Master The Most Important Tool In Machining

[@ericsandberg3167]

That's probably the best presentation on cosine error I've ever seen, clear, concise and with a directly relatable example anyone can follow....well done Travis.

[@travisjarrett2355]

Thanks Eric! I appreciate that.

[@桂森馮]

mustertribution

[@Kardos55]

Notice how clean and organized every workspace is a TITANS of CNC . . . cleanliness is key.

[@travisjarrett2355]

I agree Karlo. A clean shop is an accurate shop!

[@ascobie22]

Great stuff, industry needs more videos like this readily accessible for newbies

[@travisjarrett2355]

Thank you Adam. Appreciate you taking the time to comment my friend.

[@DolezalPetr]

@@travisjarrett2355 Huh cool.

[@Metaldetectiontubeworldwide]

Its Just finding , the right ... gem -like Channels like TITAN'S 😉😇 They have tonnes of very cool video's 😉

[@hcr-motorworks]

THIS! so much time in Trig class doing formula's and calculations and not once did any professor ever have a practical example in a real world environment to justify the methods. Thank you

[@travisjarrett2355]

Ha ha. I hear you! Trig matters and I always enjoy applying it in real life.

[@Jon-O.]

Yes shop teacher taught me more about trig than the mathematician teacher could ever teach.

[@rcandcnc9684]

"If you are of the metric persuation" has got to be the most polite way of saying that I have ever heard. Great video, high class, thanks Travis-senpai.

[@travisjarrett2355]

Ha ha, thank you very much my friend.

[@legacyfarmmarket]

This is the most clear and informative video on indicators and cosine error on YT. Excellent video.

[@travisjarrett2355]

Thank you very much my friend. We're just glad to help out where we can.

[@fightswithspirits915]

Brings back memories...first job after high school. Best job ever is making things.

[@karthikr5927]

One of the best explanation and illustration as well for the cosine error.

[@johnkeefe20]

Excellent! If you don't start right you just make scrap. Questioning the setup is key to getting an accurate result. This is the best discussion, in 40+ years, I've seen.

[@travisjarrett2355]

Thank you John. We appreciate that.

[@steinarne79]

This is actually one of the most important videos on the entire channel!

[@Jatsekusama]

Quality academy with Travis!!! Please make it happen!!!

[@lawriealush-jaggs1473]

Wow! Lucid, accurate, concise, well practiced - not a single UM. Marvelous.

[@Chriss120]

important lesson for every new learner, and no corners cut.

[@dzarren]

From what I understand, dial test indicators are designed to read most accurately when operating at 12 degrees to the surface. This is because it is often impossible to get the stylus exactly parallel to the measured surfaces in many Cases, so it was designed to operate at a certain angle, I think 12 degrees.

[@travisjarrett2355]

It depends on the manufacturer of the dial test indicator and you should definitely be familiar with their instructions. Thank you for adding this and thank you for watching.

[@mattb6646]

Yeah most of them will tell you what degree to place it at, assuming you bought it brand new. My interapids came with infomanuals explaining it

[@jonahbrame7874]

I have never seen someone give such a clear graphical explanation of the exact mechanics of the cosine error on a dial test indicator. I can intuit it and know that the tip travels a longer distance when it is not oriented parallel to the surface, but I would have had a really hard time explaining the exact mechanics of it to another person. Nicely done!

[@travisjarrett2355]

Thank you Jonah. We appreciate the feedback!

[@ProTasiable]

Cosine error was a common problem for me and others when doing my machining course. At the time we didn’t know but looking back it’s easily looked over when setting up the DTI specially when new to the trade and with limited time to manufacture.

[@ThorloxGaming]

As student learning the craft I never really understood how they worked so I avoided using them, now I have a much better understanding on how to use them and when! :D thank you

[@travisjarrett2355]

Thank you for that my friend. That is what we are hoping to achieve.

[@ClappedOut]

Actual in depth information... with math.. and nice graphics explaining it... wow! love it

[@Metaldetectiontubeworldwide]

Not only is the machining in your video's on a topnotch level ☆☆☆☆☆ Editing and cinematics are on that same expert plane , very very well done SIR !! GRTZZ FROM THE NETHERLANDS Johny Geerts

[@travisjarrett2355]

Thanks for watching Johny. We appreciate the support.

[@Metaldetectiontubeworldwide]

@@travisjarrett2355 and we the awesome whelth on 8nfirmation and learnings we get ☆☆☆☆☆

[@divorcedmoms2260]

This is great for new apprentices around the world!

[@solidkreate5007]

Once again TY guys for making me a better Tool Engineer. This is invaluable information that just makes a me an even better designer.

[@loukola5353]

Good video Travis and Titan crew.

[@slavikmarinovski2249]

Great video, such a basic issue that many are simply unaware of. looking forward for more content like this, also in GD&T issues like MMC / profile to datum / positions and how it they can be best manufactured and inspected, both in process and after. Thank you!

[@travisjarrett2355]

Thank you Slavik. We appreciate the feedback.

[@poetac15]

I second the request for gd&t content. I feel like I’m severely lacking in that area. In particular it would be helpful to see “real world” part inspection to gd&t callouts.

[@seancollins9745]

Yes, I've had a 4 jaw chuck on my lathe since I got it. I indicate everything out of habit now

[@williamalbeiroguzmanvillam1737]

Gracias por compartir todos los conocimientos, inicie a ver tus videos hace poco y aprendemos muchas cosas, también que tienen traducción tus videos felicitaciones a todo el equipo de trabajo.

[@nickb3005]

Excellant demonstration! .003 is alot and that difference of the angle was not much. I'm actually surprised to see that. Very enlightning. Thank you!

[@travisjarrett2355]

You're welcome Nick. Thanks for watching.

[@donschofield4849]

Ya, great work! "The Best Entertainment for us CNC Lovers" Great Work For The Mind. WE WANT MORE VIDEOS, PLEASE. 20+ Minutes? Thank You.

[@Jon-O.]

Master yourself you are the greatest tool in machining.

[@DolezalPetr]

I have a dial test indicator that came with a small sheet of paper, kind of a manual and there is a table with some useful correction constants. If you have to tilt the stylus of the dti for some reason and you can not have it perfectly parallel to the workpiece because of an akward shape of the workpiece for example or because of some other reason but you can by eye roughly tell the angle of the stylus, you can look into the table and multiply the final reading you get with the constant you get for that particular angle and you get the correct number. So if you tilt it by eye to lets say 30 degress and you look into the table and find a constant for 30 degrees and you multiply your reading and you get the correct number. I dont know if this is a standart thing.

[@CatNolara]

Correct, I saw it a little differently though, maybe because my DTI is on the cheaper side. It was instructed to keep the lever at roughly a certain angle when measuring (NOT parallel) to get correct values. You also have to keep in mind that if the range of deviation you're measuring is kinda big, the angle of the lever also changes a lot, so correcting won't be as trivial. Luckily most of the time you don't care that much for the value itself and just want the needle to move as little as possible.

[@travisjarrett2355]

This is standard. Mitutoyo also provides corrective formulas for necessary increases in angle between the stylus and the workpiece.

[@travisjarrett2355]

@@CatNolara yeah that might be the case with some manufacturers and you should always follow their recommendations. And you are completely right when you are trying to dial something in perfect i.e. no needle movement. It does help to keep the cosine error in mind however if you are checking something like say flatness. Too much cosine error might cause you to spend time and money fixing a non-existent problem.

[@ProjectShopFl]

Great video! Love it when I learn something new.

[@tdg911]

Always great content. Very helpful video for me. Much love and gratitude.

[@travisjarrett2355]

Thank you my friend.

[@mohammedalbattal77]

The indicators are the eyes of the machinest if they were wrong the whole work absolutely is wrong Thank you Mr tarvis for this vedio And We are waiting for you for more videos that talk about the quality specialty that you excelled in, brother Boom 🔥

[@travisjarrett2355]

"Eyes of the machinist"; I like that. Thanks for watching.

[@austinloveridge656]

This is great, I'd love to see more videos about GD&T. I've had a hard time finding good information on things like true position and profile of a line/surface

[@travisjarrett2355]

Thank you Austin. We hope to add more like it in the future.

[@norbertfleck812]

It's always a good idea to buy indicators and callipers with protection level IP67 which means they are water submersible and can be flushed if they got contaminated with something.

[@zockerplay3314]

Thanks! Fantastic explanation for de COS Air. I was not aware of it how much it can effect your measurements.

[@travisjarrett2355]

You're welcome. Thanks for watching.

[@williamlind2843]

Great video!! I'm going to play this at my next team meeting, or present it myself!

[@UraniumFever88]

Great work Travis! Very clear presentation

[@mauromejia2548]

Gonna need a maintenance tips on maintaining them, I have a starrett and having used it in a while but the pin isn't sensitive as it was before.

[@wildin13]

I'm glad you talked about trig. Its often hard to understand it or its relevance. Even i don't KNOW trig but I took the time to understand it and how to use it, that has helped me alot! Everything from sine bars to 2D +3D vectors on our EDM die sinker and ofcourse including DTI's. Side bar, maybe you could add onto this information and show how to use these to take measurements, especially at the machine?

[@mattb6646]

Aslong as you can trig on a calculator you're golden

[@shaniegust1225]

Well done Travis! 👍

[@travisjarrett2355]

Thanks Shanie!

[@larrymashburn7789]

Instead of using the term standard deviation (when explaining indicators precision), I think standard graduation would be a bit more clear. Standard deviation may cause confusion especially in the quality world. Great info, and I wish I had this when I was getting my feet wet/drowning.

[@travisjarrett2355]

I had to go find it but there it is. Good catch my friend; I agree.

[@mattb6646]

We use spindle chuck mounts on our indicators, i would like to find a better one though... mine have certain loose points but there arent any knobs so its very convenient

[@phillyspecial1393]

I feel like I can smoke a blunt with this guy also while listening to his college level lectures all at the same time! Haha

[@poetac15]

Amazing content. Thanks!

[@davegill8634]

Awesome Info Travis 👍

[@BrilliantDesignOnline]

Actual note off my dial test indicator: Contact point can be adjusted 180 degrees by rotating arm axially when required, but axial line of contact point should be parallel with working face of workpiece or have 5 degrees or less of angle. After having mine for a while, I realized the arm was friction mounted, and could be 'forced' and swung along the axis for better positioning; noone had ever covered that.

[@chauvinemmons]

Most important tool when your toolbox is a damn file if you know how to use the goddamn thing

[@FelixT370]

Great video! Is there any video that would show how to indicate center line the drill or spade drill?

[@Yamototamto]

Very imformative... Now i dumbfounded because i was measuring this incorrectly. Our shop does not require tolerances tighter than 0.05mm but the error is an error. Thx for video Ill correct myself and all ppl I teach stuff in work... : O

[@gulch1969]

CoSine error is only when comparing 2 different heights, right? For instance if you have the mag base on your Z axis in a vmc, and you touch off the top of the part and then move to a floor of a feature, the CoSine error is non-existent?

[@travisjarrett2355]

It depends on what you mean when you say comparing two different heights. Cosine error is applicable when you are using the indicator only to determine absolute (actual) distances. I am assuming in this example you are using the travel of your z axis to measure a distance and the indicator only serves as a zero reference so no, cosine error would not be applicable in this case.

[@gulch1969]

@@travisjarrett2355 Yes that is what I was referring to. Thanks for the confirmation.

[@101south805]

Great video. What about the angle of the stylus even if square to the measured surface?I think 12° is recommended for proper use of most indicators.

[@norbertfleck812]

You mostly use them to align something. Therefore the absolute reading is not really important.

[@2112kustoms.]

There's another term in machine I cannot remember but it it comes from an air and reading it when you're not looking at the needle square to the face you're looking at it from an off angle. What's the term?

[@travisjarrett2355]

Parallax error. Thanks for watching.

[@emeraldhr]

whats the reason that rectangle tombstones are mostly oriented with the smaller surface facing the spindle at pallet change or table at zero?

[@ninjmaster5609]

Great explanation of the error And can someone tell me how you measure round shapes that are not perfect strait or complete round like the form of a vase or water bottle

[@NPerillo]

Maybe a dumb question. Could you use cosine error to amplify the effective resolution of relative measurements by intentionally tilting the probe? Probably not enough to be useful but I’d be interested to know if it works.

[@lucmartz]

Thanks Travis!!!

[@travisjarrett2355]

You're welcome!

[@peterensor9689]

Fantastic video 👍

[@yogeshkumar7402]

It is necessary & good tool

[@nathanthomas8184]

Travis works like a Swiss clock Dimensional attributes? Is that FEEL,COLOUR, SMELL, WEIGHT? TITAN keep on BOOMING on

[@travisjarrett2355]

🤣🤣

[@CSGATI]

Test indicators have a specific angle to be used at. Forgot the brand but 15 deg.

[@ramtinnazeryan]

I just realized by tilting the indicator at 45 degree angle I can double the precision of the device cause the plunger needs to travel twice as much to show the same value. Am I wrong?

[@sawaab.a3756]

does it matter if the base of the mag sits on a flat surface i use them in cnc lathes and sometimes i don't have a flat surface to mount it on

[@brandons9138]

Not really. The orientation of the indicator at the point of measurement is the key. Of course if the base is not secure in it's position it can have negative effects on the accuracy of the measurement.

[@sawaab.a3756]

if u are mesureing runout while the part is in the machine cosine error doesn't matter right?

[@travisjarrett2355]

It could depending on what you are looking for. For example, if you needed a runout of .002 (.05mm) or less and you had a large amount of angle in your stylus you may get a reading that says your part is out of specification when it is not and consequently spend a lot of time and energy trying to fix a problem that doesn't exist.

[@Pradeep3083]

From தமிழ் நாடு Tamil nadu

[@The4stro]

one guy told me once that if i can measure, then i know 3/4 of machining

[@JSomerled]

Your only as good as the final dimensions..Measuring is critical.

[@irishful1]

could not make out if it's cos air or error. had to google it to find out its error

[@MrSteveswain]

First haaa 💪 Have a great day everyone

[@mackk123]

_for reference use only_

[@lordbartosz9416]

nice nbut more examples would be nice

[@Jon-O.]

Really Mititoyo and your supposed to be about American made. I'm sorry Mititoyo is good quality but my Starret outlasted them all including the world renowned Interapid but at Interapid pricing BUY AMERICAN STARRET. THEY ARE THE BEST.

[@Tresca990]

I hope to join u😊

[@norbertfleck812]

When will you finally adopt the metric system? The dial indicator scale then is 10 Micrometer or a hundredth of a millimetre. There's no sense to multiply everything by 25.4 and call it an Inch.

[@mattb6646]

My heart sinks everytime a drop of collant lands on the face of my indicator 😫

[@satchelsieniewicz5824]

its not as parallel as possible its 12 deg like that's hows its calibrated

[@travisjarrett2355]

This is manufacturer dependent. In Mitutoyo's case it is parallel. Thanks for watching.

[@itsme4g63dc8]

It's funny nobody gives a shit about anything inspection related since they "don't make money" but once it's time to give a tour for SpaceX it's "come and check out our inspection!"

[@tanner3801]

Metric persuasion may have just become my Japanese wife's new nickname 😐

[@Defender_928]

Why i dont like inches"😵😵

[@brandons9138]

Metric indicators suffer the same problems. It's not specific to inches.

[@tommytwotimes2838]

Zero movement because measuring the air haha, check the video

[@KayaKingg]

C.N.C asmr pls

[@rickyhammer6832]

Thought all the Best use interapid? Lol

[@ericszanti327]

Interapid ! 40 yrs old ..perfect !

[@Everythingwentblack69]

I know it’s crucial in this industry but being 100 thousands off doesn’t seem like it would make a difference

[@jmowreader9555]

Are you thinking 1/100,000 off? “One hundred thousandths” is a tenth of an inch. You should be able to get closer than that just with the naked eye.

[@Everythingwentblack69]

@@jmowreader9555 yes I would be, thanks for correcting me.

[@santee6399]

I can't get past the gloves. If you wear those longer than 15mins you'll have dishwater hands

[@mikecurry3679]

Question! How is there a .01" difference between .125" and .1135? Lmao... the cosign errors were MORE accurate than your linear measurements...

[@mikecurry3679]

The ACTUAL difference is .0115"... so I pose this question to you. Which is MORE accurate to the TRUE difference between .125" and .1135"? .01" or .012"?

[@travisjarrett2355]

The blocks used were a .125 and a .135 Thank you for watching.

[@mikecurry3679]

😂 Thank you for clarifying that for me Travis. I must have had a spell of dyslexia while I was watching. Very embarrassing! Makes more sense now, as originally it kind of hurt my brain. .013" difference between. 125" and .135" from being out of perpendicularity on the needle to surface I understand. Not sure how I heard .1135". Thank you for the great vids!