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Thread: Natural Edge Funnel?

  1. #1
    Join Date
    Feb 2011
    Location
    Ladner BC
    Posts
    42

    Natural Edge Funnel?

    Greetings.
    Today I managed without much difficulty to make my first Natural Edge Funnel.
    Hopefully this was the first and last. I won't embarrass myself further by posting a picture.
    Admittedly I was rushing, trying to finish a small Cherry wet turned bowl and had first turned the outside and a foot while between centres. I next turned it around in my Oneway chuck to finish the inside. Everything was going along fine I managed a great finish on the inside and then turned it again on my small vacuum chuck, to complete the bottom. Things were going good the bowl was about 1/8" thick then disaster struck I managed to make the bottom so thin the chuck just (edited out)ed a chunk from the centre. Now I guess I need to find a market for NE funnels . . .

    But really my question to all of you is, how do you measure or keep track of the bottom thickness when a bowl is reversed or is it a hit and miss proposition?

    I think I heard or read somewhere that there is a fairly simple way to keep track of the bottom but can't remember where I read or heard it.

    Pete
    http://www.woodbowlsandthings.com

  2. #2
    Join Date
    Oct 2006
    Location
    ABQ NM
    Posts
    30,020
    Bummer about the funnel. I've made a few myself.

    I got this one a bit too thin, but managed to avoid sucking the bottom out of the bowl with the vacuum chuck:

    Click image for larger version. 

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    And this one never made it to the vacuum chuck in the first place:

    Click image for larger version. 

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    For a rough measurement, I typically check my bowl depth by holding a tool on the inside center in line with the spindle, then using one eye lined up parallel to the rim, I use my thumb on the tool to mark where the rim of the bowl is. Then I move the tool to the outside of the bowl and compare where the tip lines up on the outside. For a more precise check, I'll set up my hollowing rig (it just takes a couple of seconds), align the laser with the tool tip, then use the laser to spot the exact depth.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  3. #3
    Join Date
    Jul 2008
    Location
    Palm Springs, Ca
    Posts
    1,169
    I do the same - I use a tool and stick it into the bowl center and using my hand I can rough check the measurement - or laser.
    OR...................you can make one of these like I did. They are easy enough and they will quickly and accurately measure your depth. I use the wooden one most of the time.
    The wire one comes in handy if you have a recess instead of a tenon. One end will fit between the chuck jaws and touch the bottom of the recess and the other end touching the bottom of the bowl. Notice there is a black mark on the sliding wire - This will show you the thickness when both points are touching so you know how close you are.

    The cost to make is next to nothing - hardware store has pc's and both made for a few dollars - They work very well.
    Attached Thumbnails Attached Thumbnails Depth-1.jpg   Depth-2.jpg   P1010001.jpg   P1010003.jpg   P1010005.jpg  

    Last edited by Dan Mosley; 10-30-2011 at 05:51 AM.
    First you have to learn the rules - Beginner
    Then you have to learn advanced rules - Professional
    Then you disregard the rules - This takes you to the master level................

  4. #4
    Join Date
    Oct 2006
    Location
    ABQ NM
    Posts
    30,020
    Your wire gauge looks is a great approach, Dan. I may just have to steal that one.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  5. #5
    Join Date
    Jul 2008
    Location
    Palm Springs, Ca
    Posts
    1,169
    I use the laser on hollow forms......stick and dowel on most everything else...........Wire gauge I use on anything made with a recess because it can fit between the jaws and I can get a exact depth.

    If it helps -aluminum rod I got in steel section at the hardware store. Then the fastner is a cable wire nut I got out of the fastner section - little dowel rod I had laying around - Black marker and your done - make a large of an arc as you want (It will work on hollow forms to but the laser of course is best)......................Got the idea myself from someone one the web.....
    Total cost is very very cheap for how good it works......
    First you have to learn the rules - Beginner
    Then you have to learn advanced rules - Professional
    Then you disregard the rules - This takes you to the master level................

  6. #6
    Join Date
    Oct 2009
    Location
    Harrisburg, NC
    Posts
    140
    Peter, you have seen this on other forums. I am only posting it here for turners that may not be familiar with it.

    I made a finder with at $2.50 keychain laser from the bay. I used threaded rod in order to adjust the beam easily but it is not necessary.
    After you make the base, slide it to a drive spur to mark the center spot for lower rod. Make your upper rod an inch or so over your maximum height.
    The white spot on the tape is really red, the camera would not pickup the color because it is so bright.
    This will handle an item 12" deep; probably more than I will ever need.
    Before you reverse it to finish the bottom, take a measurement and place a piece of tape on the exterior (must be sticky enough to survive the rotations when turning). You can then use it again to find how close you are to the tape edge.
    Attached Thumbnails Attached Thumbnails Bowl Laser.jpg  
    All tyranny needs to gain a foothold is for people of good conscience to remain silent. Thomas Jefferson

  7. #7
    Join Date
    Dec 2006
    Location
    Goodland, Kansas
    Posts
    4,834
    Thanks Mike. Had been looking for that idea for a while now.
    Bernie W.

    Retirement: Thats when you return from work one day
    and say, Hi, Honey, Im home forever.

    To succeed in life, you need three things: a wishbone, a backbone and a funnybone.

  8. #8
    Join Date
    Nov 2006
    Location
    Mountain Home, Arkansas
    Posts
    11,834
    It takes real talent to make an inside diameter larger than the outside diameter.
    I developed that skill rather quickly.
    "Folks is funny critters."

    Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire

  9. #9
    Join Date
    Dec 2007
    Location
    Tellico Plains, Tennessee
    Posts
    4,353
    I add a different wood bottom to those and sell them as Boo-Boo Bowls... they seem to go over well...
    Attached Thumbnails Attached Thumbnails 10-1243_0.JPG   10-1243_2.JPG   10-1240_0.JPG   10-1240_3.JPG   10-1240_5.JPG  

    Chuck
    Tellico Plains, TN
    https://www.etsy.com/shop/TellicoTurnings
    My parents taught me to respect my elders, but it's getting harder and harder to find any.
    If you go looking for trouble, it will usually find you.

  10. #10
    Join Date
    Feb 2011
    Location
    Ladner BC
    Posts
    42
    Thanks for the comments/suggestions. I did post this question on multiple boards and got lots of good ideas but as far as a wet turned natural edge bowl goes it looks as if the best solution is to do what I was doing. I just pick a spot on the edged and measure from there to the bottom before I turn it around on my vacuum chuck. The hard part is trying to remember where I take the original measurement. Of course, If I wasn't sanding with wax and mineral oil I could stick on a piece of tape and mark the depth on it as was suggested elsewhere.

    I seem to recall something someone very wise once told me about 'haste' and 'waste'.

    Pete
    http://www.woodbowlsandthings.com

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