DIY SURFACE PLATE LAPPING ANSWERS TO PART 1 QUESTIONS

Answers to questions posed in the comments of DIY SURFACE PLATE LAPPING PART 1
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[@barrygerbracht5077]

Humble and brilliant. Talk away. Anyone who can't be bothered to listen is missing out.

[@StefanGotteswinter]

Didnt fall asleep, but watch it twice :)

[@mikegoodman4133]

Not boring at all. I love how you talk of your practice with such care and precision. You clearly measure your words with same care as you measure your surface plate.

[@terrycannon570]

Robrenz it is the educational kind of Yacking. Not boring to me at all. I'm always in the mood to listen to you and learn from you. Thanks for taking your time to help us learn.

[@SteveSummers]

Thank you Robin. I enjoyed the talk just as much as the actual lapping 👌👍

[@ROBRENZ]

Thanks Steve and thanks for watching and commenting, ATB, Robin

[@jimmilne19]

Wow! That was a fast half an hour. Your humility before the alter of striving for excellence is heartening, and in my sight, laudable. The humble mind is open to learning: the person who already "knows" already knows and can not learn except by accident. You have a fortunate son who most certainly has a fortunate father. And, thanks for sharing.

[@ROBRENZ]

Thanks for the very kind words and thanks for watching and commenting.

[@PeteBrubaker]

I would love to be your apprentice. Thank you for sharing your knowledge Robin. You think you're not an expert, and your reasons are fair (and modest,) but to many of us you are.

[@ajtrvll]

Renzetti apprenticeship: take a number, Brubaker! 😉

[@ianjoubert7505]

+1

[@PeteBrubaker]

Damn, there's already a list?

[@HaraldFinster]

the shortest 34:02 minutes video I ever watched - just excellent - thanks a million for sharing your thoughts and knowledge

[@nraynaud]

You are the perfect example of youtube recommandation gone awry, I was just watching a perfectly reasonable Keith Fenner doing marine shafting and general "a few thou" reparations, and now I'm here watching an extremist spending hours discussing diamond grit sizes, temp gradients and millionth's of an inch. Thank you. You are giving information for cheap that was before only in very available in expensive textbooks.

[@ianjoubert7505]

Robin, please, please please dont let the people out there that always know better get to you! Me, and I'm sure many many other people gain some knowledge from what you are doing! And if, there is a procedure that you practice that I dont agree with, its my problem, not yours!! Thank you very much for the time you take from a busy schedule to make these videos! Much appreciated Ian

[@oxtoolco]

Are those special toolmaker olives? Talk to you soon. Tom

[@r.j.sworkshop7883]

Thank you. All I could focus on was the label on the top! I want to know how much they cost, and what store still individually prices cans! Sorry, I'll be quiet now.

[@ROBRENZ]

Popeye had Spinach for the tough spots, I have olives :-) ATB, Robin

[@ajtrvll]

Popeye also had Olive Oyl for the tender spots 😉

[@ianjoubert7505]

Ahhh mr Lipton, when can we, the viewers, expect a new video from you???

[@ajtrvll]

YES... you are missed, Mr. Lipton.

[@arnljotseem8794]

Thanks for taking the time Robin, to explain and enlighten us on the nuances of lapping and precision. You are very humble regarding your knowledge and your expertice. In my book that makes you some one to take knowledge from. So many cocksure people out there not knowing one thing from the other. We're about the same age (well you might be a bit younger), and in my engineering work I always felt that other people in my trade was so much better than me. That just made me work much harder to learn more, and to be better. It never stops, there is always more knowledge to be found. In short: I like your style, and I enjoy listening and learning from you

[@iantaylor5579]

Allways educational, allways informative, just keep it up Robin, many thanks

[@chichcnc]

You realy have excellent skills and knowledge. There is far too much skill, craft and knowledge being lost in our trade and I thank you immensely for sharing your video's with the world.

[@johnbaldacchino7731]

EXCELLENT VIDIO AGAIN WELL DONE ROBIN KEEP THEM COMING

[@SolidRockMachineShopInc]

Hi Robin, I really enjoyed the video. You have a gift for teaching and I appreciate your willingness to share with us. Steve

[@ROBRENZ]

Thanks Steve, I appreciate what you share also. ATB, Robin

[@jefferdman5921]

Your technical understanding of the various processes involved in getting the results you desire is well above my pay grade. Needless to say I am educated every time I watch your videos. Thanks Robin for another good one! I learned a lot from your explanation. Appreciate your humility!

[@SteinarNor]

You are a VERY humble man. I really enjoy watching your videos. You clearly have a lot of knowledge about many things, I especially like your attention for details and ability to take all those small things into consideration. I really look forward to seeing the end result of your surface plate journey. Best regards Steinar

[@chrisj4570g]

Loved the video! It's odd, some people (NOT me) like watching folks dribble a basketball up and down the floor. I like watching a guy rub a chunk of metal on a chunk of rock to make the rock flat, and explaining the process.

[@terrycannon570]

Amen

[@duobob]

The sharp carbide buttons are a great idea, but if you use them, make very sure to slide the tooling on the plate carefully and using the proper technique -- every time (of course, we should be doing that already...) If not, there will be little chips taken out of the plate by the sharp corners.

[@stevecanny1583]

This was super enriching Robin. I had (almost) every one of those questions at least somewhat in my mind after watching the first video, and it really multiplied the learning experience to have you walk through. I'm so grateful to you for providing this resource. I'm down for watching whatever you put up, but this one was a very good choice, content-wise, in my view :)

[@robmckennie4203]

I swear I've watched the first video 3 or 4 times, can't get enough!

[@karlsorensen3214]

This is ridiculously informative and entertaining. There is so much going on. So much of it is non-intuitive if not informed by facts. I love your videos. Thanks so much for the insights and information!

[@DawidKellerman]

Oh you also had to re watch to just have all the info settle

[@davidmoore5021]

I appreciate safety measures that you take, and the good example you’re setting. I’ve seen guys not wearing safety glasses while op a machine or they’re walking around their in flip flop. You rock sir.

[@riversvic]

Great comment on the sharp carbide feet, I may never lap a plate but I love the little tid bits like that I learn from you.

[@ascedorf]

I find myself looking forward to the next episode in this series as much any episode of 24 / Dexter / etc ever did, and your content holds my attention completely. I am sure it was probably not planned but tantalising us with a description of the "RenzoMeter" in ep1 and a glimpse in ep2 has left me salivating for the full explanation. great work + thanks.

[@terrycannon570]

Ascedorf a I am always waiting patiently for the next episode also. Like a few others on here he is teaching something that is unique . After watching thousands of milling machine and lathe videos it is like watching everybody bake the same cake over and over again. I love seeing him on the surface grinder. An old tool and die maker that worked for me used to tell me that grinding was the most efficient way to remove material. Robin has demonstrated this in some of his earlier videos. He certainly has earned my respect and attention.

[@longlivepunk]

Great video as always, Robin! I actually went by my old shop again this week to continue trying to convince them to sell me some old equipment they haven't used in over a decade including a black granite Mitutoyo plate and a cast iron plate. I'll wear them down over time (there's a lapping joke in there somewhere...). Cheers!

[@timmallard5360]

Excited video Robin! Thanks for sheeding more light on those questions. I love that your anwers are full of well explained content and never once the mention of "just because" or I've been doing this for X years. It's the sign a true master. I think the hardest part of designing or analizing anything is the application of constraints. In the first video it was so easy to get hung up on the intro to diff levels. But the stiffness of the plate like you said got bumped into the whole system. I litterly hit my self in the for head saying of course the loads on the plate are negligable. Ahhahh moment achieved!

[@sebastiancardoso7264]

You are the Socrates of mechanics :) keep the good content up!!!

[@williamthrasher8540]

being questioned and asking questions is one of the best ways to learn.

[@wnebergall]

Rob even though you're way over my head for my home shop raggety machines I still learn a lot from you and I appreciate it thank you

[@workaholic5318]

You are far more patient than I am with questions and my hat is off to you for your tenor and responses.

[@whidbeyman]

Thanks for addressing my questions. I appreciated each of the 34 minutes.

[@FredMiller]

Loved it! 30 minutes flew by! Thanks for sharing all the answers to the questions you received. Keep up the good work!

[@OakesProject]

You may not think you are an expert. I'll have you know that after watching hours of videos on machining and listening to you. You are more of an expert than you think you are sir. Do not sell yourself short. Much respect.

[@ROBRENZ]

Thanks for the kind words, It's not a good idea to think too highly of ones self :-)

[@fterrysmith6753]

Thanks for your efforts - I'm sure I'm not the only one enjoys them.

[@ajtrvll]

F Terry Smith - No... you most definitely are not the only one. 😁

[@jesusjcrrotary9271]

Thank you for thanking the time to answer the temperature question. It gives me much to think about for setting up my future workspace.

[@Rob_65]

I must have seen these videos at least 3 times and I am still learning new things each time. Each time I am leaning forward on the tip of my chair so I don't miss even one word 😁

[@ROBRENZ]

Glad to help

[@BossWelder81]

Humility like that is why you garner such appreciative loyalty among us viewers. You might not view yourself as an expert but with over half a century of experience most of us would be pushing it to consider ourselves enthusiastic amateurs by comparison. Thanks for the video, Mr Renzetti. I always look forward to virtual apprenticing on your channel. That guy's idea about unlimited funds would be great!! :)

[@MatthewRulla]

Nice answers. Keep up the great work!

[@PSUQDPICHQIEIWC]

The vid is a gold mine of insight, as usual.

[@hunkeyehunkeye4601]

thank you for the video and for being thorough. we are all looking forward to more.

[@RRINTHESHOP]

Excellent session. Thank you Robin.

[@wileecoyoti]

Just wanted to check in and say "thank you" for taking the time to do this. Even if you're not an expert, between your experience and the comments down here I think we're all getting educated... and having the opportunity to start thinking about the many variables that are involved in precision work.

[@bjornlundberg8809]

I feel calm, enlightened and happy now. Thank you Robin!

[@beachboardfan9544]

Great little series you have going here, looking forward to part 2!

[@turningpoint6643]

As always another interesting and very informative video Robin. And I think you being far too modest. Maybe it's an age thing, but I quickly learned to be a bit patient while watching some of the best in the YT machinist community. Anyone like Yourself, Tom, Adam, Brian, Keith and many others do know what there doing and that anything that might not be immediately apparent in one video usually becomes clear and logical over a few more videos. Trying to second guess someone highly knowledgeable without having all the information they do never works out well. :-) I've been in mining for a lot of years and yes it's obvious that silica isn't good for you. But if anyone who's concerned about it would do a little research it takes decades of breathing high concentrations of the dust to develop silicosis. Yes you should be proactive in protecting your lungs, but the little that would get stirred up while flattening this plate can be pretty much ignored.

[@ajtrvll]

Who's this Brian? To the list, I would add Stefan, Chris and Dan.

[@turningpoint6643]

Brian Bloc or bcbloc02 for the channel name. And the ones you mentioned would have been covered by my "many others". Anyone subscribed to Robins channel would I'm sure know of all the ones we both mentioned.

[@ajtrvll]

Turning Point - Thanks! I did not know of Brian Bloc (bcbloc02)... will check him out.

[@turningpoint6643]

A very smart and clever guy ajtrvll. Most of his videos in the last 2 + years are of him single handedly rebuilding an old falling down tobacco barn into a new shop. He does some custom engine components for tractor pulling among other things. He's just starting to move some equipment into the new shop so people like us should find something of interest on his channel. Jan Sverre Haugjord would be another good channel for very high accuracy machine tool rebuilding if that interests you.

[@houseofbrokendobbsthings5537]

Thanks Robin. Excellent recap. Theory and practice makes for understanding - as you have kindly shown us. Some folks would gripe if they were given everything for free. _Dan_

[@jasonh3109]

Another gem! Thanks for your humble sharing of smarts. 😄

[@brianevans1946]

Great video, very informative, thanks Rob..

[@ntesla66]

Awesome! Really enjoy you videos. Your physical and mental attention to detail is a pleasure to watch in action.

[@billdlv]

Great info Robin, you attention to detail is very inspiring.

[@gasparini76]

You are brilliant Rob. A real gem on KZbin. I really like your videos. They do have very good content. thanks a lot!

[@HellSpawn722001]

Learned a lot from this video!!!! Thanks Robin for sharing it.

[@sharkrivermachine]

Thank you for addressing others concerns. You certainly have a way of presenting material that could not offend anyone. Another informative interesting video, don't sell yourself short you know what you are talking about.

[@reallycoooool]

Thank you for yet another informative video!

[@twistedupright8697]

Perfect, answered all my questions about part 1 and some I hadn't thought of. Keep'em coming, and if I hit the lottery You will be the second on my list. Thanks

[@johnmcdonnell6109]

Great video! I really like watching the work and then hearing people’s question get answered. I helps me better understand the topic better. Keep the videos coming! Thanks for your time and effort in doing them.

[@GuyBarry1]

Robin, if you're not an expert, there is no such thing as an expert.

[@MaX271]

I leanrt something today! Very clear explanations

[@pearcemachineshop5200]

Brilliant explanation Rob 👍 looking forward to more work on the plate. Alan.

[@ckvasnic1]

Another awesome show... Thank you for sharing your time and many talents!

[@johnbodmer5645]

Lot of good and useful info in this video Robin, thanks.

[@AluVixapede]

I'm seriously learning a lot from these, thanks for sharing!

[@ROBRENZ]

Glad to hear it!

[@christurley391]

Thanks for the explanation Robin.

[@kevCarrico]

fantastic explanations - thank you!

[@CJ_LEGAN]

As I grow older, I have learned I know less than I use too. Ignorant dogs can learn new tricks if they’re not ignorant. Thanks for the videos!

[@mrblack61]

Ignorance is fine, its when were unaware of own ignorance it becomes a problem. Im as ignorant as they come ;)

[@craignicholson505]

Amazing I learned so much and corected a few mistakes I thought I knew thanks rob

[@ChrisUhlik]

Learned a lot. Thanks for doing these Q/A style videos.

[@Neo7CNC]

I enjoyed the video Robin!

[@r.j.sworkshop7883]

Thank you. I really enjoy the feedback of a Comments Q&A video. I know that it takes you far more time to do it this way, but it brings out some of the nuanced points into clearer detail. And BTW you use the shower curtains to limit distraction, and then you input a can of olives into the scene. All I could focus on was the label on top. Great work, thank you for your time and efforts. R.J.

[@RGSABloke]

Robin, the work you do, the way you explain your techniques and challenge your own beliefs/knowledge is surely a sign of a committed practitioner. At this point i would like to give a massive shout out to Stephen Hawking, who, like you, challenged norms and previously accepted wisdom. We can only be grateful we were able to share some of his lifetime. Please keep up these challenging videos they are a real source of wonder and amazement to many of your viewers. Most sincerely. Kindest regards. Joe.

[@ROBRENZ]

Thanks for the very kind words Joe, Hope to contribute till I drop also. ATB, Robin

[@edwardburgess8440]

I have learned a lot more today, I like your common sense approach we should all know it cannot be perfect something we attempt to achieve. Good video I am waiting for some more. regards, Ted.

[@MrJugsstein]

I have had some instructors thatcould make the secrets of tje universe boring. You are definitely of the small group who could / can make reading the back of a match packet or in this case making a stone flat interesting. Thanks Will

[@brianbutterfield9891]

Great video Robin.

[@pierresgarage2687]

Hi Robin, You're one of the very few that will keep me sitting for over 30 minutes listening at a complete video... (Actually 17 minutes 1 second, twice the speed... ) Guess that every time we disturb something on our side of the planet, the Chinese "feel it" and vice versa... Interesting.... ;) Great source of reflections on the subject in one video, glad you shared. Cheers, Pierre

[@ROBRENZ]

Thanks Pierre, that just shows you have poor judgement on what you watch :-) Thanks for watching and commenting. ATB, Robin

[@pierresgarage2687]

LOL...!!!

[@larryschweitzer1007]

Always great to watch a fanatical point of view, adjusted for a bit of reality. The sign of a true expert. Thanks.

[@deeremeyer1749]

A true expert in "leveling" a surface plate who repeatedly asserts that anything that touches a surface plate "distorts" and "bends" it therefore making a surface plate pretty much impossible to "level" since you can't "level" it with "nothing". How does the "level" plate stay "level" or "flat" with parts and tools on it for "measurement"?

[@ER-zv1nr]

Excellent video !

[@stevewilliams2498]

Glutton here. Keep going Rob. I shall never use the knowledge per sé but enjoying understanding the nuances of precision measurement.

[@ajtrvll]

Some folks are allergic to glutten. Some pretend to be allergic to it. Personally, I'm glutton for glutten. 😉

[@ajtrvll]

Steve Williams - Wait a minute... what about my joke?... leaving me to hang, are you?

[@lapoint7603]

Great video! Your explanations really made sense and make the it much easier to understand what you're attempting to do and why you are doing it. I looked at your channel after hearing of you on Tom Lipton's channel. You guys put out great content! Keep it up! Thank you very much!

[@zephyrold2478]

Hi Robin, You being able to explain afterwards what you explained in the first instance makes me confident in that you know what you talks about, a good old carbide sharp edged thumbs up to you.

[@zephyrold2478]

Thanks Robin, especially the part about not using the same hardness for lap and the piece to be lapped was interesting to know.

[@cdbflynow]

Very good Robin. Thanks

[@keithj30]

Very informative i could watch your videos for hours,don't know what that says about me,but you have a way of getting your point across in a very easy to understand way.Keep up the good work and hopefully some rich person will finance you, we all wish for a rich benifactor ..

[@billzweig]

I've watched both videos and you have already touched on some of the points I was going to bring after watching the first. The precision level measurment is working well and I've used my levels and clinometr (Hilger Watts Microptic) for similar tests and measurments. Another test tool to consider is the autcollimator. For me it offered some advantages in the fact that I find the level bubble painfully slow to settle (the more accurate the more so) and the mirror is light making countrballncing unnecessary. Possibbly also that I really enjoy using my Leitz autocolimmator.... Thank you sharing your experiance.

[@OO-xc7zg]

Outstanding info! Thanks👍👍

[@davidberndt6275]

Thanks Robin!

[@oakenarbor2046]

Excellent. Very informative. Thanks for sharing with us.

[@larrychamberlain2871]

I learned something tonight, thank you.

[@libertworks]

Keep making videos like this one. Great content.

[@mrblack61]

Nice points Robin, the carbide feet view is new on me, makes good sense. Had to laugh when you mentioned some guys getting their panties in bunch about the last video, popcorn ready and off to enjoy the show lol.

[@kwasg3]

Thanks Rob, I love how in depth the conversation is. Reminds me I may still have critical thinking skills. I have a question with no condescending intent at all: If getting your checking instruments correct includes compensating for things like leaning on the table, where is that kind of accuracy in a part - important?? Is it accuracy for accuracy's sake?? I had a family friend that had a career machining for a nuclear trigger plant. He said once that they would take the engineering plans and cut the tolerances by a factor of 100, and in one phase of the project they were scrapping parts based on the time of day they were made. It eventually was discovered this effect was because a coal train would pass by a mile away. I always thought, is that level of tolerance really important? Thanks for the vids, another great series!

[@darrenblattner2508]

Robin. You may not be an expert but from what I've seen of your work, you have no need to apologize or explain your methods. In the end I am quite sure you plate will be perfect. You're that kind of person. Excellent videos. Thanks and keep smiling.

[@jcknives4162]

Dang it. These videos came up on my suggestions part of KZbin and no part 2 yet... lol. thank you for your efforts. I look forward to seeing more work and the finale.

[@Thunderbelch]

Great video as always! Looking forward to the rest of the journey as I have a slab of granite that's been sitting in the garage waiting to be lapped for some time now (plain slab from a headstone supplier). I can see how the Renz-o-meter is self calibrating; very clever. Can't wait to see the details of the sensor/electronics...

[@bekanav]

I've done a bit similar thing. First you must notice headstone slabs may not be very flat, there might be 1mm/1m error or more. It means hard grinding work, perhaps using angle grinder with diamond wheel. Then you need big tools to start the work itself and a good straight edge to study surface flatness. Renz-o-meters etc. are not needed until surface is quite flat. I finished my plate (at least so far) just below 10u because it is good enough for me. Good luck!

[@nothermarkgnomex]

Great video. I understand the concept of everything moves but I don't know the techniques to minimize the distortion. Your talk helps fill in the practical side. Thank You!

[@mainengines]

Just enjoy your presentations.

[@bcbloc02]

So once you perfect your technique when did you say we were doing my 4ftx6ft plate? :-)

[@ar-mory]

I suppose that pros don't use grooved laps as a matter of safety margin. Once the layer of dust floats the lap enough to affect cutting it's probably a good point at which to stop and check their work. Being able to feel and hear the change in cutting action likely helps prevent too much material removal.

[@drzorbo3770]

Excellent video. Subscribed. Thanks for the uploads.

[@CapeCodCNC]

Great, informative video. Thanks!