A little challenge

[DaveTTC]

Had the pleasure of a visit from Mr and Mrs Simplicity today at the 'farm' as the kids call it. By the way if anyone jad a spare giraffe Tommy wamts one.

Anyway we decided to have a play on the lathe. Matt had a go at a chisel ....
https://uploads.tapatalk-cdn.com/20180519/58cef84aebe824547795aa68c63945a3.jpg

And then it was skew time

https://uploads.tapatalk-cdn.com/20180519/6b7d9de0ff67153d01c7d2bd8fe70fe5.jpg

The challenge .... a parallel cylinder without the use of amy calipers, measuring devices or straight edgehttps://uploads.tapatalk-cdn.com/20180519/60b2b2d529ef7487b9e0a6dd32d88dc1.jpg

And thus we took turns (excuse the pun) to aee if we could out do each other.

https://uploads.tapatalk-cdn.com/20180519/0818ccf71e369e4161725d104edbd125.jpg

Once completed we then used the calipers and a straifhtedge to see how we faired.

https://uploads.tapatalk-cdn.com/20180519/2771616f8fff76a575d648fac66833ec.jpg

Not too bad. Worst of all out attempts was plus or minus 1mm over about 250mm. Generally not much mpre than about 0.075mm total deviation. We did find the smaller the piece the more we were out of parallel.

Have a go. Tell us how you faired.

DaveTTC
The Turning Cowboy
Turning Wood Into Art

[Simplicity]

Its actually is quite a challenge, and as David said getting below a deviation of 0.075 is quite the challenge.
Also as the diameter dropped below about 40 mm it gets even harder.

We're both now sitting back enjoying a dirty granny.
It's a boutique cider what did you think I meant.

Cheers Matt,

[Kuffy]

We're both now sitting back enjoying a dirty granny.



This is one of those times I wish I read at a much greater speed

[macandrita]

Hi gents,
So the "straight" tool rest was no help at all? :D So really challenge yourselves and skew the tool rest.
Nice work regardless.
Cheers,
Mac

[DaveTTC]

Hi Mac

My greatest aid was sighting to the ways in the bed. Surprisingly the tool rest was not that straight. The pic with a non parallel rest would moat likely be between adjustments. [emoji6] Matt did not think it would be the challenge it was. Finish was straight off the skew.

DaveTTC
The Turning Cowboy
Turning Wood Into Art

[Simplicity]

Hi Mac

My greatest aid was sighting to the ways in the bed. Surprisingly the tool rest was not that straight. The pic with a non parallel rest would moat likely be between adjustments. [emoji6] Matt did not think it would be the challenge it was. Finish was straight off the skew.

DaveTTC
The Turning Cowboy
Turning Wood Into Art

Matt,
Never said it would not be a challenge your honour.
Matt would also like it put to the court that Matt had only been using the skew chisel for the very first time for approximately an hour before said challenge was put to Matt your honour.
Also your honour let be know that Dave was seen fussing over the tool rest,which Matt graciously draw filled smooth and complainer for Dave.
Before polishing by hand to 360 grit paper.
Also your honour on numerous times Dave was heard to complain that skew was wrong, the tool rest polishing had been done wrong.
The reo in the concrete pad had been laid left to right not right to left.
The cast iron legs on Davis lathe had not settled enough before final machining.
The grinding wheel he was using to sharpen the skew was the wrong type, the moon faze was upset the night before,and the list went on.
I will leave this with you your honour and hope you come to a sensible and swift verdict.


Cheers Matt,

[DaveTTC]

[emoji23]
The accused is acquitted


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[Skew ChiDAMN!!]

:D

May I ask why the tool-rest needed to be filed smooth and polished? It hadn't accidentally been sharpened with a 45degree bevel in an earlier attempt at cutting a 6"wide swathe in one hit? :innocent:

(Which, BTW, doesn't work. Unless you can keep the banjo square to the ways and "wind it in" in a controlled way. DAMHIKT... )

[DaveTTC]

:D

May I ask why the tool-rest needed to be filed smooth and polished? It hadn't accidentally been sharpened with a 45degree bevel in an earlier attempt at cutting a 6"wide swathe in one hit? :innocent:

(Which, BTW, doesn't work. Unless you can keep the banjo square to the ways and "wind it in" in a controlled way. DAMHIKT... )

My lathe has been subjected to the abuse of get together and many first time users or inexperienced. It has taken a beating with some what I assume are significant catches. There were a couple of defining notches in the top edge [emoji22]


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[Skew ChiDAMN!!]

You mean don't keep one tool rest for you and another one for them? Ah, grasshopper. You have much to learn.

[DaveTTC]

You mean don't keep one tool rest for you and another one for them? Ah, grasshopper. You have much to learn.

Funny you should at that .... I suggested to Matt that I need to do just that


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[Skew ChiDAMN!!]

You're right though. It is a challenge and good practice.

I've turned my fair share of rolling pins and consider myself fairly adept at getting them straight and true without calipers, but smaller than that does become more awkward. I think it's because I don't often hold a skew at the angle I need to compensate for the decreased diameter. Moving the rest further away from the piece can help, but the longer tool overhang gives me slightly less tool control.

Mind you, once I'm down to around 1/2" it becomes a lot easier to eyeball again. But then I have to change how I cut anyway, using one finger behind the piece to reduce the spindle flexing.

[DSEL74]

So you are now master of the skew Matt! Put your gouges away.

[Simplicity]

So you are now master of the skew Matt! Put your gouges away.

Absolutely a master of learning to master the skew more [emoji849].