Gallery, Projects and General > How do I??

Math for machinist tapers...

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seadog:
Hi Pekka, Abom79 shows an accurate way to set up for a taper. He has a taper attachment but still uses a method to check accuracy which is valid for setting a compound too.

3Gcng

Graham

seadog:
It starts at aound 18 minutes in.

AdeV:

--- Quote from: PekkaNF on September 12, 2017, 05:33:43 AM ---
Great. I assume that 4.500" TPF stands here for included angle, which ratio is 4,5" for 12,0" and half angle would be 2,25" displacement at 12" distance? Is this correct and if not what actually then this 4.500" TPF stand for and what it is when setting the machine to do this taper?


--- End quote ---

Sounds right to me. If it makes it any easier, 4.5" TPF is the same as 45mm per 120mm...

PekkaNF:

--- Quote from: AdeV on September 12, 2017, 06:06:51 AM ---
--- Quote from: PekkaNF on September 12, 2017, 05:33:43 AM ---
Great. I assume that 4.500" TPF stands here for included angle, which ratio is 4,5" for 12,0" and half angle would be 2,25" displacement at 12" distance? Is this correct and if not what actually then this 4.500" TPF stand for and what it is when setting the machine to do this taper?


--- End quote ---

Sounds right to me. If it makes it any easier, 4.5" TPF is the same as 45mm per 120mm...

--- End quote ---

Great, I didn't want to change the language to make matters even more confusing :lol:

Basically my question is that is this TPF just a straight ratio on orthogonal coordinates, no funky stuff here? The funky part is that it is included angle i.e divide by two to get something usefull?


Graham, Abom79 vids are allways worth checking. Thank you. Another person that makes a lot of stuff very clear is that al-bundy looking guy that sounds like my physics professor...what was his name Piezak or something. Spot on, without too many practical omissions.

Pekka

seadog:
Joe Pie, as he jalls himself bejause noone can pronounce Pieczynski   :Doh:

I thought a video might be worth a thousand words.

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