Wayne: Thanks for posting this. I've recently become interested in autocollimators and purchased one on Ebay. More for the interest in the science and playing in my home shop than a real need. Found your video outstanding. Nice explanation.
+Ron Schmaltz Thanks! I also plan on showing the use of an optical square with the autocollimator as well as surface plate calibration. The last one will take a while :) Lots of numbers to crunch!!
@@WayneHilliard was looking at this for building a few CNC machines, now I need this.... Seriously though thanks for the videos, the PDFs were a bit of a head scratcher for me.
Yes actually the radio was in another room but the mic was able to pick it up. Sorry about that! I Learned not to have noise sources on at all. Thanks for you comment!
Thank you for this, I'm in the process of rescaling a selection of 6ft came backs without access to a master to scrape to. I was wondering if an autocollimeter would help. Now I know it will once I get my head around the maths. Great video , hope you got your shaper rebuilt to a satisfactory level. I did mine last year, so this year's project is a tool room lathe. Target is 0.0001/10" alignment. Should be a challenge. All the best Mat
6:11 What is your surface plate made of, granite? Would it make sense to use a green laser beam as a light source? 12:39 - I'm interested on how you are able to know if that cast iron bar really have a straight edge...
Wayne: after thinking about it, and you may have probably already done this,is to check your rock down that line, then rotate the straight edge 90 degrease and run the mirror on top of the straight edge. Then place the straight edge on the "Airy points" and run the mirror on top again. then think about the results. good luck i will be watching. Thanks, ron
+Ron Schmaltz I have not. I will need to make a rail assembly close to the same height as the straight edge. The width of the sled feet that way is too wide for the straight edge alone. It doesn't need to be particularly straight as any variation in height on that foot will only result in a rotation of the mirror about that axis and no angular displacement will result. Will be an interesting video I believe.
+Wayne Hilliard YES! Wayne; you are defiantly taking it to the next level: the beauty of an autocollimator is that with it you can check almost everything (and i don't know if i should use the word "almost:") lets just say that it is a beautiful thing. my problem is that i only have one. none the less you may see that your straight edge flexes under its own weight. i won't be surprised. All more and more curiouser. i appreciate what you are doing and that you are posting videos. Oh that is a very very nice mirror you have there. thanks. ron
Great video, thanks for the explanation. What make model is your autocollimator? What do I need to look for when searching for a autocollimator of my own?
Hey Wayne. Great Video. I just purchased a Brunson Keuffel and Esser optical autocollimator and associated mirrors, essentially for exactly the same reasons that you have sited. I am a basement shop guy, and quite simply, I find this topic SO interesting. My questions range from reading the autocollimator to reading the Mahr Supramess .000002 indicator on the flatness indicator. Questions that I am certain you have had to research thoroughly. Do you have an email or would you be willing to give me your contact information so I could contact you directly with questions (I have a number of them). Thank you again for the video(s). Derek.
Hi One Two, Thanks for the comment. Didn't find it ti just now. I have to respectfully disagree though. Taking the sine is the proper operation and This is why. The 2 inch spacing of the feet on the mirror is forming the hypotenuse of the right angle. The foot that deflects up is forming the opposite side of the right angle. The movement down the plate forms that adjacent side. Sine = opposite/hypotenuse . Now you can get close enough results taking the tangent because of the small angle rule wherein the tangent of a small angle is approximately equal to the amount of angle in radians. To illustrate this take the sine of a small angle say a 1/8 of a degree then the tangent of the same angle. The results will agree out to several decimal places. I can clarify in another video if you'd like. Thanks again! :)
Wayne: Thanks for posting this. I've recently become interested in autocollimators and purchased one on Ebay. More for the interest in the science and playing in my home shop than a real need. Found your video outstanding. Nice explanation.
Thanks Dave!! Happy you found it useful.
Awsome! Loved it. I always wondered how a surface plate was checked to the millionth place. Now i know. keep it coming!
Best
Matt
Thanks for the great video Wayne. I always wondered how they worked. I had a fair idea but good to see it being used.
Wayne: thanks for sharing i ran across your video because i too am rebuilding a machine and was thinking of dusting off my autocollimator.
+Ron Schmaltz Thanks! I also plan on showing the use of an optical square with the autocollimator as well as surface plate calibration. The last one will take a while :) Lots of numbers to crunch!!
@@WayneHilliard was looking at this for building a few CNC machines, now I need this.... Seriously though thanks for the videos, the PDFs were a bit of a head scratcher for me.
Please consider this as constructive criticism.. I enjoyed the video very much the music at the end was very distracting.
Yes actually the radio was in another room but the mic was able to pick it up. Sorry about that! I Learned not to have noise sources on at all. Thanks for you comment!
Thank you for this, I'm in the process of rescaling a selection of 6ft came backs without access to a master to scrape to. I was wondering if an autocollimeter would help. Now I know it will once I get my head around the maths. Great video , hope you got your shaper rebuilt to a satisfactory level. I did mine last year, so this year's project is a tool room lathe. Target is 0.0001/10" alignment. Should be a challenge. All the best Mat
6:11 What is your surface plate made of, granite? Would it make sense to use a green laser beam as a light source? 12:39 - I'm interested on how you are able to know if that cast iron bar really have a straight edge...
neat, thanks. now on to your second video
Wayne:
after thinking about it, and you may have probably already done this,is to check your rock down that line, then rotate the straight edge 90 degrease and run the mirror on top of the straight edge. Then place the straight edge on the "Airy points" and run the mirror on top again. then think about the results. good luck i will be watching. Thanks, ron
+Ron Schmaltz I have not. I will need to make a rail assembly close to the same height as the straight edge. The width of the sled feet that way is too wide for the straight edge alone. It doesn't need to be particularly straight as any variation in height on that foot will only result in a rotation of the mirror about that axis and no angular displacement will result. Will be an interesting video I believe.
+Wayne Hilliard YES! Wayne; you are defiantly taking it to the next level: the beauty of an autocollimator is that with it you can check almost everything (and i don't know if i should use the word "almost:") lets just say that it is a beautiful thing. my problem is that i only have one. none the less you may see that your straight edge flexes under its own weight. i won't be surprised. All more and more curiouser. i appreciate what you are doing and that you are posting videos. Oh that is a very very nice mirror you have there. thanks. ron
Great video, thanks for the explanation. What make model is your autocollimator? What do I need to look for when searching for a autocollimator of my own?
Fantastic video. Do you have a link for the PDF you used to describe the collimator ?
Hey Wayne. Great Video. I just purchased a Brunson Keuffel and Esser optical autocollimator and associated mirrors, essentially for exactly the same reasons that you have sited. I am a basement shop guy, and quite simply, I find this topic SO interesting. My questions range from reading the autocollimator to reading the Mahr Supramess .000002 indicator on the flatness indicator. Questions that I am certain you have had to research thoroughly. Do you have an email or would you be willing to give me your contact information so I could contact you directly with questions (I have a number of them). Thank you again for the video(s). Derek.
Thanks!
Seriously turn the radio off other than that it's a good video
@ 24:00 you should be taking tangent of the angle, not sin of the angle.
Hi One Two, Thanks for the comment. Didn't find it ti just now. I have to respectfully disagree though. Taking the sine is the proper operation and This is why. The 2 inch spacing of the feet on the mirror is forming the hypotenuse of the right angle. The foot that deflects up is forming the opposite side of the right angle. The movement down the plate forms that adjacent side. Sine = opposite/hypotenuse .
Now you can get close enough results taking the tangent because of the small angle rule wherein the tangent of a small angle is approximately equal to the amount of angle in radians. To illustrate this take the sine of a small angle say a 1/8 of a degree then the tangent of the same angle. The results will agree out to several decimal places.
I can clarify in another video if you'd like. Thanks again! :)
Please use a script. Start with the subject matter. Add the byline story fill AFTER.