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Tool Use Subtlety Discoveries? (Read 175 times)
 
Don Stephan
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Tool Use Subtlety Discoveries?
Nov 17th, 2019 at 8:32pm
 
I wonder if there might be a workable way within the forum to share "tool use subtleties?"  Every book and DVD covers the basics on tool use, such as the skew, but frustration and inefficiency are always just around the corner and there is not a simple resource.

As one example of a skew subtlety, for some time when trying to increase the width and depth of a V cut with the skew long point, sometimes all would be great and other times after starting a new parallel cut the long point would jump to the middle of the existing V.  I would get frustrated (always a bad thing), try more pressure (always a VERY BAD thing), and sometimes be rewarded with the dreaded spiral enhancement.

Don't know if I was finally trying to study what was happening, but a few months ago when this was happening again I discovered if I moved the skew back from the wood ever so slightly the long point was not jumping into the middle of the existing V, and I realized the edge of the bevel was rubbing the top of the V and pushing the long point sideways.  Similar in concept to the bevel heel rubbing in the transition zone inside a bowl.

I could have posted a question about the long point jumping into the middle of a V cut, but sometimes well meaning responses will continue for months, and it is expected there can be hundreds of such subtleties for every type of gouge, skew, scraper, . . .

Some sort of collection of advanced tips, discoveries, subtleties, whatever term is used, would be of tremendous value.  The moderator/accumulator/librarian would have to have more experience and smarts than I to recognize and summarize them, but what a value it would be.
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Ed Weber
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Re: Tool Use Subtlety Discoveries?
Reply #1 - Nov 18th, 2019 at 9:29am
 
Don Stephan wrote on Nov 17th, 2019 at 8:32pm:
I wonder if there might be a workable way within the forum to share "tool use subtleties?"  Every book and DVD covers the basics on tool use, such as the skew, but frustration and inefficiency are always just around the corner and there is not a simple resource.


I know exactly what you're saying but I'm not quite sure how to go about presenting it.

Much of the subtleties you speak of are IMO, simply learned technique and a very individual experience. Call it practice or trial and error, many time there is no substitute for hands on experience. The subtleties often have more of a feel than simply mechanical technique which can't always be adequately conveyed by text, photos or even video.
That being said, knowing what you're doing, beyond where or how you arrived at the situation that's giving you an issue goes a long way.

I know the last sentence sounded a bit harsh but I'll try to explain.
Beyond how you approach the cut, every species can act and react differently to being cut. This also applies to each tool, each grind, different RPM's, different lengths or diameters of blanks or billets, and so on.
There are times when someone has an issue like the example you raised, when the answer isn't a tool technique, subtle or not. It may in fact be one of the items I listed though they might not seem to be related.
As an example, changing speeds can reduce vibration and chatter but has nothing to do with tool presentation but will improve the quality of the cut.

All I can say is that it's possible to build a collection of these types of tips but there will never be a consensus.
The phrase, "ask ten turners get twelve answers" comes to mind.

If there is enough interest around this subject, we'll seriously look into it.
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John Grace
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Re: Tool Use Subtlety Discoveries?
Reply #2 - Nov 18th, 2019 at 11:34am
 
Don Stephan wrote on Nov 17th, 2019 at 8:32pm:
I wonder if there might be a workable way within the forum to share "tool use subtleties?"  Every book and DVD covers the basics on tool use, such as the skew, but frustration and inefficiency are always just around the corner and there is not a simple resource.


Though I've never had one, this is that one time where I'd recommend a woodturning mentor.  The types of nuances and subtleties you've described are difficult to impossible to capture in the myriad of videos.  Good luck...
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Mike Mills
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Re: Tool Use Subtlety Discoveries?
Reply #3 - Nov 18th, 2019 at 12:18pm
 
I would suggest Alan Lacers video on the skew if you can find a copy.  He covers every cut and what causes problems.  About 23:45 in this video Allan Batty talks about 1 minute after (or before) 12:00.  It sounds like you are losing that gap; as soon as the upper part of the blade touches the wood you have a spiral almost every time.  You may not be able to keep a "1 minute" distance, you may need to keep 4-5 minutes due to control or eyesight.  I'm guessing my gap would be 3-4 minutes.
The same gap applies whether with cutting a straight end or making a V cut, either way the cut is straight it just depends on where you are aiming.

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