Shopsmith Forums

reible wrote:

Dansmith wrote:Thanks for the links, Ron. They will be helpful.

By the way, on my measurements of the runout, not so sure as to the accuracy due to the flat spot on the spindle.I re-measured last night and only got about .00075 runout on my newest one. Haven't remeasured the other one yet.

I'm thinking, and please let me know if you think otherwise, that I should use the one with the least runout as the dedicated drill press and the other as the lathe. Or, due to the negligible difference, does it even really matter?

When I see all those zeros and decimal places I have to wonder what you are using to do the measurements? I'd like to see pictures of your setup. Are you a machinist by chance?

Ed

Ed, just using a Harbor Freight dial indicator with a magnetic base set on the carriage. By the way, the 10 thousandths measurments are an estimate since my indicator only does increments of thousanths. Reading between the lines on the indicator.

Although I am not a machinist, I wish I had been. I did start work as an apprentice moldmaker (machinist) for about 2 years around 40 years ago. If you still want to see pictures of the dial indicator set-up, let me know and I will go take some.

Dansmith wrote:

reible wrote:

Dansmith wrote:Thanks for the links, Ron. They will be helpful.

By the way, on my measurements of the runout, not so sure as to the accuracy due to the flat spot on the spindle.I re-measured last night and only got about .00075 runout on my newest one. Haven't remeasured the other one yet.

I'm thinking, and please let me know if you think otherwise, that I should use the one with the least runout as the dedicated drill press and the other as the lathe. Or, due to the negligible difference, does it even really matter?

When I see all those zeros and decimal places I have to wonder what you are using to do the measurements? I'd like to see pictures of your setup. Are you a machinist by chance?

Ed

Ed, just using a Harbor Freight dial indicator with a magnetic base set on the carriage. By the way, the 10 thousandths measurments are an estimate since my indicator only does increments of thousanths. Reading between the lines on the indicator.

Although I am not a machinist, I wish I had been. I did start work as an apprentice moldmaker (machinist) for about 2 years around 40 years ago. If you still want to see pictures of the dial indicator set-up, let me know and I will go take some.

Interpolation. A very common thing in the analog world. Think slide rule. That is for those that know what a slide rule is.

jsburger wrote:

Dansmith wrote:

reible wrote:
When I see all those zeros and decimal places I have to wonder what you are using to do the measurements? I'd like to see pictures of your setup. Are you a machinist by chance?

Ed

Ed, just using a Harbor Freight dial indicator with a magnetic base set on the carriage. By the way, the 10 thousandths measurments are an estimate since my indicator only does increments of thousanths. Reading between the lines on the indicator.

Although I am not a machinist, I wish I had been. I did start work as an apprentice moldmaker (machinist) for about 2 years around 40 years ago. If you still want to see pictures of the dial indicator set-up, let me know and I will go take some.

Interpolation. A very common thing in the analog world. Think slide rule. That is for those that know what a slide rule is.

I like that word, "Interpolation". Still have a slide rule. Not so sure I remember, if I ever really knew, how to use it correctly.

Dansmith wrote:

jsburger wrote:

Dansmith wrote:
Ed, just using a Harbor Freight dial indicator with a magnetic base set on the carriage. By the way, the 10 thousandths measurments are an estimate since my indicator only does increments of thousanths. Reading between the lines on the indicator.

Although I am not a machinist, I wish I had been. I did start work as an apprentice moldmaker (machinist) for about 2 years around 40 years ago. If you still want to see pictures of the dial indicator set-up, let me know and I will go take some.

Interpolation. A very common thing in the analog world. Think slide rule. That is for those that know what a slide rule is.

I like that word, "Interpolation". Still have a slide rule. Not so sure I remember, if I ever really knew, how to use it correctly.

I still have mine. Back when I was still working I took it to work. I worked closely with the engineering office and they had a couple of student engineers. They had heard of a slide rule but had never seen a real one, only pictures.

I used a slide rule in College .... Everyone knew what they were then LOL slide rules got us to the moon the prior year

rjent wrote:I used a slide rule in College .... Everyone knew what they were then LOL slide rules got us to the moon the prior year

And the slide rule built the SR-71 Blackbird which is still the fastest air breathing maned aircraft ever built.

Wow , slide rule! Brings back memories. I still have my Versalog , can't find the book though. Every time I see Apollo 13 and the "Houston we have a problem " scene flashes to mission control, they ain't using battery powered calculators, it was slide rules. Led calculators were just coming out , and A few of us was actually faster (up to about 3decimal points )than the calculators .I've almost forgotten where to start now. I showed an engineering/architect student the rule in the case , asked him did he know what it was and he said "a knife?!" Lol
Sorry fellas I just had to share that with you, it was so pleasantly a nastalgic calculated moment that had nothing to do with woodwork.
Jus sharing
Thx.
Doc

I wonder how one tells the engineering students from the 'normal' students nowadays.

JPG wrote:I wonder how one tells the engineering students from the 'normal' students nowadays.

'Normal' students may be able to spell 'engineer'
Dick

For you young bucks here is a picture of a slide rule. It is my K&E bought in about 1966. These were used to design everything precision. There were no computers or even hand held calculators back then. Everything was analog.