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@@ -184,7 +184,7 @@ Offset and raster are 2 different paths of cutting
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We ran some tests on snap fit, conventional or climb milling and we varied with the feed and rpm. We did 2 of the 3 tests wrong the first time. With the Rpm and the feed tests we cut against the grain of the wood.
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### Feed and rpm test
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The top 3 are the feed tests. The values of those where 60 90 120. From top to bottom. The other 3 lines we varied with the rpm. //TODO: add rpm values
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#### Calculating the Vcutting and Tchip of the lines
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@@ -192,7 +192,7 @@ The top 3 are the feed tests. The values of those where 60 90 120. From top to b
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### Snap fit test
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The first time we did the snap fit test we set the offsets wrong. We accidentally did it to the outside instead of towards the inside.
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The first test where the 3 blocks on the right. We couldn't get those into the wood. Afterwards realized we set the offset wrong so the next day friday morning we did it again and then we got the expected result. The -0.1 was kind of snap fit but still a bit loose. -0.2 and -0.3 where more loose so these weren't qualified for snap fit. After that I wanted to try -0.05 and that worked even better than the -0.1. Because we could lift the wood partially without the snap fit getting loose and we still could get the piece of wood out.
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<video controls src="jj-500.mp4" title="Title"></video>
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@@ -265,6 +265,7 @@ These are my values. I also added offsets so it doesn't put the material in the
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When creating a toolpath it needs a tool assigned. We are using a preset from the fusion library the 5mm 3 flute bit. But we needed to modify it to 2 flute so that's what we did. The rest of the values where good and we had no issues milling.
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//TODO: Stock point (Starting point)
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#### Problems with generating toolpaths
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@@ -300,10 +301,37 @@ Otherwise it will drill through the entire material instead of 2 mm as a marker.
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This is my final results of my toolpaths. In the simulation I also don't get any errors.
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So it's time to start milling.
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So it's time to create the file.
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#### Post processing
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Post processing is the part where your toolpaths get converted to instructions for your machine. In my case it's the shopbot.
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After doing all the toolpaths I can finally press `Create NC Program` to create a .shb file.
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The only thing that I needed to do was to add the ShopBot post processor. Then I could hit `Post`. After that my shopbot file was created.
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In this operations tab you can select which toolpaths you wanna post process.
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So for my first file I only want the drill holes.
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https://cam.autodesk.com/hsmposts
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https://cam.autodesk.com/hsmposts
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#### The cutting
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When I started cutting I quickly noticed a problem. The toolhead wasn't going the right way. That was because the X and Y weren't set properly in the setup.
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The second issue I had was that the plunge too high So it went through the entire material at once and started moving. To fix that I needed to enable `Multiple depths` And set `Maximum Roughing` to 2.5mm instead of 15mm. So it doesn't go down 15 mm at once but 2.5mm.
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The third issue is that a lot of material doesn't get sucked into the vacuum system. We checked the tube of the vacuum system together and I re-taped it. Henk checked some other things but in the end we lowered the shoe and that seemed to help.
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Henk pointed out to always turn off spindle when you walk away or pause the machine during operation otherwise the spindle may create friction/heat and that can catch on fire and cause accidents.
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### The result
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This is the result. Tomorrow morning im going to sand it down and assemble it.
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