So much fantastic reference material on your channel. As a total novice (as with most things) it's different when you have to solve these problems yourself, by yourself. These videos are not only helpful demonstrations, but they put me in the right frame of mind to think things through. Really appreciate your efforts.

Thank you Marc, I am from the future 16/04/2021 to be exact. You sent me back in answer to my question about a more complicated bolt hole pattern. You get 10 out of 10 in my book for your content and another 10 for answering my question to you. I am retired and like you a time served machinist, in my case as an engine fitter and turner. Your video took me way back and I remembered we used to get the coordinates from a Zeus table. Once again thank you very much and I look forward to further videos. Bernie

An excellent demonstration of accounting for backlash. Bonus points for showing the easy way to calculate bolt circles.

@SoWe1

7 жыл бұрын

Hmm, I feel like it's not "an easy way to calculate" them, it's letting them be calculated for you.

@duobob

7 жыл бұрын

Indeed, it is letting them by calculated for you, by computer and a fixed application that is tested and works and is easy to use, and gives reliable results. I certainly know how to do the trigonometry to do it the old fashioned way, and I would do that if I needed to. That manual method can very easily lead to mistakes if one is not careful. If someone prefers to do it that way, go for it! Maybe make your own trig tables as well... 8^)

I can tell you as soon as you said "drill five holes in a particular pattern, accurately" (considering my limited machining knowledge).. my head started to hurt.. Then like magic you made the difficult understandable and ultimately easy. Thank you. No more wonky parts. So. Ca. USA

I "liked" the video after 30 seconds, just because I love the promise and you always deliver on your promises. Well, at least in the context of your videos. I can't speak to your personal life. Also I have the same mill. Just got it set up on Saturday. It's going to be nice to be able to actually do all the things you show. :)

Great lesson on bolt hole circles.

nice tutorial, easy-to-understand for us want to be machinists

Very useful to me. I have no DRO's. Thank you.

What an excellent video. You are a natural teacher. Im a newbie and this makes things so easy!

@THATLAZYMACHINIST

6 жыл бұрын

Thanks Alfa! It's all for fun and the videos are keeping me busy in retirement. You can link to all my KZread videos (well over one hundred) easily from my free website Thatlazymachinist.com .Thanks for watching! Marc

Great demo. Thanks Marc.

Another great video always learn something.Like your way of dealing with backlash.

Thanks Marc, I enjoy these instructional vids , even though I am familiar and think I know, I always come away with a bit more knowledge than when I started. It is always nice to be able to clean up one's methods so to speak. Cheers ,mon ami!

great machining, WATCH YOUR HEALTH!!! Cheers Teun

awesome job explaining this. Thank you

Many Thank Yous Marc, Your timing on this video is epic! I just got a project with a 6 bolt hole pattern. I have the same Mill (no D R O ) at home that I will be using for this project. While the mill at work has all the bells and whistles and no backlash. Now with your help I am much more confident in producing this part correct the first time! I am grateful for your lessons, Thanks again!

Thanks Marc. clear as a bell as always.

Excellent. Thank you.

Loved it. We had to lay out the holes by coordinates back in the 1980's when I was in junior college.

Great explanation, Thanks

Could you do a video on the technique that you would use to accurately mill a square pocket without a DRO? Thanks, Chris

Thanks for sharing your knowledge and experience with us, Marc. It is appreciated.

Thanks for sharing Sir!

"Ordre" must be Quebecois for...Eh bien, vous avez l'idée. Great presentation as usual. Many thanks, Marc.

@THATLAZYMACHINIST

7 жыл бұрын

You are right! I did the french version first and forgot to change the "ordre" of the letters. there are many words in French and in English that are the same or almost the same. Even though the English and French do not like to admit it, the two countries and their languages have many similarities. Thanks for watching and be safe! Marc

well done, thanks!

very good.thanks

excellent....

Great video - perhaps it should have been subtitled "Backlash Management" - I love your practical double check use of a digital caliper & scribe marks.

Nice timing. I just ruined a part with an inaccurate bolt hole circle. It's a round part but I should still be able to use your approach.

Great video!!! Would it be good to scribe all of the coordinates when you are doing the layout on the surface plate? If nothing else I imagine it would make a great sanity check when you are ready to drill the hole. Thanks, Chris

@THATLAZYMACHINIST

7 жыл бұрын

Yes that can be done and it would be a good way to avoid errors. I opted for the easier digital caliper technique because, after all, I am "that lazy machinist". Thanks for watching and thanks for a great comment! Marc

How about cutting a complete ball?

I come in defence of poor old trigonometry, because I think it gets a bad rep and calculating the coordinates can be almost as quick as looking them up. So for the youngsters who aren't afraid of a little maths, here's how I would do it: R := 1, so x1 = 1 and y1 = 0 are trivial. The full circle has 360° so 5 equally spaced holes would be 360°/5 = 72° apart. x2 like x5 are the adjacent sides to the 72° angle, the hypotenuse equals R, so x2 = x5 = R*cos(72°) = 0.3090. y2 and y5 being the opposite sides, so y2 = R*sin(72°) = 0.9511 = -y5. And for hole 3 and 4 it's the same, but with an angle of 180° - 2*72° = 36°, x3 = x4 = -R*cos(36°) = -0.8090 and y3 = R*sin(36°) = 0.5878 = -y4.

Mile, lol