Shop Math and Grinder Ergonomics

Looking at the math used to measuring angled faces and a tip to save your wrist some discomfort

[@brovolde]

I get excited whenever I see you posted a new video because I know that I'm going to learn something. Great video, please keep them coming!

[@somebodyelse6673]

Your visual aids are great, I like the aesthetic of 'handmade' on the topic of precision math. More importantly, being able to see the geometry of a setup and identify how to get what you need from what you have, is the troubleshooting skill everything else is built upon. If you can't sketch it, mentally or on paper, you're going to have a bad time with it.

[@StefanGotteswinter]

Thank you for the video! Also for the comment at the end. I feel seen, I usually go the lazy way of solving problems in cad. I should go back and do it more often by hand, just to not forget about it and keep it fresh in my head. Also: Love your way of illustration.

[@Kallinenjp]

To the comment at the end, I think it is valuable to at the very least know the method of hand calculating these problems. I know that my "experimentation" with solving problems like this has given me a lot of insight into the relationship between features. Thanks for the video!

[@Bob_Adkins]

For precision angle fixtures, my production shop used to specify a drilled and reamed .250 tooling hole referenced off 2 ground square edges. Then the draftsman could specify a distance from the center of a precision .250 dowel pin to the ground angled surface so it could be easily checked. It wasn't split tenth accurate, but good enough for +/_ .0015. There must be a phone app for that type of dimension now, but it's very good to know how to pencil-whip it.

[@StuartsShed]

Nice explanation. Your comments on machine shops at the end are absolutely accurate. There are plenty of shops making very accurate and high quality parts with older equipment. Even in modern machine shops machinists typically do not have access to computers and CAD. I think you begin to understand your set up more, and also the potential solutions, if you can think through the trig and geometry rather than sketch it on a CAD system. That said, I use CAD plenty routinely to solve problems - but I feel smarter if I can do it with just mathematics. Thanks for the video.

[@kevin_1979]

Amazing. I'm an instructor at a community college in NC and am now a subscriber to your videos.

[@emilr5815]

I saw the video with NYC cnc a while ago and enjoyed the shop tour and your process. Sounds like going on your own is working out, glad to hear it. I'm glad I'm not the only one with, what i call, is a mental block on trig formulae, don't trust my memory. At my desk have a cheat sheet up for simple angle calculations and I turn to the handbook, the good book, when I need something more complicared. Anyway thanx for the videos, nice communicating.

[@supahonkey]

Thanks for the video. I own a large shop with a complete grinding room, tons of manual machines and another building full of old and modern CNC machines. It's hard to find good machinist, but even harder to find a grinder who can run an internal, external, surface, centers and a jig grinder. The nice thing about using CAD is that it will potentially prevent math errors, but of course you have to sketch everything correctly as well. Thanks for the videos!

[@Dellpodder]

I'm not a machinist but I love your videos. The quality of your paper illustrations is top notch; very clear and helpful! I appreciate the attention to detail adding reflection lines to the indicator tip!

[@johnnason7019]

Even if you have access to a computer it's really nice to be able to confirm it, it takes the mystery away.

[@DudleyToolwright]

well done, Adam. Your tips are invaluable.

[@electricburning]

never ever watched something like this! happy that i found this channel

[@ReubenSchoots]

Adept communication, Adam! Another great video. Cheers, Reuben

[@number2664]

Ergonomic points of view will definitely help me. Thankyou

[@Factory400]

I am guilty of solving these types of problems on CAD. The problem is that I started losing 'intuition' As I started going back to doing longhand paper solves, I am better equipped to to 'see' the problem and the solution. I am faster overall since most machining is a bunch of small problems that you are faced with in sequence. For complex compound situations, I still use CAD. I would encourage the audience to consider taking time to work out problems like this longhand. Google the trig, do some exercises, etc. You will be a little slow at the beginning - but in the end you will be faster than those that rely 100% on a computer.

[@xl000]

I agree. The trick is -- in CAD you cad model arbitrary complex constrainst, and the constraint solver will work for you, with no error.... In CAD you can visually check the validity of the model -- it's much less error prone if you're not that much into trig.

[@Rosini2222]

Would love to see more videos like this for those other formulas on your cheat sheet.

[@rayp.454]

Thanks for the great videos Adam. Your channel is unlike any others. Your eye for precision is over the top and an inspiration.

[@joell439]

Fascinating setup and inspection - thanks for the lesson. Your visual aids are fantastically simple and astonishingly clear. Thank you so much!

[@steelcannibal]

Quickly becoming one of my favorite channels! Thank you for doing what you do, and how you break things down.

[@DrKnow65]

That was clearly communicated and very informative. I appreciate the effort you put in to teaching me something very useful today :)

[@johngriffin618]

Just found your channel, already binge watched everything. Your channel is going to explode if you keep the videos up :) I really appreciate the knowledge, it can be hard to come by from people that know things on a fundamental level like you.

[@nathanandress]

I recently dusted off my trigonometry hat to figure out a way to "show my work" for an analysis at work. I needed to do this to prove that the results were the same as what could have been derived through CAD or metrology software. At the end of the couple of days it took me, was it worth it? Probably not, but it kept the one person who would have asked the question quiet. But I agree with Adam here: I can't emphasize enough to keep your skills sharp by doing it, over and over. And if all else fails, draw a picture.

[@goransolheim8772]

i love that you show all different levels if manufacturing depending on the part and process great vid

[@brucewilliams6292]

I appreciate your taking time to teach us these skills.

[@jaredwalton567]

Very clear and straightforward explanation. Thank you!

[@ryebis]

Yaay for more interesting math, thanks! and I see you got a new mic, audio was great :)

[@outsidescrewball]

Enjoyed…tks for sharing

[@theunfrailhale]

Thanks for sharing your know-how. I'm on the beginning of my machining journey but this kind of stuff seems it will be formative in how to think about precision work.

[@ROBRENZ]

Good stuff Adam! ATB, Robin

[@simpleman283]

I have been studying trig & I would be most interested in the math you used on that compound chamfer video a couple weeks ago. I could watch a whole video of just that math explanation. I'm starting to really like this channel.

[@James-fs4rn]

👍 great content! Math is a part of the trade people get over it. Subscribed.

[@ErikBongers]

That cardboard explanation is excellent. Very intuitive.

[@Kallinenjp]

YES! Loving the content Adam!

[@williammills5111]

Thanks, Adam. Another gem, keep them coming. ATB, Bill

[@edpopelas2844]

I admit I’m a excel junkie. I’ve found it super useful in calculating long measurement problems. I’ve had several occasions where knowing tolerance stack up is necessary for a successful end result. However, it is good to keep sharpening the pencil too.

[@bulletproofpepper2]

Thanks for sharing! I will have to try that.

[@yousef7033]

Wonderful video

[@johncarey9149]

First things first, I'm not a machinist, and never will be, so watching the video, right from the first few seconds, I was thinking that I'd just draw the "problem", but that's what 30 years of using Autocad of a daily basis will do for you ... 🙂 That said, in you summing up, you mentioned having access to PC's but you mentioned using a spreadsheet for doing the calculations, which requires some computational device, be that a smartphone, or a PC. Please don't get me wrong, I'm not wanting to be overly critical, but given the accessibility to "tech" in this day and age, I honestly believe that the days of the programmable/graphing calculators are definitely numbered. All that said, thanks for another interesting video, I look foreword to the next video ... 🙂

[@roseroserose588]

I really appreciated the blown up drawings to show how the setup works, also the real world examples of how you'd use it really made things click. if your goal is to improve your communication then for me you're nailing it (:

[@roseroserose588]

When I was a phd student for a short period I was teaching first year students the module that i barely scraped a pass in😅

[@MrMoeRod]

'Cheat sheets' aren't a crutch, they are a tool... You wouldn't memorize the machinist handbook so why memorize all the math, folks!... Thanks for the great lesson, Adam!

[@LetsRogerThat]

Adam, thank you. I have zero trig math education and struggle with all math concepts, so I automatically resort to physical measurements rather than bust my head trying to calculate anything. But I am willing to face my lack of education by practising the skills you so kindly share. I will keep trying to figure out this math stuff. thanks. Gilles

[@msawhill]

I hope it takes you a long time to improve your communication skills, because I’d like to see many more of your excellent videos! I’ve never seen a KZbin video covering the care and use of precision surfaces (spindle faces, collets, vise bases, surface plates, etc.). It may seem obvious, but from the wear and tear I see on equipment, it seems a lot of machinists don’t have good habits in this area. Maybe it’s a topic on which you could share some insight.

[@alasdairhamilton1574]

Thank you 👍🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@jsihavealotofplaylists]

instant sub. love this stuff. educational

[@richharr]

Awesome! Thank you

[@cooperised]

Really like the idea of choosing the right size gauge pin as a reference. I guess you have to be careful that the radius of the pin doesn't exceed the height of the fence on the end of the sine chuck though?

[@eulerizeit]

As a mathematician my biggest suggestion would be to guestimate before calculating. When my solutions aren't close to my guess I stop and double/triple check that I chose the correct formula and or didn't screw something up.

[@jimmyp6443]

Sally can tell Oscar had a hang over always

[@OhHeyTrevorFlowers]

Regarding your last comment: I know of a shop that just recently retired a tape-driven NC and only then because they couldn’t find replacement parts! It was still cutting well after decades of use. So, yeah. It’s best to know the manual methods in addition to CAD/CAM programs.

[@NeoQJ]

🙏thank you

[@sleddarcheddar]

Using a ti-85 I'm surprised you haven't made some basic programs to do these functions easily. I have a ti89 that I have done just that. Super awesome time saver.

[@adamthemachinist]

I do have such programs , but I figured I would do it out long ways for explanations sake

[@sleddarcheddar]

@@adamthemachinist right on!

[@1008chaz]

Could you do an episode on feeds and speeds?

[@Bigwingrider1800]

Haven't done that in 30 yrs. Draw it in cad in minutes and measure. 7 places out.

[@95dodgev10]

I pretty well suck at math as well. So i cheat/use what works for me and i will draw something such as your pin example on fusion 360. Once i have the 2d sketch i can then let it do the math for me and simply dimension as necessary.

[@Proud2bmodest]

A simple exercise to prevent wrist pain is to make a fist and hold for ten seconds, relax for ten seconds, splay the fingers as much as possible for ten seconds, relax for ten seconds. Repeat the previous ten times.

[@100899wot]

Очень хорошее объяснение.

[@flatsurfaces1913]

Could you do a video on the step grinding squaring that you showed on instagram a while back. I tried it today, and it worked but it took me a while to get it to be consistent a d I was still only able to get 60x40x80mm block to about .004mm squareness all-round. Is there a formula for how much to take off to "rotate" the block? I ended up relieving the centre and grinding the 2 legs to square it.

[@adamthemachinist]

It’s usually approached by determining a out of squareness per inch/cm and applying that amount to the errant face . Keep in mind , with this method the squareness can only be as good as the flatness and parallelism of the parts 6 faces

[@josephcitizen4195]

Is it bad that I haven't used or owned a scientific calculator in 25+ years? If I had to solve this problem I would draw it in CAD and let the software do the math. I loved math/geometry/algebra in HS and that's what led me to engineering but It's faster and easier to draw it up in CAD. edit: meant to say, I DO appreciate the explanation thought. I love the channel. Keep it up! edit 2: haha, I commented above before I watched to the end. I have a bad habit of doing that. my apologizes.

[@jophry]

How did you find this career? I know how I got to where I am and it was never discussed in high school, I just discovered it as I moved into adult life looking for full time work. I think I am asking what is the path a student would take to get to where you are now? Let’s say beginning in grade 10.

[@adamthemachinist]

I would check with your states labor board and find out which local metalworking companies have an apprenticeship program and try to get in at one of those . You’ll do a 8000 hour on the job program and 2000 in class room hours probably, and come out the other end as a decent toolmaker or machinist . Another few years in a few different specializations like edm or jig grinding and you’ll have a wealth of experience and classroom knowledge

[@firebird3542]

I'd say you're overcomplicating the calculation. The distance between the angle and center of circle can be calculated using Pitagors theory, so c= square root from 2r^2 and the just add another r to get the top of circle. Correct me if I'm wrong, I'm no maths expert 😅

[@dudelookatree]

I see you splurged on the pro edition of cardboard cad :)

[@everettowen3016]

Is having a "Manufacturing Hole" not a common thing in the grinding world? Where I work, whenever there is a custom detail with an angled surface whose height is important, we add a manufacturing hole so you can measure the surface to a gage pin using a tool probe or depth micrometer while still loaded in the machine.

[@adamthemachinist]

Occasionally you see them, really depends on how much accuracy the customer is looking for . A gage hole like that is only as accurate as the level of fit it has to the pin so it ends up being easier for use to just take the same pin and set it in the corner of the sin chuck and depth mic down to it

[@samroesch]

First 🤪

[@adamsblanchard836]

Yeah like i did it.... Great advice!👍so wtf i don't have all that shit for?? I'm just playing, i know why... !@#$^/& f@$0t m phs dats y... Hahaha hurhurhur hahaha ah ha uh huh ah hah hahaha hurr hurr HA!! Stop