Thread: U tube idea

if you are getting at what i think you are then no , all it means is that you have to take a skim off the point of the drive end center each time it is replaced in the chuck to get a true center again , because it will be a tad out every time it is refitted in the 3 jaw .

clear as mud i know .

johno

Where is he aligning the tailstock?

Stuart

P.s. Spindle center (I'll let you decide if its live or dead) runout doesn't effect parallel..... only next time.

wow, a good way to bugger an expensive Bison adjust tru six jaw chuck there, clamping down that hard....

oops ! My mistake, yes the 6 jaw chuck would have less of a problem with repeatabilty, that was the crux of my query Mike

So what was the original query Mike?

Originally Posted by Techo1

So what was the original query Mike?

Each time he clamps that centreing tool in the 6 jaw chuck chuck, there will be some error in the alignment of the tool . So he will be getting misleading readings . I mean, he sets up the tool, then takes a concentric reading , then removes the tool - but will the chuck clamp the bar in the exact same position all of the time ?

Maybe I'm barking up the wrong tree again

Originally Posted by morrisman

Each time he clamps that centreing tool in the 6 jaw chuck chuck, there will be some error in the alignment of the tool . So he will be getting misleading readings . I mean, he sets up the tool, then takes a concentric reading , then removes the tool - but will the chuck clamp the bar in the exact same position all of the time ?

Maybe I'm barking up the wrong tree again

I'm surprised they used a chuck at all.

Surely they would use a dead centre and a drive plate (fixed or screw on) ?

After all, that's a primary reason of having a taper in the spindle.

The whole setup seemed weird to me.

Rob

Mike i think thats the wrong video......It about turning between centers like we have been discussing in the other thread, not about aligning a tailstock.....

Ew

Originally Posted by Ueee

Mike i think thats the wrong video......It about turning between centers like we have been discussing in the other thread, not about aligning a tailstock.....

Ew

Hi Ewan, Yes sorry about that . I will find the correct video tomorrow at the library and post the link here . Mike