Author Topic: Why doesn't someone make .......  (Read 13564 times)

Offline Graham

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Why doesn't someone make .......
« on: July 18, 2014, 08:18:33 AM »
A banjo / toolrest combo with rack and pinion gearing ( or something ) for precise movement of tool rest height ? Got to be better than the 'Golden Shot' approach.
Regards
Graham
I have learnt the first rule of woodturning.
The internal diameter should never exceed the external width.
Nor the internal depth, the external height.
Does that make me an expert now ?

Offline John

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Re: Why doesn't someone make .......
« Reply #1 on: July 18, 2014, 09:38:42 AM »
Hi I have three lathes and 9 different tool rests I swap them around as required. If they had a rack and pinion system this would make it very time consuming to change rests
Why do you need the fine setting a millimeters either way wont make any difference to the turning. Just vary your tool angle slightly, I do this without thinking.
John
John English

Offline Bryan Milham

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Re: Why doesn't someone make .......
« Reply #2 on: July 18, 2014, 11:26:26 AM »
Now if I could have anything different on a lathe, I'd go for a power winder on the tail-stock.

2 speeds, slow in for drilling, fast out for getting it wound back quickly, those little wheels are a pain!
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Offline Paul Hannaby

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Re: Why doesn't someone make .......
« Reply #3 on: July 18, 2014, 12:20:48 PM »
You could always add a compound slide to your lathe but it would just mean it took longer to adjust the rest!

Offline edbanger

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Re: Why doesn't someone make .......
« Reply #4 on: July 18, 2014, 01:20:22 PM »
Or you could buy a metalworking lathe

Offline bodrighywood

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Re: Why doesn't someone make .......
« Reply #5 on: July 18, 2014, 02:48:19 PM »
You can get one Graham if you go for one of these type of lathes. My friend has one which has a motorised bed, turns up to 8' over the outside and I think it is about 14' along the bed. The tool rest can be moved up or down by jacking it up not just pulling. Cost you a bit more than your average lathe though and you would need a larger workshop.

Pete
Turners don't make mistakes, they have design opportunities

Offline Graham

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Re: Why doesn't someone make .......
« Reply #6 on: July 18, 2014, 03:05:18 PM »
You can get one Graham if you go for one of these type of lathes. My friend has one which has a motorised bed, turns up to 8' over the outside and I think it is about 14' along the bed. The tool rest can be moved up or down by jacking it up not just pulling. Cost you a bit more than your average lathe though and you would need a larger workshop.

Pete

Just the job. I might get two of those and keep one just for Sundays  :)
Regards
Graham
I have learnt the first rule of woodturning.
The internal diameter should never exceed the external width.
Nor the internal depth, the external height.
Does that make me an expert now ?

Offline Les Symonds

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Re: Why doesn't someone make .......
« Reply #7 on: July 18, 2014, 05:38:19 PM »
...... you would need a larger workshop......

I could put my whole workshop on that lathe.

Les
Education is important, but wood turning is importanter.

Offline Graham

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Re: Why doesn't someone make .......
« Reply #8 on: July 18, 2014, 06:18:12 PM »
...... you would need a larger workshop......

I could put my whole workshop on that lathe.

Les
look on the bright side. You could 'turn' your workshop so it faced the sun :)
Regards
Graham
I have learnt the first rule of woodturning.
The internal diameter should never exceed the external width.
Nor the internal depth, the external height.
Does that make me an expert now ?

Offline happy amateur

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Re: Why doesn't someone make .......
« Reply #9 on: July 19, 2014, 04:47:54 PM »
Graham

I can't remember who but a demonstrator had collars made up or made his own, can't remember.
Different heights which he used on the stem between the rest and the banjo.
Sounds a bit fiddly to me but for him it worked.

Fred

Offline john taylor

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Re: Why doesn't someone make .......
« Reply #10 on: July 19, 2014, 06:06:02 PM »
I use jubilee clips on the tool posts so it is much quicker to adjust them and they are always at the correct height.

john

Offline Graham

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Re: Why doesn't someone make .......
« Reply #11 on: July 20, 2014, 09:11:42 AM »
But John, surely the correct height varies according to the tool you are using. Though it would give a good base line for quicker adjustment.
Regards
Graham
I have learnt the first rule of woodturning.
The internal diameter should never exceed the external width.
Nor the internal depth, the external height.
Does that make me an expert now ?

Offline MCB

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Re: Why doesn't someone make .......
« Reply #12 on: July 21, 2014, 12:54:38 AM »
But John, surely the correct height varies according to the tool you are using. Though it would give a good base line for quicker adjustment.


I  have a few (large) washers that support the tool rest above the banjo

It's very easy to add or remove one to make minor adjustments to the height

MCB

Offline bodrighywood

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Re: Why doesn't someone make .......
« Reply #13 on: July 21, 2014, 02:24:36 AM »
It is beginning to sound as if the height of the tool rest is an exact science. As long as your tools are attacking the wood at a safe height a few mm here or there don't matter a jot. How far away from the wood is far more important. The only time I start getting as precise as some of you are sounding is when I hollow out my goblets with a spindle gouge and want to go straight to the centre.

pete
Turners don't make mistakes, they have design opportunities

Offline Bryan Milham

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Re: Why doesn't someone make .......
« Reply #14 on: July 21, 2014, 09:00:21 AM »
I'm with Pete,

I've seen a couple of people use things they can slide over their tool post for setting exact centre but never for general turning.

In fact and as I've said before, modern lathes toolrests come so that they can't be lowered much past centre height, really only useful for scraping cutting. Which is why I had a couple of toolrests made when I bought my new lathe.

I can see how a rack and pinion might be useful for for some people to adjust the toolrest height but not a static set height, you'd need a different toolpost for each tool!
Oh Lord, Lead me not into temptation…

...Oh who am I kidding, follow me, I know a shortcut!