Speeds & Feeds Tutorial for CNC Machines! WW164
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- čas přidán 3. 07. 2024
- Let's cover the basics of Machining Speeds & Feeds for CNC milling, including starting recipes for aluminum and steel, Speeds & Feeds calculator, how to calculate horsepower (HP) and an introduction to Chip Thinning!
Speeds & Feeds worksheet: www.nyccnc.com/getting-starte...
Aluminum End Mill: bit.ly/1LT7b1r
Steel End Mill: bit.ly/2eVK8fH
Sandvik Chip Thinning Video: bit.ly/2wZnu06
5 Reasons to Use a Fixture Plate on Your CNC Machine: bit.ly/3sNA4uH - Věda a technologie
John, that is FAR AND AWAY the BEST technical video you have ever done. No jumping around, just clear, easy to understand information. Just fantastic...
Thankyou!!!
I agree.
I still come back to this video when I take a long break from using the mill. This is golden information right here.
Outfreakingstanding! As a newbie I appreciate these basic videos. Thanks John!
Excellent information John. I really appreciate that you continue to put these helpful videos out. Keep up the great work.
What a video. I’m not a machinist, yet, but watching this video makes it look easy. Simple, clear, understanble for us. As always with all your videos, thank you.
Best video you've ever done!
Always a trip to see somebody who really loves what he does....
Love the channel!! Keep up the great work! I'm coming from a 3d printing background and trying to build my one CNC machine in an effort to get up to a tormach eventually. Your knowledge sharing efforts are priceless.
Awesome video... thanks John... all the best to you and your family!
i love that you love doing this stuff. I feel that at my core. This video was amazing.
Knocking out of the park John! Thats was an excellent and very well organized explanation of everything keep it up
Lot of information but easy to follow. Great explanation and thank you.
Thank you sincerely.
Your data is the best sharing technology.
Excellent video John, looking forward to the new website!
ATB, Robin
Very clearly and easy to understand ! Thanks !
Fascinated. A little overwhelming to someone just scratching the S&F surface but I get the concepts. Now the numbers in F360 tool path setup make more sense to me!
Thank you for providing this information. I found it very helpful.
I just went back and watched the video again. I believe that I picked up on more of what you were saying the second time. Thank you again.
Great video John thankyou. Good to see a Metric version in the Excel sheet
At first I was bummed you weren't making anything, but damn! this is a great video!
great informative videos that explain so accurate
Hey!
I see now that you already dealt with a chip thinning equation, and now I gotta see how well it matches my own equation that I sent the other day! :D
Wow now that was slot of food for thought I'm loving it ! If your saying more of this stuff is coming out on that website how am I going to sleep ? Great job
Excellent video.
Amazing video again buddy !
Good one. Much appreciated
Tks Will
Just what I needed!
As always, John, U Rock!
very helpful great video
Great video! Thanks!
John, you make some great videos. When I was starting out this type of information showing starting points for feeds and speeds really boosted my confidence. I don't know if you have it in the works but I'm hoping you follow up with a video showing how to optimize your recipe past that initial starting set of parameters. When I get a new cutter, I start at the established feed and speed and then tweak it during test cuts. Sound and finish and sometimes chip color (steel) help dial in the recipe I record for the tool. Would like to see how you do it.
And if you are feeling adventurous, I'd love to see your approach on finding a stability node.
Excellent!
I have a very similar spread sheet. I haven't added the chip thinning aspect because I hadn't fully grasped it. This video just closed the door on that. Although similar, my is , say backward. I approach it from availible hp at the spindle and MRR based on material. From there it's basicly a balance sheet DOC, WOC and chip load are manipulated so that the sheet balances HP, MRR and SFPM. This tend to be great for lower hp machines.
Horsepower is everything. I drill 2" holes 8 ft deep and my machine has 70 horsepower and that sometimes isnt enough. I never drill a pilot hole, thats dumb, only if youre machine had 5HP would i ever do that
Dude You make an amazing job.
Can you explain more about lathe turning feeds?
Specially when we have to make facing, grooving, parting, interrupted cutting, how to use the catalog charts, and how to undestand the chip breaking.
I mean for prototype I can make a mistake, but production is another story.
Thanks a lot for sharing.
Best video
Thanks
Funny you were talking about the trend to smaller step overs and showed the video with like 75% stepover. :-) Cutting 55-60 RC A2 is sure going to be interesting, that is going to take some specialized stuff I would think.
I do 75% in A2 all the time just smaller stepdown, faster
Hi John you have released another very good video as usual. I was just wondering if its at all possible if you might also be able to in your future video's to also include feeds, speeds, width and depth of cut information in metric as well if its not to much work for you. It would help us aussie's and other guys who use metric at work so I know how my feeds and speeds compare.
Steven Jevicki come on dude! He's done the heavy lifting for us. Multiplying by 25.4 isn't so hard. He's also included a metric calculator in his spreadsheet.
He's incredibly generous, don't push it!
The drawback might be that with someone who doesn't natively use metric and imperial you might get whacky 'accurate' conversions, for instance 40 thousandths of an inch would become 1.016mm. In the metric world we know it's bollocks and 1mm is sufficient but the 'imperial only' people really don't understand. Same with tapping drill sizes, it's easy for metric people to 'guess' with a very high high degree of accuracy a tapping drill in metric based purely on thread diameter and pitch, imperial people do those strange conversions nearly always ending up with undersized holes and higher tapping loads. In the imperial world of threads it's almost pure voodoo with letter number and fractional drill sizes with dozens of lookup tables. Having said that an imperial fastener head size (post whitworth and in the UNC/UNF era) was easy to guess by eye, metric is significantly less so particularly when standard head sizes are abandoned because of cost/weight saving.
please share link for metric system excel sheet.
Best video seen so far explaining cutting parameters
Find a feed and speed you like. Take notes. Find the chipload of it. Divide the chipload by diameter of the tool you used. That number is now your constant you multiply your tool diameter to get chipload and also the chipload of a 1” tool
If chip evacuation is a problem use less flutes. No shame in using 2 flutes on steels either. I recommend all finish passes have spring passes or run finish twice for best surface finish and straightness. Programming with feed per rev is optimal especially if chatter is a problem and you must reduce RPM.
Finishing chipload .008xD
For weaker longer tools distribute engagement and depth and reduce SFM till no chatter occurs. Reduce chipload by 20%. Feed per rev is highly recommended
Here’s my recommendations (commit to the cut! And have enough HP)
1018 steel
600-700 sfm
Chipload .006”xD
Radial up to 100%
Axial 150-200%
Stainless
304/303 sst
300-600sfm
.003-.006xD
Radial up to 100%
Axial 150%
Aluminum
Max sfm
Chipload - .012”xD
Radial up to 100%
Axial up to 100%
Thanks for all those educational videos! I just tested one of You advices and, whow, what a difference. Lots remowed without the mini mill jumping.In the video You refer to some Excel sheets to calculate RPM, Surface speed, inch per cut etc.Can I ´get hold of ttht some way?Regards,Stefan von Bromsen
@NYC CNC I was checking the math in your calculator, it's not off by much, but there is a bit of a mistake in the "Radial Chip Thinning" portion of the calculator. In the square root of the denominator you included the -1. You have to take the square root and then subtract one. Changes the IPT (Actual) result just a bit. Hope that helps. Keep up the great work!
I was just about to ask about it and i saw your comment.
@Bay Van, way to stay on top of your math :)
Make sure you note the change so your chip thinning calculation is correct...Take care
@@ciscohernandez4384 Just found the same error when trying to recreate my own calculation. The -1 isn't in the square root operation in the reference equation. Great video though!
Nice
I would to see a video like this for lathe.
Great material as always John. It looks as though your spreadsheet applies to pocket or trochoidal machine ops. In using a profile op (on a CNC router), there of course would be no step over, so I’m sure the DOC would have to be affected. Although I have a 3kw motor and have done aluminum with varying success, I hope to dial in the profile op to yield consistency in performance and finish. The torque curve on the motor makes speeds greater than 7;000 RPM a necessity in aluminum, (in softer materials I have more latitude). It is a shame that most F&S calculators on the net leave out DOC (don’t quite understand that). Any advise from you or the community here would be appreciated.
Thanks. - Walt
Thanks bro
What is the best software or application for calculating speeds and feeds for cnc machining?
I don't have a VFD so I'm fixed at a certain rpm on my spindle can I calculate everything with my rpm as a fixed variable?
I personally don't like set screw holders. The screws get stuck and stripped, runout is generally worse than ER, marginal holding power.
The rest of the material is a nice presentation of the S&F concepts. 2 thumbs up! I wasted SOOOOO much time until I took the time to learn how to properly load my tools. After digging in to the topic, I made parts faster AND my tools last longer.
Great explanation here, but I'm really surprised you don't use GWizard Feeds and Speeds calculator. It takes all of these variables into consideration (material hardness, chip thinning, surface speed, horsepower, etc) but also considers much more, such as tool deflection, for a total of 60 variables. Surely you must know about it?
None of that matters if you follow NYC CNC advice on tool setup. You'll make scrap and get hurt. Work holding matters too. I've seen a 12,7 mm drill push a 30 tonne block because the guy had to high of rpm and it dulled it quick
Scotty, I need more power!
John, do you go over this stuff in your classes?
Matweb has the largest database of material specifications. Though doesn't list K factors
Great video John, thank you. Interesting to see the comparison in your video at 16:03. The very thin chips tend to evacuate in a more "random" direction and you can see many of the chips re-enter between the cutter and the material which would definitely increase tool wear.
Christo Candiotes I have experience that, making thicker chip have more mass to fly with a better and longer parabola to corners of the enclosure. Thinner get often stuck due to sprayed coolant.
The amazing Guy, Can i get this sheet?
Any tips for brass? Suggest IPT etc.
Please do a video on Haas speeds and feeds
NYC CNC ;)
The horsepower required refers to the spindle only yes?
I can never find a good place for info when I need to calculate drilling feeds for a CNC lathe. What’s the formula when converting your calculations from the mill to the lathe?
what works for cast iron track rail...? for anvil surfacing..
Hastelloy any suggestions?
I understand that if the IPT is not correct, the chip will not come out correctly but this part is still not clear to me for example
My calculations say that IPT (Programmed) = 0.004 but IPT (Actual) is =0.00079599, what should I do? Increase feed rate or decrease rpm or what is the solution
I need a way to override the calculations that are made in Fusion 360. I work with wood, and there is no need for the settings the software employs. If I were to use them, it would be highly inefficient. I need to be able to set my own feeds and speeds. Without them affecting one another. For example 500 inches per minute is what we use on our machines for travel, and 20,000 rotations per minute when we are cutting our products. How can I set this without them re calculating each other, or other settings?
HI ! In the chip thinning, either your Excel formula or the pic formula is not correct, In the pic formula you can see the "-1" OUTSIDE the SQRT, but you included INSIDE it. That means your formula must be "=F4/(($B$4*(E4))/(SQRT(E4)-1))" or the formula in the pic is not correct. Thank you for your videos !
Of course all of that thick to thin is based on climb milling. Which is admittedly the CNC way. But I wonder if there are still any rules around that work for manual machining, where climb milling is likely to toss your endmill across the room?
l wilton you can climb on a manual
Looks like on the 0.001 cut that your getting alot more wrap in the chip and having to cut it a second time
Low engagement deep cuts is not going anywhere but in my opinion real high efficiency milling is full depth high engagement. Power milling results in the fastest run times and time saved completely outweighed tool life.
Trying to research on my phone and candy see what's going on I'll try to remember to find this when I'm on my computer again
Nothing to do with the video, but my 3 year old likes to dance to your theme music.
I'm really trying to understand this, but I'm still lost... :(
One quick (hopefully constructive) note on the new intro: Every time I see it I think my screen is glitching out, a negative thing/feeling. I then realize it's on purpose. The point is a lot of people will watch your vids starting with a subconscious negative feeling.
Great video otherwise, thanks for all you and your crew do!
Keith Strang I have the same feeling every time.
18:39 your excel equation and equation as written don't match. The written equation says sqrt(diameter/radial stepover) - 1 in the denominator, your excel equation says sqrt((diameter/radial stepover) - 1).
On that spreadsheet. Cell I60 should be " =+$C$60*H60 " . Inches are so horrible. :-)
1/4 bits could easily be run at 004-008 thou though. 001 would take all day 😂
I FUCKING LOVE YOU
Why do VMC machinists insist on using IPM instead of IPR? If chipload per tooth is so important, wouldnt it be wise to synchronize Feed with RPM/SFM?
Because when you're setting up your toolpaths in CAM, the two variables that you need to put in are speed and feedrate (measured in IPM). While IPR is useful for calculations, you don't put that value into the software.
None of this made sense to me :(
Confusing with inches. I'm from Sweden and we use the metric system.
took me so long to figure out that tenths are smaller than thousandths .... wtf imperial..
Tenths of a one thousandth: 5 tenths = half a thousandth = .0005"
So strange, I am from U.S. and found learning metric no problem at all. Your English is tops by way.
@Matt Davis, tenths aren't smaller than thousandths.... .1 = 1 tenth, .01=1 hundreth, .001=1 thousandth
thats what makes sense but it seems very common (as used in the video) to use a tenth to refer to a tenth of a thousandth (0.0001). For metric a tenth is a 0.1mm and a tenth of a thousandth 0.0001mm is outside of the range I can even measure let alone machine. So it is pretty confusing. From what I have seen tenth of an inch 0.1 is rarely used.. would be more likely to be using fractional representation at that size in imperial.
My God - Americans need to be smart to operate that insane imperial system.
Great channel and information though!
hEY NYC CNC .. I am from India and we are not that much used to inches .. Can you do this same video in mm .. also we are authorized dealers of autodesk products here .. And just now we have started selling some Fusion 360 licenses ... We are just 6 months old to CAM and it would be great if you can teach us how to choose Feeds and speeds (in mm) according to a specific machine ...
Also it would be great if you can teach us how to choose feeds and speeds for adaptive clearing in mm
Sounds rich and lazy! If you can't translate inches to millimeters, maybe you should close your company and start selling something else non technical?
How about pottery?
Aadithya Sathyanarayanan just convert the numbers your intested in???
Cole Johnson that's what i have been doing ..
Frank Müller just think before you speak in a video sharing website like this .. I just wanted to get a grasp of the information in the video - where mm is what I am used to and I just gave my suggestion .. Didnt force anyone to make a video in mm at gun point ..
to the pottery making suggestion that you gave - you speak like this (in India) we will hit you with slippers .. if you speak immaturely like this ..know the language that you are using .. even we know to speak rudely like this
I thought before I wrote... I can assure you... maybe if you would have done so yourself you would not have asked for someone to rerecord a whole video, just because you are too lazy to use your calculator. (Assuming you are able to do so!)
It sure looks like I hit the mark with my comments and you are rightfully upset... but you should direct your anger towards yourself if you don't like the image in the mirror.
And about the pottery and slipper issue... really?
How can you be offended about something that isn't true? ;)
😅😅😅😅 you have wizard man....online calculator.. for 10000 materials.....
Sorry had stop watching at the start, i was hoping maybe to learn something. But when you recommended a side lock instead of a collet for a 1/4" tool that makes me doubtful. But then you said that you dont need to grind a flat, that is almost the dumbest thing ive ever heard. Dangerous, you shouldn't be teaching people to cut corners cause you've been lucky and lazy, somebody will get hurt. You probably end up with steps on the surface, in a corner it will pull out. I recommend buying the best toolholders you can buy. Nikkon holders and collets. Roughing use a side lock, make sure flat is as deep as the chamfer on set screw but no deeper. Then lightly snug set screw and carefully you should be able to slightly pull the tool out and then tighten set screw. You always do that so if the tool becomes loose while cutting the tool can only move in and shorten the tool. It will happen someday and atleast if you the the tool wont gouge the part. Not good to break a tool and scrap a part. I machine 3d shapes into steel the size of your car, i know
We program very aggressively at my shop and I cant think of any time we've needed a Weldon flat on a .25 endmill. Ever. I also question YOUR knowledge when you recommend milling in an ER collet over a solid endmill holder. If you have good tooling, the solid endmill is a much more rigid option. Aside from speeds and feeds being on the conservative side, there's nothing wrong with the advice given in this video.
hi, do the same thing but for a “lathe” machine!!!!