I'm beating a tool-height probe switch into submission and want to make sure I'm not misinterpreting what I see; the relevant sections of the EMC2 version 2.3 doc are not entirely forthcoming.
Here's how I think the pieces work... The coordinates stored by G30.1 in #5181-#5186 are always in native machine units, which are inches for my Sherline's 20- tpi leadscrews. Thus, to program a Z-axis move to the G30 height while using metric units, you'd use G0 Z[#5183 * 25.4] The tool dimensions stored in the classic tool table file are always in native machine units: inches for my machine. Thus, the tool lengths used by G43 H- (read from the table) will be in inches. The coordinates stored by G38.2 in #5061-#5069 are in whatever units the currently active G20/G21 mode calls for. Thus, with G21 metric units active, #5063 has the most recently probed Z-axis coordinate in millimeters. The tool length used by G43.1 K- is also in the current G20/G21 units, which will be millimeters when G21 is active. So, with G21 active, doing a G38.2 probe stores coordinates in millimeters, which are exactly what's needed for the subsequent G43.1 K- G43.1 K[#5063 - #<_ToolRefZ>] That's the way it seems to work and it makes perfect sense, although the collision of units in the G43 family was disconcerting. Do I have all that right? Now, is there any way for a G-Code (sub)program to determine which of G20/G21 is currently in effect? It Would Be Nice If the routine could pick its Z traverse level and probing speed based on the current units. Thanks... -- Ed ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
