On 04/16/2014 07:51 AM, Dr.Mclem wrote: > Dear users, > > I am retrofitting a small mill and want to create a manual mode as well as > the cnc mode but using the same hardware. I have jog wheels and analogue > handles already interfaced into Hal but have two problems I am struggling > with. > 1) on my count encoded wheel I want fine control (say 0.001") but as I spin > the wheel I would like the motion to be smooth. At the moment using axis-jog > it executes many 0.001 steps with a stop in between.
The ilowpass component can do this smoothing for you. Put it between the encoder of your jog wheel and the axis.*.jog-counts pins. We unfortunately don't have a good sample config that shows how to do this in simulation (ie, without special hardware hooked up). There's an example in the 'univpwm' sample config, look in the file named pendant.hal. Also check out shuttlexpress.hal, which does something similar (it's in the 'common' directory of the sample configs, and not used by any ini file that i know of). > 2) I would also like to use an analogue input to drive the velocity of an > axis directly for more rapid manual movement but can't see how to do this > with the jog pins. For this I recommend using halui. The jog speed would go into halui.jog-speed pin, and then the "go" buttons would be connected to halui.jog.*.plus and halui.jog.*.minus. For a pretty clear example of this, look at the halui_pyvcp sample config. The shuttlexpress.hal file also does variable-speed continuous jogging using the halui method. -- Sebastian Kuzminsky ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
