The default behavior for arc distance is incremental so for a given arc you only have to change the start and end points to be correct.
For example with the center of the arc at X0 Y0 and a 0.510 diameter and starting at 180 and going CW to 90 the G code is: G0 X-0.2550 Y0.0000 G2 X0.0000 Y0.2550 I0.2550 J0.0000 If I move the center to X1 Y1 then the G code is: G0 X0.7450 Y1.0000 G2 X1.0000 Y1.2550 I0.2550 J0.0000 Notice that I and J remain the same and both the start point and the end points change by the difference in center locations. JT On 12/2/2014 4:18 PM, Gene Heskett wrote: > Greetings; > > I have generated a couple bits of g2 code to cut a 90 degree arc corner > > >From 180 to 90, with a .51000 diameter, arcbuddy spits out: > > G2 X0.0000 Y0.2550 I0.2550 J-0.0000 > > And from 90 to 0, same diameter it outputs: > > G2 X0.2550 Y0.0000 I-0.0000 J-0.2550 > > No tool comp is in use > > Tooldia and toolrad are defined as .255 and .255 /2 elsewhere > > x_tmp and y_tmp are defined and diddled elsewhere in the code. > > So, where do I plug these vars into the arcbuddy output you see above to > make it usable anyplace the table can reach just by adjusting the x_tmp > and y_tmp > But, I need this to be usable at anyplace along the x axis, with 2 > different y locations depending on whether the last move was X or the last > move was Y, all of which also contains what is supposed to be tool > diameter offsets in the I & J stuff. > > >From the above its obvious I can sub the Ioffset for I#<_tdia> in the > first example above and J-#<_tdia> in the second to make it self > compensating if I change the tools diameter, which will be used to control > the fit of the joints produced. But even that is not working. > > So, how does one go about plugging in his "offset" values in a G2 > statement above and make it work? > > I ought to be about ready for dinner, but Dee doesn't feel like going out > even if it is our 25th anniversary today. COPD never gets better. > Dammit. > > So I am working on this instead. > > Thanks & Cheers, Gene Heskett ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
