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VisuellWikitext

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 === Drilling and cutting PCB's (epoxy) ===
-This is my cnc-isolate and cnc-drilling workflow for creating pcbs.
+This is my (bkubiceks) current isolate and drilling workflow for creating pcbs.
 The PCB have to be put on a plain-milled surface of at least 3 mm thickness, as we are drilling.
 The slightest bend (0.2 mm) in the PCB will probably move the "Gravierstichel" out of the plane where it would isolate.
 You need a 0.6 or 0.8 mm drill with a mounting diameter suitable for the Kress-"Spannzange", probably 3mm or 1/8 inch=3.1something.
+We will create three ngc-files, one for the isolation, one for the drilling, and one for the final cutting. They will be glued together in one ngc file to align them using emc.
 * Prerequisites:
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 * Then start Visolate, load the gerber file, make if fullscreen. press Fit. Fix Topology. Make Toolpaths. Output file as "isolate_boardname.ngc"
-* Then comes the joining of the three ngc files. I will continue writing in a couple of days.
+* Then comes the joining of the three ngc files: Create a new ngc file starting with
+ M8 ; turn on spindle ; adjust to your mill
+ F450
+ G90
+ G21
+ G0 Z2.54 ; move up to 0.1 inch above
+ G0 X-0.24 Y-0.24   ;change this to align the drill holes with the the isolation path
+ G20
+ ;; end head
+then add the content of isolate_boardname.ngc without the m5 m3 tail. The isolation has relative coordinates, so we have to set a proper starting location via the previous head. Also, moving to the assumed Z=0 position would already mill the board, so we have to change the first Z move.
+comment out the first move to Z-0.01
+it could look something like this
+ G20
+ G17 G40 G49 G80
+ G91
+ G1 Z0.1
+ G0 X0.10814 Y0.28534
+ ;G1 Z-0.1 ;; uncommented t
+ G1 X0.00392 Y0
+ ;; end isolate
+insert a commented line with an end program.
+ ; G0 Z20 M2 ; program end to manual tool-change to drill
+after the isolation we will insert the content of drill_boardname.ngc
+adjust the variables posdown to -2.1 posup to 1, feedown to 100,feedup to 200
+after the cutting, create some blank lines and insert a section of cut_boardname.ngc, namely the part between (Start cutting wires) and (finished). This movements cut out the pcb from the surrounding.
+Maybe you have to invert all Y coordinates because of the mirroring
+The complete file then should have some head, the isolation, the drilling and the cutting.
+* Open this ngc file in axis, and adjust the relative position of the drills to the isolation by the G0 X Y in the head, saving and reloading in axis.
+* Check if wether the board is in a right orientation or if it needs to be mirrored.  This can be achieved by my gcode -filters: http://www.linuxcnc.org/images/fbfiles/files/grecode.zip   , see also this [http://www.linuxcnc.org/component/option,com_kunena/Itemid,20/func,view/catid,38/id,2288/limit,6/limitstart,12/lang,english/#2448 forum post]
+* after all is good, remove the commend right before the drilling, to have the the program stop there. Reload in axis. Insert a 30 Degree 0.1 or 0.2 mm "Gravierstichel", home the machine, touch off at a suitable location, and start the program.
+* If the isolation is not deep ennough, touch off z in lower height, and restart.
+Then Change to a 0.6 mm drill with a 3.12mm 1/8 inch holing diameter, touch of Z again, and re-insert the comment right before the drilling.
+* Reload in Axis, scroll to the line right before the drilling, right click->run from here.
+* do all the drilling and sidewards cutting.
+* if you really want things to be perfect, you could locate the most outwards line in the isolation, and move them deeper Z-0.1 ->Z-0.12 and the folling relative up-movent as well Z0.1 ->Z0.12. By that, there will be no copper close to the cutting locations.
 === Cutting and drilling Aluminium ===