Fusion 360 Chamfering: The Nitty Gritty FF111
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- Опубликовано: 22 авг 2024
- Chamfering in Fusion 360. Since two chamfer methods exist, how do you know which one to choose? First we'll talk differences. Next, we'll explore the nitty gritty: chamfering custom angles and how to handle a larger chamfer with a smaller tool!
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John,
Regardless of approach, one thing to be conscious of - particularly when chamfering small edge breaks - is to vary the contact point between the part edge and the tool between applications. Otherwise all your wear is focused on the same small area of the cutting edge. Later, if you need a wider chamfer that focused wear area will leave a cosmetically unpleasant ridge. Just change the tip offset for each job to walk the contact point up and down the cutting edge.
Can’t thank you enough for your content. I am making excellent parts and growing my machining business because of your videos.
I have struggled for so long because of this issue, I had chamfer modelled in and tried using 2D chamfer, glad you made this video! This is possibly the most helpful video I've seen for f360.
Hi John. I regularly have to chamfer a 12mm thick plate in my workshop. The plate is 1395mm OD 700mm ID & requires a 10mm chamfer to the OD . I can do this in 2 operations as i have 800mm y travel . The tool I use is a Seco inserted tool with 25mm end & total diameter of 39mm. I do 5 passes of 2mm depth of cut , the first cut removes the most material this changes with every change in depth of cut . The last cut cleans up any small stepovers. I use a couple of tools like this for chamfering or countersinking , cost effective and fast enough. May not be good on your little Tormach but you would find them useful in your other machines.
john, last week i used a cnc millling machine for the first time in my life. because i've watched many of your videos in advance, i was able to successfully do the cam, the fixturing and the machining without much hassle. the part came out great. thanks for doing these videos, keep 'em up (and sorry for the remark about metric vs imperial on one of your previous videos by the way, lol)
Small tip: you can actually use countersinks as chamfering tools, or at least the ones with three flutes. You just have a little work measuring in the geometry since the bottom of those have a little flat.
Klaufmann Single flutes work well too. I use them all the time. Spot drills do a great job also.
Ahhh, thanks NYC CNC -as usual, you clear up the conFusion 360!
You can get a better finish with a small chamfer mill on a large chamfer if you account for the flat that’s on the bottom. Usually .015 diameter flat on a 1/4” and a .006” diameter flat on an 1/8”
That’s why the chamfer comes out looking stepped when you do multiple depths, you’re programming it as if it’s a 0 diameter tool, but it’s really a .015” diameter tool, leaving you about. .004” step in the surface.
2D chamfer works pretty well with 3D/Modeled chamfers in my experience. You always select the upper contour of the modeled chamfer or it won't generate a tool path, set chamfer width too a thousand or even a tenth (if the chamfer needs to be held to a close dimension). If the chamfer isn't modeled, then you just add the chamfer width that you are looking for otherwise it will work off the modeled chamfer + specified chamfer width
One possible error here is that John is using a chamfer mill that comes to a point and doesn't have a flat spot at the tip (e.g., 1:30). However, many or most chamfer mills have a small flat spot at the end, as shown in the example from Fusion at 1:40. For example, if you use a 90 degree chamfer mill which has a 0.1 inch diameter flat spot and you don't account for this by entering it in the Fusion tool library (your cutter data), the mill will cut a chamfer 0.05 inches wider than you want. This is because you will be setting the height of the end of the tool (Z0) wrong by 0.05 inches by incorrectly accounting for a pointed tip versus flat. On some cutters, it is hard to see the flat end and/or hard to determine it's proper diameter.
I think you left out a good method for large chamfers. Rough the chamfer using 3D Adaptive or 3D Contour with a flat or bull nose end mill, finish up with the appropriate degree chamfer mill using 3D Contour. Use Maximum Stepdown on the Passes tab to control engagement. Note that I use flat nose chamfer mills.
5-axis should let you use any parallel cutter with flutes to cut a chamfer at "any" angle. Gives a constant cutting speed across the final face.
Consider it a challenge. Merry Christmas.
Learned several good things there. Thanks for sharing. Merry Christmas to you and the family.
Thanks Randy! Same to you!
For multiple passes on the chamfer, duplicate the operation and change the chamfer width of the first operation to a few thousandths less than the 2nd op/target dimension.
I’ve never tried, this but I don’t see why it wouldn’t work. :)
For modeled chamfers larger than your tool. Do some 3D Adaptive clearing with a Flat EM in the chamfer area before using the chamfer tool. Credit to w.A.f. for his comment on this. Also to Oakwood Machine Works, yes, you could use a mill drill, but I think you'd find you'd need a roughing and a finishing pass, so probably better to use a FEM that you are likely to use for an operation before this one for more efficient roughing and material removal.
Once the area is roughed, use 2D Contour from the TOP of the chamfer in multiple steps. Steps are duplicate operations, with just the Chamfer Tip Offset increased as you work down the part. You can use offsets larger than the width of the cutting face of your tool, but you can't use negative offsets, which is why you start from the top and work down.
i recently ran into this problem and you can use 3d contour with a regular chamfer tool, the only problem is fusion likes to error out if you use a pointed tip chamfer. setting it to zero it what causes the error of invalid tool type. hoewever, even setting it as low as 10 millionths is enough for fusion to not error, so setting it to .00001 will then allow it to make the path you want. this could be brought to the developers attention because cutting chamfers larger than the tool is no uncommon and the 3d contour tool path is probably the easiest fastest way to get your intended tool path.
Watched it, used it. Worked like a charm!
I am probably not the first to suggest this, but another way to accomplish the large chamfer with small bit is to model the bit as a tapered endmill, then use the Ramp Tool Path.
Learned a lot from the video and the new website looks great.
I would create the bodies in the second example a bit differently. I would create a duplicate of the body. I would then create 4 offset planes from the top and split that duplicate using Modify > Split Body command into 5 sepparate bodies.
Just a suggestion: put link to the website in the description.
At 1:19, John discusses how to use 2D Contour (not 2D Chamfer) to create toolpaths in designs where the chamfer is already drawn/modeled within the part. For the geometry, he says to select the BOTTOM edge of the chamfer. I've found for several of my somewhat complicated parts that selecting the bottom edge doesn't work, but selecting the top edge does. So if you have problems, try selecting the top edge and see if that helps. From thinking about this, I think either should work, so bottom might be the first option to try then top if bottom fails. It may or may not matter if you set Heights>Bottom Height to the same height as the geometry you selected. (I'm using version 2.0.10813)
"What it does is create this stack of bodies"
When Fusion went from 0 to 360 real quick. Someone call CSI!
#hitthefloor
For multiple depths you can create tapered mill with very small diameter say 0,01 mm. This will give you more options.
Chamfer questions the last couple of days. It's like you read my mind.
Very very informative. Thks a lot. Could you make a video about roughing and smoothing?
All the best for you, your family and friends.
Herri
Could you use a countersink to mill a chamfer? Would be an interesting video lol
Jhon Saunders I was listening to your podcast #41 Business of Machining and am a Machining student. I work at a Cup Printing company implementing Odoo. Outsourcing to India, wait a sec dont turn away cuz i said India lol. They are truly talented people. Im willing to share my experience with you via email/Skype. I want to take a class at NYC CNC, maybe after completing my 2 y degree in Houston Community College, but im a Solidworks guy. Back to Odoo its intresting, takes time to implement and could be quite expensive to have Westerners implement it for you. And forget about adding features on you own like you might do with your website. I feel like one really needs mentorship in running Odoo. I also think that works better with Jhon Grimsmos business model more. He, like me, has a defined number of products that he uses and consumables are defined as well. Plus knife options could be defined and order data easily retrieved in M.O.s (Manufacturing Orders) where they can be barcoded to specific shaller bins. Although am not sure if barcodes are "Open Source" on the community edition of Odoo. Like you said its not a matter of, if, but when to implement an erp system. I agree and would like to add to start small. You should not aim for a "big baing implementation" as my Indian Odoo guru put it but rather just one aspect like taking online orders and automatedly transfer them to Invoices and M.O.s which by default makes Delivery Orders, aka a shipping list. In which who ever ships a knife just ticks it off a list on his/her laptop. With the future potential of ticking it off your smart phone with a bit of white magic from India. And all of this is built in, other than the smart phone option. Its a matter of mentorship, guiding, hand-holding of using odoo because i dont think youtube videos and even udemy courses are sufficient. My estimation of required time to implement Odoo, for Grimsmo, is 4-6 hours a week of mentorship for two to three months at first. Then test, debug, refine and use for 6 months then repeat for new features he wants to further automate the manufacturing process...I dont know or understand your machine shop business model so cant say for you using Odoo. Do you already use it? This has goten too long for a RUclips comment. I love both your and Grimsmos work. I want to buy one of his Norseman knives but $5-600 for a used one, I was like let me hold on to my $50 knife for a year and then I will consider it. Come to think of it...it has been a year +. Why can I find your podcast on Soundcloud its my fav podcast app because it reliably reopens where i have last stopped the podcast and I can be sure I diddnt miss anything.
cupprinting.com or RUclips pak-man packaging
Any plans to do fillets like this? Just curious
is it possible to mill an inside chamfer with a end mill?
A lot of time 2d chamfer gives empty toolpath if you want to machine all edges in a single operation, no matter if you chose to work close to the tip or not and even if it has enough space with both variants, they still have a lot to work on this issues. Also roughing out an deeper V slot, with a 3d pocketing operatio its kind of problematic, becouse it always tryes to helix or plunges into the part, even if it has a lot of space to plange near, and by the way, plounge outside stock is an useless option in the linking tab.
If you make a sketch with a bigger boundry in direction of free space it tryes to go all round and below with a lot of useless moves..., rest machinning also gives some problems with that cusps, always you must be very carefully becouse rest tools engages to much material left from previous tool, even if you select 0.05 mm stepdown.
how about running it on a 5 axis?
Why does Fusion show the tool red at 11:45? I interpret this as a warning ... but I can't see what the problem is.
CAM assumes you have a stock material (not shown) and that creates the collision warning. From the setup you can change the stock to be the model and then there will be no warning, as it considers that the part is "finished", as in no more stock left.
Hold on a second... @ 2:30, that's #notpossiblenorideal Chamfer tools don't generally have a cutting edge on the shaft, just only at the angled head. How are you going to remove 1/2" of stock above the chamfer with a round shaft?
Look into drill mills. They can mill, drill, spot, and chamfer.
It's just a 90° end mill. It's fled all the way up, and instead of the bottom being flat, it's not a 90° point. You're prob new here, but that is what John uses for chamfers.
Does anyone know if it is possible to chamfer as machined edges?
e.g. if you have a tight corner that a tool can't reach in to. Is it possible to tell fusion to chamfer the edge left the the tool rather than following the contour in the model.
post here with more detail: forums.autodesk.com/t5/fusion-360-computer-aided/chamfer-edge-break-as-machined-contours-chamfer-rest-machining/td-p/8016914
Why does is the tool turning red at 11:47? I see this a lot and seems like it's showing a collision when there isn't one. I don't understand it. Thanks
Steve just Steve - Maybe it’s getting too hot due to friction? :) Just kidding. Probably some sort of built-in DRC (Design Rules Check) violation, is my guess.
I'm pretty sure it's considering a collision for some reason, just don't know why.
Possibly something to do with the default shaft and holder settings for the tool. Unrelated to that, it's a shame F360 doesn't allow the use of chamfer tools with 3D Contour.
The reason the tool is red is to let the user know that the tool is colliding with the stock. During that simulation the stock was not shown, but the program still calculates when collisions occur. In that instance, the stock would likely have been removed in a previous operation, and if the simulation included that/those previous operations there wouldn't have been a collision. But since that particular simulation didn't include the previous operations, the stock still existed and hence a collision occurred.
I think there is a "collision" since he is machining into the stock past the model, since the chamber isn't modeled. My understanding is that the red means you are cutting into the model
“.... tell me who is this incarnasio?”
Third