On 9 March 2016 at 00:24, Gene Heskett <ghesk...@wdtv.com> wrote: > Just one problem, the limit box in the backplot says the tool tip is only > about 150 thou below the z axis upper limit!, and my code refuses to run > because it runs up 4" to a tool change height, which there are 3 of in > the code.. > > This does not make sense, the machine, when at the material top surface, > is almost 5" below the upper limit/home switch.
What I think has happened here is that you have filled the tool table with tool-lengths that are approximately the full travel of the machine (and negative) What numbers do you see in the tool table? That shouldn't be a problem, but you need to then set up the G54 offsets too to pull everything down again by touching-off to the work with a tool in the spindle and with the tool offsets (G43) enabled so that the system knows to factor the tool-length into the calculations. Starting with a blank canvas, you have a situation where Z=0 is at the top of machine travel. You then inserted a tool and jogged down several inches, and told the system that Z was now at zero. The system still thinks that Z=0 is at the top of machine travel, so the tool offset end up being negative (imagine a virtual tool pointing back up the spindle to the top home switch location :-) As long as the tool table is consistent, this is probably OK. But I prefer to work a slightly different way. I have my T99 which is a touch-probe. I have decided that that tool is of zero length. Every other tool has a Z-offset above or below that nominal zero. (On the lathe the reference tool is the turn/face T1). I know that both these tools should have zero offset, and if I mess up and put an offset in them then I can clear it with G10. If you had jogged a reference tool down to the PCB then touched-off the G54 to that position before touching-off the rest of the tools you would have ended up with a tool table of offsets relative to the reference tool, rather than referenced to the Z-axis home position. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
