Hi Ian, Chris told you most things except how to change the direction of the axis travel if that is wrong - this is done by changing the SCALE setting in the ini file from plus to minus........ It is also possible to change the direction the keyboard jog keys operate in but I've forgotten just how to do that ( I think it is done in a Halui file with a line like 'halui.jog.[axis number].minus' or plus but you'd need to consult the documentation for that to be sure ). You say that by convention 0,0 should be at the bottom left corner of the x-y axes which is correct but that is from the tool's point of view and, depending on your machine's configuration, the axes may have to move differently. i.e. if the toolhead is fixed and the axes both move, it will be different to the situation where the toolhead is actually carried by one axis as in a fixed gantry machine. So, as Chris said, the first thing to do is to make sure that the machine moves the tool from bottom left to top right with ascending positive values both when jogging from the keyboard and also when issuing g-code instructions through the MDI. When this is correct you can then mess about with the HOME_SEARCH_VEL sign to make the tool move towards the home switch. When this moves correctly, you can then sort out the HOME_LATCH_VEL and HOME_FINAL_VEL signs to get the movement directions you need. You will also need to check that HOME_OFFSET is correct so that the home position is clear of the limit switch. You can actually use this setting to advantage to make ini files for specific purposes. For instance, I have a set configuration for when I use my rotary axis as a 'C' axis which has the HOME_OFFSETs set so that the spindle homes to the exact centre of the rotary axis table.
Ian _____________________ Ian W. Wright Sheffield UK Ian R Upton wrote: > Gentlefolk and the other Ian, > > Read and re-read the .ini config documentation and notes on home settings. > > Changed the sign of parameters as suggested, no change in behavior. > > Thinking about it all I come to a much more fundamental problem with > regard to home. I will try and explain. > > Take the X and Y axis. Looking at the frame of the machine the X axis is > from left to right, the Y axis is bottom to top. > > By convention (established by Descartes?) the X0.0 should be on the left > and Y0.0 at the bottom. > > When I try and home the Y axis it heads off to the top some 300mmm away. > > So how do I tell Axis that Y 'home' is down at the bottom of the axis so > I can establish Y0.0 in the correct perspective???? Swap the connections > to the stepper? > > I cannot see anything in the literature about controlling the home > search direction. > > Any help/thoughts/suggestions appreciated. > > Ian. > > > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.830 / Virus Database: 271.1.1/2995 - Release Date: 07/10/10 > 20:59:00 > > ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
