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Forum topic by kmetzger posted 07-05-2015 05:48 PM 1033 views 1 time favorited 9 replies Add to Favorites Watch
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kmetzger

147 posts in 1281 days


07-05-2015 05:48 PM

Here’s the result of my attempt to turn a square candle holder. I figured out how to mount it, but something went badly wrong. I mounted the square blank on a glue block, shaped the bottom and cut a 1 5/8” recess to fit my Nova pin jaws. Following these instructions https://www.canadianwoodworking.com/plans-projects/candle-holders I left about 1/4” uncut at the rim. I then reversed the blank and turned the inside. But instead of getting the flat wings I was trying for I got this: and this:

I would greatly appreciate your ideas on what I did wrong.

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25


9 replies so far

View bondogaposis's profile

bondogaposis

4028 posts in 1815 days


#1 posted 07-05-2015 05:53 PM

You cut too deeply, thereby removing the wings.

-- Bondo Gaposis

View TheDane's profile

TheDane

4997 posts in 3126 days


#2 posted 07-05-2015 10:54 PM

Bondo Gaposis has it right … in these interrupted cuts where you are cutting air as well as wood, it is easy to get too aggressive. Don’t ask me how I know this!

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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kmetzger

147 posts in 1281 days


#3 posted 07-05-2015 11:53 PM

On my third try I’m getting closer. But it still doesn’t look like Bob Hamilton’s even though I’m using the same size blank (well a little thicker – mine was 1 3/8” thick). The sides on the bottom don’t match the original that I’m trying to imitate.

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25

View Steve Peterson's profile

Steve Peterson

324 posts in 2546 days


#4 posted 07-09-2015 11:36 PM

The 2nd one is looking better. Maybe cut a bit more off the bottom to get the center portion of the wings a bit thinner. I would take it over to the belt sander and lightly touch all 4 sides to sharpen the corners before finishing it.

-- Steve

View LeeMills's profile

LeeMills

271 posts in 764 days


#5 posted 07-10-2015 02:43 AM

I am horrible at trying to explain anything but…Like Steve said, more off of the bottom. Both to get the wings thinner and to decrease the diameter of the bottom bowl shape which will make the wings more pronounced.

Bob, in his instructions about half way down said “Cut the rim to a consistent thickness. You can’t really see what is happening with the lathe running, so you need to stop the lathe frequently to check your progress.”

As well as stopping frequently it helps to have a neutral back drop. I use a shade but a piece of white poster board will work the same to seen the outline better while spinning. The wings can still be hard to see but at least there is not “clutter” behind to make it worse.
When you stop and check you can make a pencil mark on your tool rest to help show you where more attention is needed.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

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kmetzger

147 posts in 1281 days


#6 posted 07-10-2015 02:52 AM

I finally made one that looks much more like Bob Hamilton’s. I had trouble visualizing the final shape. Bob sent me some videos and advice and things went a lot better. Here’s what Bob wrote: “It looks to me like you haven’t taken enough wood off. :D Once you have the outside shape the way you want it you have to turn the inside shape to the same profile in the areas where it is an interrupted cut in order for the rim to be a consistent thickness all the way around. In other words, as you cut the interior shape your gouge should be moving parallel to the outside surface. Once you have cut past the “square” and into the fully round area then the interior shape no longer has any effect on the rim and you can level back out and start to come back up to the candle hole.”

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25

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kmetzger

147 posts in 1281 days


#7 posted 07-10-2015 01:24 PM

Resized photo.

-- Kim, Ajijic, Mexico, http://tinyurl.com/7w5fm25

View LeeMills's profile

LeeMills

271 posts in 764 days


#8 posted 07-10-2015 03:12 PM

I’m glad Bob Hamilton was able to put into words which for some (like me) is difficult to describe. Guess that why he is a good teacher.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

View BurlyBob's profile

BurlyBob

3676 posts in 1729 days


#9 posted 07-10-2015 09:24 PM

Yours look pretty darn good. I think you did a really fine job. I know I could not do anything like that!

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