ULTRA PRECISION REPEAT O METER

I needed a quick and dirty repeatometer for my surface plate lapping project. Then I realized it fit the requirements of the Spareroom toolmaking competition 2018 by Emma. So with a 20 minute limit I tried to capture all the fun.
Paypal donation www.paypal.com/cgi-bin/webscr...
Support through Patreon / robrenz
I am "robinrenzetti" Instagram lots more content there!
Emmas competition entry playlist • THE TOOLMAKING COMPETI...

[@EdgePrecision]

We always had a saying in the machine shop. If you cant make it right at least make it look good. Or better yet make it right and look good. If your a machinist that does this for a living when your part goes to inspection if it looks good the inspector will always have a better attitude. Or the converse of that he will find something to reject on a shoddy looking part. It only takes a little care and effort to make a good looking part. Awesome instrument and video Robin!

[@StefsEngineering]

Really nice repeatometer! As always enjoyed watching your video's. About a week ago I had a discussion with someone about people that introduce themselves as beeing "the expert" and how I dislike those people. I told my friend that a real expert doesn't have to explain he is, it shows by his work! After that I showed a couple of your video's and used you as an example. With this video you have proven it once again! Thanks for the time and effort you put in the video and sharing your knowledge Robin!

[@TraditionalToolworks]

Setting a new standard...accurate to a "renth"! Well done! 👏 💪 👍

[@warrenjones744]

Wait till Tom Lipton sees this thing! You will get a bazillion of his style points for the design elements and finish. I have tool maker envy all over again. Well Done sir.

[@mirceabascuti]

Nice work and design as usually from a top notch craftsman. Robin, the only thing I don’t see is your logo or manufacture signature on the tool you made. I think your brand will be really appreciated over the time, as it is now, but without a way to prove the provenience would be hard to authenticate... Thank you for sharing your knowledge and high end craftsmanship that inspire so many people.

[@lalmuanpuiamizo]

I'm into electronics, i know next to nothing about mechanical engineering. But your work, this level of precision always amazes me. You're awesome

[@SteveSummers]

Very nice work Robin. Looks like a tool that was made by a professional. Because it is.👌 Thanks for sharing. Your work always makes me want to step up my game.

[@wnebergall]

I am taking a metrology class now at 56 years of age I now have a greater understanding of what you do Can't wait for more tool building videos Thanks

[@DudleyToolwright]

My favorite part of this project is that your "quickie" project, would be, if completed by myself, the best thing by far I had ever done. Fantastic work.

[@mikestabile0526]

9:35 "ahhh... there we go" So satisfying!

[@Factory400]

The slotting and dovetailing trick is a true gem. Make your Bridgeport a mini-shaper. If you did not show that, I would be guessing for a long time how you pulled that off.

[@unclespicey42]

That is simply brilliant. You know, now I have no choice but to make one for myself. I hate it when people make me do things I did not plan to do. If I were you I would patent it.

[@pierresgarage2687]

This is an amazing tool, simple and deadly efficient... All the othr entries on Emmas contest will curse you from this moment on... lol Something I may seriously consider, as soon as both my parents stop requiring so much special attention, and, also all the other projects that are waiting in the queue... So much catching up since the last 3 to 4 months stall... ATB, Pierre

[@ROBRENZ]

You are doing what is really important! Seasons of life. ATB, Robin

[@quintinsmits]

I am not a machinist, but I play one in my garage. Every video of yours (and some of the other engineering/machining channels') I see adds to my list of things to try, build or buy. Thanks!

[@randomdude1786]

That dovetail tool stole the show for me all the rest was just really really good! Thanks robin you never fail to entertain

[@EmmaRitson]

thanks for the comments on finish and detail. and thans for entering the competition, its much appreciated.

[@CyclesInc]

CyclesInc 1 hour ago I have three favorite KZbin channels on machining, because of intelligent approach, technique and experience. You are definitely one of them. Tom Lipton and Joe Pieczynski are the other two. I love to see all these qualities in action. You guys stand out from the rest. I like and watch a few other channels but not for the same reasons or experience.

[@xenonram]

Robin is so proud of his Chamfer Meister.

[@literoadie3502]

I’ve never seen a nicer looking tool, actually a nicer looking thing, ever.

[@ajtrvll]

It looks futuristic

[@CapeCodCNC]

Elegant simplicity at its finest. A true work of art. I love watching a true master craftsman at work.

[@JohnCasale]

Awesome video Robin! Would love to see you put together a video about slotting on the bridgeport.

[@MatthewRulla]

Yes, more detail on the slotting operation. Tool grind, stepover, etc. Please!!!

[@MrJugsstein]

Its 1.00 in the morning and Im up to watch your work. Still worth it 👍

[@mikemichelizzi2023]

Some of the comments use the word 'elegant' and I think that's one of the best ways to describe your work. I especially lovethe dovetail cutter! Thanks for sharing!

[@curt149k]

That is an elegant design Robin.

[@aparrish47]

Beautiful work as always. Thank you for taking the time to share.

[@MinhasA]

great design and build! cant wait for the next surface plate episode

[@unknownapprentice625]

When you are inspired by some great purpose, some extraordinary project, all of your thoughts break their bonds. Nice work repeat-o-master craftsman 🦉

[@PracticalRenaissance]

So much to learn from this design, wonderful work thank you Robin!

[@thecogwheel]

And another exceptionally interesting part comes out of NASA's Jet Propulsion Laboratory ... I mean Robin's shop. Thanks for taking the time to edit and post.

[@kibi15]

Very nice Robin. As a fellow EEVblogger, it was your Kelvin clips video a few years ago that tipped me over the edge and made my buy my first lathe, I think I was also inspired to buy and restore a Fluke 8840A. Thank you for that, never looked back. Your workmanship is always inspiring to me, your attention to the finer details is amazing.

[@ROBRENZ]

Thanks very much, that is great to hear! Thanks for watching and commenting

[@matthewklein9225]

A significant amount 5 or 10 thousandths Love it

[@yawpaw9796]

You are solving a huge problem in the fine arts realm. Flatness. Edit: thanks for showing how to make the tool. Your support is HUGE to industry at large

[@jimmilne19]

Art: with a refined function. Beautiful.

[@MakinSumthinFromNuthin]

Really nice machine work as always Robin. Nifty work on the dovetail ~ Richard

[@bcbloc02]

I was wondering how you cut that dovetail when you mentioned it, since it appeared blocked form spindle access. Nicely done with the shaper/mill trick! My G&L manual shows using shaper tools in a boring bar and planeing with the table.

[@StraightThread]

That is pure elegance, Robin. It has only the elements it needs to function, each in its simplest form, and not a thing more. Brilliant the way you carved it from a single piece of material. That and the attention you give to details elevates it from a kludged together one-time tool to a piece of art. Brain and eye candy. Always a pleasure to look over your shoulder and hear you explanations. Thanks for sharing.

[@billdlv]

Great work Robin, outstanding design details.

[@dimitar4y]

I love these kind of one-shot designs with such simplicity!

[@arnljotseem8794]

Great video Robin. Tons of tips as always.

[@magicponyrides]

This is the channel I've been looking for.

[@moeszyslack4676]

Outstanding, as always. Thank you for sharing this.

[@blacksupra10]

masterful as always, thanks for taking the time.

[@ShadonHKW]

Looks great Robin, fit, form and function all brought together!

[@63256325N]

Brilliant! A *well* built tool! Thanks for the video.

[@ProfRonconi]

Amazing stuff. I can't thank you enough for producing these videos.

[@ActiveAtom]

You do really nice work we are happy to be here to watch you share precision fine but with great pride.

[@wlogue]

Just incredible... thanks Robin!👍👍

[@christurley391]

Nice tool Robin. Looking forward to seeing it in use.

[@longlivepunk]

Beautiful, Robin. Great work and attention to detail as always. It's funny how a great example of the art of simplicity can have so much detail to it. I mean, it looks very simplistic at a glance, but the lines following the angles of the indicator, the indicator mount being angled to have it sit at a pleasant angle, the edges put on the carbide feet, the corner-rounding, cable-tie bosses... Love it. I may have to try my hand at making one to work with my lowly tenths DTI until I can afford (and have the skill to make use of) an electronic indicator.

[@homemadetools]

Great build. We shared this video on our homemade tools forum this week 😎

[@TheSwagga69]

Your a true precision master. Thanks again for sharing

[@billlee5307]

Delicious tool making!

[@kevCarrico]

wow! phenomena stuffl! this is all new to me and yet you make it greatly understandable... with amazing lap harmonics! thank you, rob!

[@lancebaltzley4770]

As always, you never fail to impress.... Once again thank you for the content and giving all of us some "considerations" to shoot for!!!! You are really an artist, looking forward to more in this project progression.

[@RPMoore55]

Your attention to detail is amazing. Thanks for another great video.

[@Neo7CNC]

Great project and video Robin. I love your attention to detail.

[@nowayjerk8064]

such a pleasure to see your work thanks for sharing !!

[@1jtolvey]

GREAT VIDEO !!! FANTASTIC REPEAT-O-METER !!!

[@Mike-sp7ru]

I really enjoy your stuff, and I learn a lot. Thank you

[@christopherdonius1215]

Beautiful elegant design !

[@JBFromOZ]

Thanks for the construction footage! Very nice execution of a lovely tool cheers mate!

[@JoeKlaas]

like the tips on the final touches, will definitely implement them

[@cdbflynow]

A superb design and masterful execution. If there was a mechanical arts equivalent of the Emmy Award your meter would be my choice for that award. Paul

[@judge743]

Wonderful work, Robin. Thanks for sharing.

[@CraigLYoung]

Kudos! Love the simplicity.

[@lyntonr6188]

Great video, always so much to learn from you. Thank you for taking the time to make these videos and pass on your knowledge to all of us.

[@mog5858]

thanks for the finishing tips. your right little things can make a huge difference. keep up the good work

[@Phantomthecat]

That's just brilliant. Functional and beautiful. 👍👍👍

[@jimliechty2983]

Great video,tool,and workmanship! I love my Roll In Saw ...Thanks again for the help!

[@wotnoturbo]

Stunning - looking forward to seeing it in action

[@doscucharas]

Holy crap, a work of art!

[@ThrowingItAway]

Sometimes making the tool to do the job is more fun than the job itself! That is a very nice build

[@bugrobotics]

Excellent! Thanks for sharing.

[@xDevscom_EE]

It's a beauty, thank you for sharing!

[@davidcolwill860]

Fantastic! I'm liking the flextures. I must try this. Many thanks for sharing.

[@philgarbarini9645]

Wow. Really impressive work. Thanks for sharing.

[@OldIronLover]

Fascinating. I do love the attention to detail.

[@ajtrvll]

Almost mesmerizing... a little like Clickspring or Stefan, but with a hypnotizing accent.

[@rickholmwood2000]

I love your videos sir. You are a very smart man. Thank you for sharing all these cool projects you create

[@TAWPTool]

Phenomenal Robin! Thank you!

[@3rcamera]

Super! Well done and thanks for sharing.

[@denniswilliams8747]

Thank you for showing a shop made tool that is capable of extreme accuracy.

[@mrtomsr]

Excellent presentation. Always new ways to measure and to learn.

[@davidwootton683]

Brilliant! Thanks for sharing this with us. Kind regards and greetings from Africa.

[@oakenarbor2046]

Elegant solution executed to perfection. A joyful experience for all of us. Many thanks!

[@OO-xc7zg]

Stunning! 👍👍

[@johnbodmer5645]

Fantastic design for a Repeatometer Robin. I love the simplicity and beauty of this tool. Thanks for sharing.

[@eduardorosales1959]

Simple. Beautiful!

[@mrcpu9999]

Just darn good stuff. Thanks for sharing it.

[@nothermarkgnomex]

Beautiful work and an elegant solution. It seems every time I watch one of your videos I learn several subtle things that make sense once I think about them. Thank You for showing us and the explanations!

[@sixty3impala]

Inspiring project. Great work.

[@deanharris7149]

Wow. Outstanding

[@RRINTHESHOP]

Wonderful work Robin. Great video, I want to make one. Why, just because. Beautiful and simple.

[@JPGuay]

Outstanding !

[@cellularmitosis2]

Beautiful work!

[@wileecoyoti]

My first thought was that since the end effector has a flat ground in, when it swings on an uneven surface the flat section of the pin would no longer sit flush to the surface... Hopefully that sentence makes sense. Anyway I did a little "back of the envelope" on it and came up with this: if the distance from the center of the pin to the pivot is 5" (random guess) and the surface deviated by 0.001" (probably more than your intent) then the angle at travel is 0.0115°. The "error" between the center of the pin vs the contacting edge of the pin, if your flat is 0.25" (also a random guess) will be 0.000025", or 2.5%. This probably isn't enough to care about but does illustrate the advantage of round pins. An alternative would be to use a "double wishbone" type flexture that would cause the end effector to travel vertically rather than swing. It would displace the effector front-to-back slightly when raising and lowering, so the contacts to the plate and gage would need to be perfectly parallel. Either way love the project, it's simplicity, finish, and function. The accuracy is way beyond what I'm achieving. Big fan of your work!

[@ROBRENZ]

Thanks Ryan, The spacing is 5.5" and I don't plan on anything above .000050" repeat reading. So that is 1.875 arc second and with a foot that is .094 wide that is 0.0000009" height difference between the two edges relative to the line formed by the other two feet when deflected 0.000050" But in reality the foot probably sits relatively flat to its resting spot since the surface is somewhat sinusoidal in nature not stepped. Thanks for watching and commenting.

[@kierondesmond7791]

That's what I was going to say but you beat me to it. Also you might have said it a little better ;o) Thanks for showing us mortals how it's done. I think even Dan Gelbart would be impressed. Now I've really got to get back to assembling that cheap bench drill I bought 5 years ago :D

[@bobgodburn5874]

If anyone doubts what you bring to the table when you design a solution to a mechanical problem, all one needs to do is look at the difference between Robin’s repeat-o-meter and the store bought variety (Tom Lipton did an excellent critique on the design). Beautiful piece of work, Robin.

[@SpencerWebb]

Beautiful work, Robin.

[@zephyrold2478]

Hi Robin, allways a plesure to watch your videos, nice your are not afraid to give your tips away, a good rounded of thumbs up, all the best.

[@peterblake548]

A very outstanding design brilliantly executed - Thanks so much for sharing it wit us.

[@ROBRENZ]

Many thanks!

[@braxtonec]

Thanks for sharing this elegant design. Your finishing tips will improve the quality of my work.