# 7th grade project **URL:** \ **Category:** No Judgement\ **Created:** [January 11, 2018, 5:35pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864 "2018-01-11T17:35:49Z")\ **Posts on this page:** 20\ **Page:** 4
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [February 1, 2018, 5:56pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/61 "2018-02-01T17:56:48Z")
I use 1/8" plastic and some small flathead screws to hold it to the plywood. ---
**Author:** ![Keith](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/keith/32/1332_2.png) [@Keith](https://forums.maslowcnc.com/u/Keith)\ **Post date:** [February 1, 2018, 5:58pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/62 "2018-02-01T17:58:49Z")
> [@MeticulousMaynard](#): > > I’d go for a wider tape the [3" wide tape](https://www.amazon.com/TapeCase-423-5-UHMW-Tape-5yds/dp/B01CL91OFM/ref=sr_1_3?s=industrial&ie=UTF8&qid=1517507595&sr=1-3&keywords=uhmw+tape+3) is reasonable at $25, but above that the price isn’t really worth it anymore. > [@MeticulousMaynard](#): > > round-over the edges This was one of my concerns with using it for a sled, which was why I bought the width I did since it was intended to be applied to 1/2 to 3/4 material. Personally, my plan is to use 1/4" HDPE on the bottom of a steel sled, but I plan on using 3 arc shaped pieces to reduce the size that I need to buy as well as providing air channels for the vacuum. ---
**Author:** ![Keith](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/keith/32/1332_2.png) [@Keith](https://forums.maslowcnc.com/u/Keith)\ **Post date:** [February 1, 2018, 5:59pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/63 "2018-02-01T17:59:22Z")
> [@blurfl](#): > > I use 1/8" plastic Hey @blurfl, could you provide some pictures? ---
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [February 1, 2018, 7:59pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/64 "2018-02-01T19:59:22Z")
The sled is much torn up, testing various linkages. Not much to see from the plastic side, a circle of [plastic](https://www.amazon.com/gp/product/B0070Z8I34/ref=od_aui_detailpages00?ie=UTF8&psc=1) with a round hole in the middle and three #4 flathead screws. I picked 1/8" because it was cheap and I had some 1/8" hardboard to put around it so I could cut the circles on the Maslow. ---
**Author:** ![Keith](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/keith/32/1332_2.png) [@Keith](https://forums.maslowcnc.com/u/Keith)\ **Post date:** [February 1, 2018, 8:12pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/65 "2018-02-01T20:12:19Z")
Nice find. And the three #4 screws hold the HDPE well? Also, what bit did you use to cut the plastic? ---
**Author:** ![blurfl](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/blurfl/32/9_2.png) [@blurfl](https://forums.maslowcnc.com/u/blurfl)\ **Post date:** [February 1, 2018, 8:18pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/66 "2018-02-01T20:18:04Z")
The screws do fine. It’s been a long time since I did the cutting, but it was probably a single flute 1/4" bit at 11K RPM and feedrate around 15ipm. Practice the cut in the outer corners with a small shape before doing the real cut… ---
**Author:** ![Keith](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/keith/32/1332_2.png) [@Keith](https://forums.maslowcnc.com/u/Keith)\ **Post date:** [February 1, 2018, 8:25pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/67 "2018-02-01T20:25:58Z")
cool thanks … ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 3, 2018, 1:51am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/68 "2018-02-03T01:51:04Z")
What type of bit do I need to do a round over? ---
**Author:** ![Keith](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/keith/32/1332_2.png) [@Keith](https://forums.maslowcnc.com/u/Keith)\ **Post date:** [February 3, 2018, 2:01am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/69 "2018-02-03T02:01:39Z")
I would buy something like this and do it manually: [roundover bit](http://www.acehardware.com/product/index.jsp?productId=98103986&KPID=24272323&cid=CAPLA:G:Shopping_-_Craftsman_-_RLSA&pla=pla_24272323&k_clickid=f25a446b-b995-45d1-acfd-2e48914d0f3b&gclid=CjwKCAiAtdDTBRArEiwAPT4y-yCTpIWRZikovTb8DHYohgcbte-P-i-EN2_DxVmrFr5zZ8YZ5_fSfhoCWvsQAvD_BwE) ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [February 3, 2018, 2:03am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/70 "2018-02-03T02:03:30Z")
a round over bit 🙂 something like these [https://www.amazon.com/s/?ie=UTF8&keywords=round+over+router+bit&tag=googhydr-20&index=aps&hvadid=153741193373&hvpos=1t1&hvnetw=g&hvrand=16715344582724606814&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031114&hvtargid=kwd-919673372&ref=pd\_sl\_15g6bum8eg\_e](https://www.amazon.com/s/?ie=UTF8&keywords=round+over+router+bit&tag=googhydr-20&index=aps&hvadid=153741193373&hvpos=1t1&hvnetw=g&hvrand=16715344582724606814&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031114&hvtargid=kwd-919673372&ref=pd_sl_15g6bum8eg_e) ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 4, 2018, 6:23am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/71 "2018-02-04T06:23:28Z")
@onifli is wondering if angles like this will work to support the spoil board and material. ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/f/fd68fc8a46450b8cda21b2ddce2e0fdbeb3cc477.jpeg) ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/b/b1e1820fdd137a21d8bd8a7b62b4ae1882f2ea35.jpeg) ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 4, 2018, 6:29am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/72 "2018-02-04T06:29:02Z")
should he have chain go behind now? he’s not far enough in to understand the changes being made. recommendations? here’s what he has so far. middle bar in front is going to move down to about 2’ above angle supports. ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/f/f646f4e34868509e8fe1592b66750476d2e767b6.jpeg) ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 4, 2018, 6:35am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/73 "2018-02-04T06:35:30Z")
can you explain how you used the hardboard and cut it in the maslow? ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [February 4, 2018, 6:49am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/74 "2018-02-04T06:49:58Z")
yes angles like that can hold the workpiece and wasteboard,just keep in mind that since that angle is 2". you need to have that much material or you run the risk of hitting the angle with the edge of the sled. most of the time you are not working that close to the edge anyway 🙂 but if you are wanting to bring in your plywood in pieces, you will want to have more support for it than just the two angles. ---
**Author:** ![Bee](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bee/32/2160_2.png) [@Bee](https://forums.maslowcnc.com/u/Bee)\ **Post date:** [February 4, 2018, 10:26am UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/75 "2018-02-04T10:26:03Z")
For your installation I’d suggest a bottom board. Mount a 2x4 with a bolt through it to the unistrut above the angles on each end. A minor primer on fasteners - most people see a fastener (bolt, or screw) as a “tightening force” pulling one surface towards another. While this is one of the functions of a fastener they most often are pinning a lateral force agains shear strength. In this case the angles will work, if you bold a “ledge” above them across as a working surface - you get 100% working surface from side to side. Without something like this, over time putting material on the angles you will bounce the material and eventually deform the angle and they will fail. The Ledge will straighten and absorb this force. I hope this helps Thank you ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 8, 2018, 5:17pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/76 "2018-02-08T17:17:23Z")
any recommendations on what cad program he should use? he’s done some autocad, tinkercad, sketchup before but not super proficient. he’s most comfortable with illustrator which he says can generate a svg file. would that work? i wouldn’t think so but i don’t know much about CAM. ---
**Author:** ![MeticulousMaynard](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/meticulousmaynard/32/2744_2.png) [@MeticulousMaynard](https://forums.maslowcnc.com/u/MeticulousMaynard)\ **Post date:** [February 8, 2018, 5:31pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/77 "2018-02-08T17:31:39Z")
If Illustrator can export .svg files, then he could use [MakerCAM.com](http://MakerCAM.com) to program his parts. It will import svg files just fine and it’s pretty straighforward to use. Bar goes through the workflow to generate G-Code from SVG in [this YouTube video](https://www.youtube.com/watch?v=W0mW_mm1iBI). The beginning of the video covers exporting from Sketch-up, but if you want to just skip ahead to the MakerCAM part go to 1:58. If he’s willing/has time to learn 3D CAD, I highly recommend either Fusion 360 or Onshape. Both are free programs for what he would be using them for. Fusion 360 is free for hobbyists and students, and somewhere around $300 a year if you’re actually making money using the program (which is nothing next to the $3,000-$7,000 other professional CAD subscriptions cost). It has built-in CAM, which is the reason that I primarily use it. Onshape is entirely open-source. It doesn’t have built-in CAM, but you can use the [Kiri:Moto app](https://www.youtube.com/watch?v=OFMoCXqpDwg) and that will give you CAM. ---
**Author:** ![lilimade](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@lilimade](https://forums.maslowcnc.com/u/lilimade)\ **Post date:** [February 8, 2018, 5:33pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/78 "2018-02-08T17:33:21Z")
thanks. i’m hoping he’ll go with fusion360 as well since it seems to make sense that it’s all integrated. he’s worried the learning curve is too high. ---
**Author:** ![MeticulousMaynard](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/meticulousmaynard/32/2744_2.png) [@MeticulousMaynard](https://forums.maslowcnc.com/u/MeticulousMaynard)\ **Post date:** [February 8, 2018, 5:43pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/79 "2018-02-08T17:43:05Z")
Since he has some experience already with CAD, the learning curve shouldn’t be too high. It took me about a week of playing around to start to get comfortable with it. I do have a lot of prior 3D CAD experience, however. Before Fusion, I had been drawing in Solidworks, Creo, AutoCAD, and Rhino since about 2011. For a crash course in the user interface, Lars Christensen does a good job in this video: I found these YouTube tutorials very helpful when I was first learning Fusion. They help cover building assemblies from sketches, user variables, nesting parts, and setting up CAM toolpaths. I made the flat pack stool from the second video [here](https://forums.maslowcnc.com/t/first-project-simple-flat-pack-stool/919). ---
**Author:** ![Bee](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bee/32/2160_2.png) [@Bee](https://forums.maslowcnc.com/u/Bee)\ **Post date:** [February 8, 2018, 6:37pm UTC](https://forums.maslowcnc.com/t/7th-grade-project/1864/80 "2018-02-08T18:37:42Z")
More obtuse but totally free and can do 2 & 3 is Blender. > **[blender.org - Home of the Blender project - Free and Open 3D Creation Software](https://www.blender.org/)** > > Home of the Blender project - Free and Open 3D Creation Software There are options to get .svg exports. I also see options to .dfx My son jumped in to blender at about 16 and is now 23, he can kick out a design pretty fast. Lots of youtube on how to get going. Thank you [Previous page](https://forums.maslowcnc.com/t/7th-grade-project/1864.md?page=3) [Next page](https://forums.maslowcnc.com/t/7th-grade-project/1864.md?page=5)