Doesn't that give you a measurement that depends on where you positionned the 3 reference points? At least it gives an upper bound on flatness

@Machining-tutorials

2 ай бұрын

By setting three jacks to zero, you create a reference plane. As you scan the entire face from this plane, identifying all highs and lows, you accurately measure the surface's flatness. This method ensures consistency; regardless of how you might reposition the jacks and establish a new plane, the maximum deviation found-the total flatness-remains the same. Essentially, no matter where the jacks are placed, as long as they're zeroed to form a plane, your measurement of the surface's maximum deviation (its flatness) will always be consistent and reliable.

@jercki72

2 ай бұрын

@@Machining-tutorials There definitely seems to be something missing. For example setting the three jacks very close together could give a much greater deviation on a point much farther away... although no sane person would think of doing that. Probably though if the jacks are at the edges the difference would be minimal anyway

@Machining-tutorials

2 ай бұрын

Exactly! Measuring within the area defined by the three jacks, especially when they're placed towards the edges of the part, ensures greater accuracy. This practice minimizes potential deviations that could occur if measuring outside this area. Positioning the jacks near the edges is indeed good practice, as it provides a stable and representative base for assessing the entire surface's flatness. Thanks for the question. I might pin this to the top to hopefully further explain this process. Ill cover this with an actual example and link to this video to help others. Basically stay within the jack parameter for more accuracy. @@jercki72

recommended gang

Huh, so simple. The central concept is to support at 3 points and zero those points. Bingo, you’ve got a plane. Saw it and felt a little dumb for not having realized it in the first place. (I have a good understanding of geometry, had just never connected the dots like this.) Thanks! (Very nice animation, btw👍)

@Machining-tutorials

2 ай бұрын

No problem, thanks for watching!

*Promosm* 😑

I hate that rickety tick music. If you speak english well, do a voice over.

@Machining-tutorials

2 ай бұрын

I have other videos with me talking, we do both visual 3D animations and others with me teaching "in person". Hopefully you can find some with music you like. Thanks for watching!

@12345NoNamesLeft

2 ай бұрын

@@Machining-tutorials The best music is no music.

@Machining-tutorials

2 ай бұрын

@@12345NoNamesLeftthat explains why I drive home in silence time to time 😂