• A New Photo Gallery Has Been Added!!! Please share pictures of your finished projects in the New Photo Gallery for everyone to enjoy browsing. The New Photo Gallery is for FINISHED PROJECTS ONLY!! The New Photo Gallery section was created to give people a place to view photos without having to read through all the threads. Enjoy everyone and please contribute!

bottom problems

Karda

Member
Full Member
Messages
610
Reaction score
184
Location
Elmira, New York
First name
Mike
why is this happening. when I scrape the bottom of the bowl where I took off the tenon this happens, it is a gouge in one side some time it is deeper

r elm.jpg
 

woodtickgreg

scroll, flat, spin
Staff member
Global Moderator
Founding Member
Full Member
Forum Moderator
Messages
17,280
Reaction score
22,048
Location
Eastpointe, Mi. usa
First name
Greg
When I reverse a bowl to clean up the bottom and remove a mortice or a tennon I put the bowl up against my cole jaws to keep the bowl flat and true.
Like this. 20200425_160012.jpg
 

Steve in VA

Member
Full Member
Messages
1,026
Reaction score
1,990
Location
Virginia
First name
Steve
As Greg referenced, it's most likely due to the bowl being slightly off when you reverse it to take off the tenon. When the bowl is spinning, because it's not flat and true as Greg shows on his cole jaws, your gouge cuts slightly on the one side and completely misses the other side.

How are you reverse mounting your bowl in order to take the tenon off Mike? Share a few pictures if you can.
 

trc65

Member
Full Member
Messages
2,423
Reaction score
6,352
Location
Cameron, Illinois
First name
Tim
I do as Greg does, and that works for me most of the time. I still though, occasionally, have the same problem that you do. Whether the wood moved because of stress relief, moisture changes, or user error, doesn't matter, you still have to deal with it. Most times I use 60x sandpaper on my drill and even things out while it is spinning.
 

barry richardson

Moderator
Staff member
Global Moderator
Full Member
Messages
9,452
Reaction score
14,750
Location
Buckeye AZ
First name
Barry
I think The wood probably moved a little as stated above, especially if there was a day or so between turning the bowl, and finishing the base.
 

Karda

Member
Full Member
Messages
610
Reaction score
184
Location
Elmira, New York
First name
Mike
I have figured out a couple things that contribute to the problem, most of the grooving is caused by is cause by the wing corners when I scrape with the gouge also the jamb chuck I use for bigger bowls has padding on the face but it don't completely cover all the wood, that was causing the bowl to wobble. I am using a different jam chuck, chuck mounted and I am sure of its squareness and my turnings still are uneven just not as bad. the last bottom I did i got a bad groove' I stuck my spindle gouge in it and made a feature. There is a definite depth difference. I use a tail stock steady
 
Top