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Fusion 360 drag knife tutorialSoftware neededFusion 360 HYPERLINK " Excel Macro worksheet (G code swivel program / non-shopbot version)NC viewer add on for Fusion 360 ( HYPERLINK " download from F360 app store)Download and install this prior to this process.Basic Text editor ( PC: wordpad or Mac: Textedit)_________________________________________________________________________________Generate a 2D model to be cutGenerate a 2d Contour tool pathSet up Tab Select your X and Z axis-952469183243Zero your model to the work surface or bottom of your modelAdjust the stock as needed for your modelTool TabTool: You can use any flat end mill tool or make one with appropriate feed rate (see below)Feed rates (3-5in/sec per Donek video depending on your material)3in/sec or 180in/min or 4600 mm/min4 in/sec or 240 in/min or 6100 mm/min5in/sec or 300in/min or 7600 mm/minGeometry TabBe sure to cut interior parts (ie. The center of a letter like A,B,D,O,P, or R) before cutting the outside line. Select vectors in the order they should be cut. Be sure to turn on Preserve Order in the passes tab.Heights Tab Top height (model top 0mm)Bottom Height (model bottom 0mm)The bottom height must be set to zero or the code will not generate correctly.If you do not want to fully cut through your material you can add adjust your offset in Mach 3 to micro adjust your depth of cut. This can be done in the Mach3 offset tab.Adjust Feed, clearance and retract height accordingly-710642308091-6769090 Passes Tab Turn compensation off so the tool follows the center of the vectorBe sure to cut interior parts (ie. The center of a letter like A,B,D,O,P, or R) before cutting the outside line. Be sure to turn on Preserve order in the passes tab.Smoothing on Feed optimization off Multiple passes: Needs to be tested, But can probably be used.Linking tabTurn off keep tool down uncheckedTurn off lead in/outTurn off rampSelect your entry points in the linking tab to start and end your cuts along the center of a straight line to orient your blade correctly.adjust the start points on all vectors such that they begin and end in the same reduces the need to reorient the blade at the beginning of a cut and makes your tool paths begin and end on top of each other.* Can use FEED HOLD in Mach 3 to pause a cut program to re-orient blade it needed. Press START to resume cutting. (needs to be tested)-1173432272689Post process your tool path and save it to the desktop (i.e. xxx.tap)open the file with a text editor.Cut/copy the header information from the very top of the programdelete any S and F commands (S is spindle speed F is feed rate) See the explanation located on the Donek Excel Sheet under unexpected results for more info.Save your file xxxedit.tap-372111223066 Open the Donek Excel Sheet and select your xxxedit.tap file to add corner actionsComment Fields: ignore thisHeader Fields: ignore thisBlade offset: (this will be specific to your tool and machine. You’ll need to tune the setting with test cuts. See info on Donek Excel Sheet for more information.Swivel height: This should be a height measured from the top of the table that is just slightly less than the thickness of your material.*Posted on Donek Forum 2015*There is an updated version of the g-code swivel program on the web site. In all of the *versions, however, you simply need to enter a metric value for your swivel height and *offset to get it to function.This is as easy as just entering your metric value. You should have your Fusion 360 preferences set to metric in the Design and CAM. You should see G21 indicating metric units in your header code (G20 indicates imperial units)Run the excel utilitySave it with a new name i.e. xxxcorners.tapOpen your xxxcorners.tap file in a text editor and paste the block of code you cut from the original file to start your machine (The Donek Excel worksheet automatically deletes this information)-440809168910Delete the last 3 lines of core from the xxxcorners.tap fileG00 X0 Y0 Z0G00 X0 Y0 Z0 G00 X0 Y0 Z0This prevents a rapid movement to the model origin at the end of the program.Add your desired feed rate at the end of the first line that starts with G1. G1 indicates controlled movement. G0 indicates a rapid movement.-3881430Save your file Open the xxxcorners.tap file in Fusion 360. Use the the NC viewer app (found under the Manage tab in the CAM workspace. Must be downloaded from the app store and installed first.)Verify that your corner actions look correct and simulate your cuts)-622613262462Ideas to researchPause to re-orient blade between rapid movements between cuts.Use feed hold?? needs to be testedBEST PRACTICES (posted by Donek Tool in CNCZone forum)surface or fly cut your table to ensure it is totally flat and true to your machine (most important step)zero your cutter to the table surface, not the top of your material.make test cuts in your material, lower or raise your blade until the knife is just barely cutting through the material (can specify this in Depth tab??)set this position as your z-zeroBe sure you set the z zero to the bottom surface of your material and be sure to enter an accurate value for thickness. Never rely on the manufacturers stated value, measure the material with a caliper or micrometer.In the Donek Excel Macro worksheet (screen shot)set cut depth to the material thickness (the same you enter previously)This should match your material thickness of your Fusion 360 model)swivel depth should be between 0.001in and 0.010in (0.002 to 0.25mm) depending on the flatness of your material and how consistent it's thickness is.*Posted on Donek Forum 2015*There is an updated version of the g-code swivel program on the web site. In all of the *versions, however, you simply need to enter a metric value for your swivel height and *offset to get it to function.?tolerance angle should be left a 20degblade offset varies from machine to machine and is dependent on the model you use (see below)Advise on determining blade offset for your tool and machine.? The best starting point for a D1 or D3 tool is 0.065in (1.65mm)The best starting point for a D2 or D4 tool is Standard blade 0.140in or (3.56mm)Safety Blade 0.09 in or (2.29mm)depending on backlash and other factors in your machine, these values may not be accurate enough.The best way to fine tune this value is to cut test pieces. I recommend a 1.5in square.? observe the tool in actionif the tool turns too much at a corner, then the offset value is too largeif the tool does not turn far enough at a corner, then the offset value is too small? typically adjustments of 0.005in or 0.12 to 0.15 mm are recommended.repeat your test cut until your desired result is met.Cutting tips: if you are cutting an inlay, reverse your graphic and place the backside of your material face up on the table. This will prevent cut/swivel marks from being shown on your final productBe sure your blade is properly seated in the tool or you may get unexpected resultsIf you change brands of blades you might want to test or possibly re-tune your offset.Links and videos:Donek Video and spreadsheets here: HYPERLINK " You Tube Channel : HYPERLINK " with info about adding header code HYPERLINK "

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