Hi
I'm doing my first piece in BobCad v21.5.3 and I'm not sure if there are better ways to do it.
The first picture is a rendering of the piece, actually doing 2 work pieces from one piece of stock. They are 5x3.5x1 on Nylon 6. The second picture has all the auxiliary lines I need still done in Autocad (easier to do them there because of osnap, etc.). The 3rd picture is the import on BobCad after I added the points to use for drilling (done using Point/Intersect on the imported construction lines).
So far I generated the G-code to drill the holes and now I'm working on the pockets. BTW the through holes are peck holes, just to give it a try and see if my mill does them.
Now, here it comes...Code:// small thru holes M5 M9 G0 G28 G91 Z0. T1 M6 S0 M3 G90 G54 X0. Y0. G43 H1 D1 Z3. M8 G73X-0.875Y3.75Z1.2R-.1Q.4F25 X-2.5Y3.825 X-4.125Y3.9 Y1.1 X-2.5Y1.175 X-0.875Y1.25 X1.625Y1.1 X3.25Y1.175 X4.875Y1.25 Y3.75 X3.25Y3.825 X1.625Y3.9 G80 // countersunk holes M5 M9 G0 G28 G91 Z0. T2 M6 S0 M3 G90 G54 X0. Y0. G43 H2 D2 Z3. M8 G81X-0.875Y3.75Z.25R-.1F25 X-2.5Y3.825 X-4.125Y3.9 Y1.1 X-2.5Y1.175 X-0.875Y1.25 X1.625Y1.1 X3.25Y1.175 X4.875Y1.25 Y3.75 X3.25Y3.825 X1.625Y3.9 G80
In order to make a pocket it seems I have to do 3 operations being careful not to mess up.
1) Rough in the pocket lying about the tool diameter (say it is 0.51 instead of 0.50) and select an artificial Z (-0.745 instead of the pocket bottom at -0.75) so that the rough box is within the finishing box by 50 mils (or less if you want). Since my pocket bleeds into the piece perimeter the wire frame boundary is slightly larger than the pocket itself in the side it bleeds over. That is the light blue line in the attached.
2) Then you do the contour telling BobCad the real diameter of the tool (0.50) and the real depth (-0.75). The contour uses the same light blue line as the boundary in the previous step. However, since we lied about the tool diameter then we get to finish it now.
3) Lastly you finish the pocket bottom at the real depth (-0.75), but with a fake tool diameter (0.51 instead of 0.50) so we do not touch the finished walls.
Am I going in the right direction?
Comments, suggestions?
Thanks!