Fusion 360 Sketch Constraints Make Math Easy! Fusion Friday #30

[@TheDirtCreature]

This was one of the most helpful videos about 360 I have seen as a newbie. I spent the last 5 hours battling a sketch and was curious about offsets. Found this video somehow from that and now you've solved about 20 different problems I was having. Thank you so much.

[@PeterWMeek]

Getting more and more comfortable with Fusion 360 every Friday. Thanks.

[@GrowingWardFamily]

Thanks for the video, I'm a CAD student and your playlists are helping me wrap my head around cnc programming.

[@billmoran3812]

John, I'm excited about Fusion 360. I've worked with AutoCAD for 30 years. The commands in Fusion 360 are so similar! I thought about learning SolidWorks, but Fusion seems so much easier for me to learn. Your videos are a great source of info. I'm thinking of learning Fusion 360 and doing design work for a local job shop when I retire in a couple years. I don't need to make a living at it, but a few bucks might be nice.

[@twm4259]

Don't feel guilty about having an intern do the kinds of stuff that you had (and still sometimes have) to do. You are giving him a realistic view of what it takes to succeed at business. There are simply times everyone has to roll up their sleeves and do "menial" tasks. I have very senior people, paid a whole lot of money and I still expect them to take out the garbage (as do I sometimes). I am reminded of the time honored tradition in the Navy where every single person on an aircraft carrier (captain included) walk shoulder to shoulder to inspect literally every square inch the carrier deck for anything that could be sucked into a jet engine which could shut down the carrier deck -- which is undoubtedly the single most important function of the ship. By introducing this young man to reality he learns the stuff that really keeps a business running. It isn't always glamor and the sooner you learn that the better!

[@jeromevuarand3768]

You should zoom in with your 1/8th circle at the end to check, you'd find out the gap is actually smaller than that. It's because your constraint distance is not orthogonal to the two small circles.

[@jimlake5404]

John, I have watched many Fusion 360 tutorials, but yours are the best. Do more of them.

[@jimlake5404]

Fusion 360 applied to turning on the Slant Pro Lath, if possible. Especially CAM.

[@r.j.sworkshop7883]

For the last slot sketch I would have done the same constraint method, but I would have done it along the default X and Y axis. As you finished your sketch I suddenly realized that by not using the X and Y but your own construction axis you can easily change the dimension between the slots, and more importantly you can easily change the quantity of slots. Change the 90 to 72 and you can pattern 5 slots. Nice work.

[@edwelch1986]

John, Great many thanks for the vids, I down load them, and play them with Fusion open, it's like being in class with you, except I can rewind if I'm not sure or missed a step or concept. Best Fusion tutorials out there !

[@DonDegidio]

John, Nice to see how you've become more comfortable with Fusion360. I guess what they say 'practice makes perfect' is true. :-)

[@eddrm4685]

I love the use of a spreadsheet as your calculator, that's awesome. I'm going to have to try it out.

[@earl5582]

Great instruction that I needed to make a part. LOL 4:14 “does that make sense? If not pay attention!… errrr follow along”

[@zfotoguy71]

Nice video. I think this was more helpful than many other F360 videos I've seen. I learned several things today. :) Thanks for being awesome!

[@Heinrich801703]

Hahaha!! "Does that make sense? If not ..PAY ATTENTION..er, follow along."" Really good tutorial. Totally appreciated.

[@886014]

Nice one John. I didn't know about that X shortcut. Brilliant! Keep up the great tutorials.

[@harveydix7611]

Its a miracle!! I finally ended up with a drawing that looks like yours. Thanks for a great video!! :))

[@mikebrowne5152]

Great info. Sometimes it's the simple stuff that brings it all together! Thanks!

[@KArts2004]

Exactly what I was looking for! Jihaaa! Started yesterday with Fusion! Thanks from Munich Germany!

[@PhilWaud]

awesome tutorial Jon, thanks. best video you've done in ages!

[@VLAHECO]

so cool Fusion360 with John :D

[@brucethec8150]

Call me nitpicking but to make the 3 tangent circle faster, use the the 3 tangent circle command on the circle drop down menu. it's the bottom one.

[@mikehorrod4367]

perfectly paced to do it along with you.

[@robn2497]

I use sketch constraints for everything. and math inside dimensions d1/d2 for mirrors rectangular patterns and circular patters. Don't need spread sheet. Just check out Manage Parameters. You can name and track all your dimensions there. So the part is built by logic and can be rescaled if required.

[@robn2497]

I'm an inventor Pro user... I think its "User parameters" In Fusion 360.

[@MrDaniell1234]

the other way ( 360 / 23 / 2 / 2 ) * 1 mm good speed for your newbies, you can right click to get the diamention type as well

[@Tools4Machines]

Excellent pace with the narrative on this one John. Easier to soak it all up in a more relaxed rhythm. -- Cheers, Gary

[@roguedronepilot6946]

It Just so happens I was trying to design a motor mount for a drone frame last night and got stuck on spacing out the slots this post has solved my problems., Fate !!! thanks for the grate post!!! John

[@danielkitson6878]

hi john, great video i would have tried to draw that without using the constraints, keep up the good work, thanks daniel

[@easyelectronicsru]

Is there a way to make the relationship between the two sketches? For example, to two circles lying on orthogonal planes were connected in the same plane, for example the coordinate X Move one circle - moving the second.

[@samboles8796]

This was a really good tutorial , thanks

[@jamescullins2709]

Very good!

[@genin69]

Centre point arc slot could probably have done those inner cut outs?

[@gadget01]

Brilliant tutorial, thank you for sharing

[@tornadokat]

Let's pretend two of these discs are installed underneath a gravity hopper and used to feed 7mm rods or tubes. One issue I see is the rod/tubes getting wedged in the void because of the narrow wall angle. In that case, the arc that forms in inside edge of the void should be brought out to where the rod/tubes would hit the arc just before the diameter of the rod hits both sides of the void.

[@joeynuggetz]

Very cool!

[@stahlinstudios2067]

The image you were working from looked like an encoder wheel. But now it is some type of indexing plate? Fusion is so darn handy. That part could be an interesting work holding challenge! I hope we will see you cut it.

[@occamssawzall3486]

Easy peasy Flat aluminum plate, Double sided carpet tape, no coolant. :)

[@stahlinstudios2067]

yep... thats what I was thinking. I use 3m 9579 series double sided tape. (pressure sensitive adhesive) It holds almost too good for thin parts. Kind of expensive but worth every penny if you need your parts to not slip.

[@occamssawzall3486]

+Stahlin Studios Acetone IE nail polish remover takes the adhesive right off. You can also get a wire clay cutter. (Like $5) that you can work underneath the part to get it off. Little safer than trying to pry it off with a metal putty knife.

[@stahlinstudios2067]

clay cutter.... brilliant

[@occamssawzall3486]

+NYC CNC you just use it cuz you like the smell :D

[@easyelectronicsru]

What software is used to capture video from the screen? He is able to see the keyboard shortcuts?

[@JOHNPHUFNAGEL]

Thats awesome!!

[@mohammedhassen696]

insane! how you did that. it will take me a about a week to learn what you just did! Thanks a mil

[@mohammedhassen696]

Most definitely

[@ScottMoyse]

Hi John, can you start showing people how to use parameters? Qty is a good one here, because you used it in multiple calculations and features.

[@ScottMoyse]

NYC CNC it's case sensitive

[@ChrisColeArcher]

Wouldn't you want to use a dimensioned arc for those spaced screw slots? Since your 1/8th gap would actually be a little undersized?

[@76Raby]

Thanks, I was about to create almost the same thing for optical sensor.

[@genin69]

I have question tho.. so youve used extrude and patterns to finish your design.. how would you go about finalizing that as a DXF drawing to sent to have laser cut? Is there a quick shortcut way to do that?

[@saggynun1802]

New sketch. Then project the body onto the sketch. Then right click sketch and save as dxf.

[@NickMcEntee]

Is there a feature in fusion that estimates the weight based on the material?

[@GregsGarage]

fantastic!

[@occamssawzall3486]

Find it interesting that you built and sketchers out the cut out section. I would have built one of actual fin portions and arrayed that sketch around And extruded it. And I don't think using the straight line chord length of .125 between those slots is quite the right way. I would have set an additional.125 circle with the center coincidental to the midline circle and tangent to the construction line for the angle and the slot circle.

[@occamssawzall3486]

And a good check would to have been to sketch 2 straight lines across that are tangent to the radius at the end of the slot across to the slot radius opposite it. Then check the distance between the 2 lines you just drew and it should measure exactly .125

[@saggynun1802]

Thanks I learn a few things. :). Is there a reason to extrude and cut rather than choosing to not extruded those section in the first extrusion?

[@ziomalZparafii]

Saggy Nun so you can do circular pattern on the feature (cut)

[@mohammedhassen696]

John. I could really use some assistance with a part I am trying to model up. I have scanned in the part but the part has small teeth all around it which the scanner sees but when I fuse the model the teeth all get mangled up. I have tried meshmixer and some other modeling programs but they are not the solution. Your time is precious so I will not want it for free. Please let me know if you could look at it for me. Thank you

[@mohammedhassen696]

really battled with getting the last .125 to attach to the outside circle - gave up eventually.

[@dokola]

Nice tutorial. How do I verify that the drawing is fully constrained? Inventor changes the color line in the sketch, but Fusion ....?

[@ElizabethGreene]

Fusion changes the color too. Black is constrained, Green is fixed, Purple is projected, and Blue is unconstrained.

[@tripyderron]

Did you make this part for someone in railway?

[@djdelorie]

When doing the inner slots, using a chord along the construction circle as a reference will not give you 0.125 spacing - you can confirm this by setting the ID closer to the 0.5" center cutout (i.e. really thick "slots" will exaggerate any error). A better way is to add two construction lines 0.0625" away from, and parallel to, the axes, and make your end-circles tangent to those (i.e. construct your constraints first!). That way your gap is constant independent of radius (which a radial line is not, it describes a wedge). Another way is to set the distance between the centers of the two end-circles to a known distance, but then your gap is dependent on your slot width :-P

[@fanartist_kor5338]

good!

[@konobikundude]

John, do you happen to know if there's a way to maintain parametric relations across files in fusion360 ?

[@konobikundude]

Any idea if it's something that the Fusion360 folks would have in mind? I'm thinking about modular design and interchangeable components, so some way to manage changes between files would be awesome.

[@konobikundude]

One place I could see this being especially useful for a shop like yours John, is for being able to reuse jigs and clamps, etc. modularize it a little.

[@gayle3860]

Cool!!!

[@paulwilliamson5985]

Depending on how the gap between slots was measured or derived, it seems unlikely that the chord is exactly what you want. You probably want the minimum distance between those two circles, which lies on the line between their centers. At this scale you might never see the difference, but it shouldn't be too hard to construct the right line. It's harder than it should be, though, since it appears you can't have a perpendicular constraint to a circle or arc, which would make it easy to construct the needed line segment. The best fully-parametric way I could come up with is to draw the line segment from circle center to circle center, and dimension it with a formula 1/8 + (d2-d1)/2, where d2 and d1 are the inner and outer diameters defining the slots. Can anybody see a nicer way to do this?

[@PeterWMeek]

I was thinking that myself: constrain the center to center distance to be 1/8 plus the diameter (actually, twice the radii) of the circles. By using half the difference between the inner and outer diameters you are just calculating the length of a single radius. (If I haven't messed up how I'm thinking of it.) I think that will make the gap too small by one radius.

[@paulwilliamson5985]

Peter W. Meek I was thinking the same until I tried it. The diameter (two radii) we want for the little circles is the difference between the radii of the big circles. That's half the difference in their diameters.

[@paulwilliamson5985]

Good insight that what we really need is a distance constraint between the circle centers. I got conceptually hung up on drawing a line, and made it harder than it needed to be. Now if Fusion 360 would just let us dimension the distance between the circles themselves, we wouldn't even need a formula.

[@NollywoodStudio]

Merci ! ;)

[@RS2Racer91]

Hi John! I want to become a Patreon supporter, but I don't have a credit card (it is not common (or needed) in the Netherlands). I do have a PayPal acount, but if I want to add that it still demands for a credit card. (I have enough money on it) Do you know of a other way I could try?

[@RS2Racer91]

Thank you, I will wait for your answer!

[@RS2Racer91]

Thanks for reporting back, I will try that and let you know if it works!

[@RS2Racer91]

Just tried it, and it works! (I already had verified my bank account so it was pretty quick to solve)

[@jamessmith4015]

why.couldnt you just do a circular pattern and add the number of spaces you might not need excel

[@CatNolara]

Maybe it was just better understandable this way. Of course you don't need it, but some may not have understood why the calculation has to be this way otherwise.

[@edwelch1986]

For anyone wanting to make a logo from a JPEG into SGV format to be loaded into Fusion: kzbin.info/www/bejne/raXHlINpeMSWfLs