Eric H. Johnson wrote: > Jon, > > I am using the coordinate systems as a means of getting multiple tools > offset in X and Y from each other so they can land on top of each other. > IOW, do a pass with one tool, then apply the offsets of another tool but > otherwise follow the same tool path. I thought the G41/42 radius offsets and G43 tool length offsets were used for this purpose. > For example: > > G54 - Null Tool > G55 - Basically a Stylus (no tangential axis) > G56 - Tangential tool #1 > G57 - Tangential tool #2 > > There are also home, sharpen and out of the way positions which are > absolute, and these are the positions using machine coordinates, i.e. using > commands of the form > G53 G0 X0 Y0 > or > G54 G0 X0 Y0 > > Also the initial start point is generally set with machine absolute > positions, so as not to be confused by the tool offset in effect. When the > pattern is run, a G92 X0 Y0 is issued prior to a G54-G57, and even if the > current location is absolute machine 0. > > I can understand the offsets (G54-57) getting cleared, etc. on a stop, but I > do not understand why I cannot re-establish them with another G10 L2 ... > > These offsets can be CUMULATIVE in some situations. I have to admit I don't REALLY understand all the implications of G92 L2 Px, I have had hours of hair-pulling trying to use this in cases where I wanted to use a small program to repeat the same operation at a number of positions with, say, an incrementing X offset.
Anyway, the G10 L2 Px adds an offset from the CURRENT machine position, so unless you are at the same point when you do it, it will produce a different offset. > Additionally, I am running a headless system with my own user interface, so > I am not using Axis. The section of the manual you reference is exactly what > I was working from. > OK, then I think the G92.3 may be of help if you just want to put the old offset back. Otherwise, check the position you are at before using the G92 L2 Px. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
