill tool carousel: http://www.wallacecompany.com/machine_shop/Shizuoka/100_1136-1a.jpg http://www.wallacecompany.com/machine_shop/Shizuoka/100_1133-1a.JPG http://www.wallacecompany.com/machine_shop/Shizuoka/Carousel_Overview-1a.png I did some sequencing in an automated tester: http://wallacecompany.com/tmp/Screenshot_lathe_bd_test.png First pass: http://wallacecompany.com/tmp/auto_test_ui/ which used a comp similar to my lathe turret comp. http://www.wallacecompany.com/cnc_lathe/HNC/emc2/turret.comp > To set up such a "HAL-only" config you need a HAL file that starts the > threads and loads CL and/or a Python GUI. You don't need to load > motmod and there is no need for a G-code interpreter. > One difference between such a HAL-only config HAL file and a typical > one is that it needs to explicitly start the realtime threads with the > "start" command. > > You can then create an icon that runs halrun -f myhalfile.hal for easy > launching. > > loadrt threads period1=50000 period2=1000000 name1=base-thread > name2=servo-thread > loadrt stepgen step_type=0,0,0 > loadrt limit3 count=3 > addf stepgen.0.make-pulses base-thread > addf stepgen.0.capture-position servo-thread > ... > setp stepgen.0.step-length 4000 > ... > net limit3.0.out stepgen.0.position-cmd > setp limit3.0.min -100 > ... > loadrt classicladder ...... > .... > > start > -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
