LumberJocks

push back

  • Advertise with us

« back to Woodturning forum

Forum topic by Karda posted 09-22-2021 03:15 AM 316 views 0 times favorited 13 replies Add to Favorites Watch
View Karda's profile

Karda

3376 posts in 1801 days


09-22-2021 03:15 AM

hi, i was turning the bottom of an ash bowl, the bottom is about 6” wide and i have been having an awful time getting this bottom smooth i am putting in more rutts than I am taking out. I was turning down the side and out into the bottom when I got a skip back that was hard enough to push me away from the lathe. The catch wasn’t deep but it ruined my previous turning. What did I do wrong


13 replies so far

View Lazyman's profile (online now)

Lazyman

7996 posts in 2634 days


#1 posted 09-22-2021 03:26 AM

It is hard to tell without seeing how you had the tool rest and the position of the gouge when you were turning. Perhaps you could post a picture with the lathe stopped showing the approximate position and angle.

When doing the bottom when it is already round and fairly smooth, it often means you caught one of the wings of the gouge. It can also happen when you have the tool rest too far away or are using too short of a gouge/handle.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View Kerux2's profile

Kerux2

493 posts in 2979 days


#2 posted 09-22-2021 03:38 AM

Got to start off with… What tool were you using?

And if you were using a Bowl Gouge. What kind of grind? 40/40, Elseworth… etc?

-- Hey I'm Dyslexic! I don't have all day to check and re-check forum post.

View pottz's profile

pottz

20719 posts in 2231 days


#3 posted 09-22-2021 03:45 AM

ya know many turners will make fun of you but maybe start out with carbide tools.yes they are considered “scrapers” but they are easy and safe to use for beginning turners.i use em and love em.enough said.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Karda's profile

Karda

3376 posts in 1801 days


#4 posted 09-22-2021 04:00 AM

I use them, in a situation like this it is a last resort. I have been using scraper but they are making as many ruts as they are eliminating. would the tool skip bask if it hit a high spot or would it follow it. i try again tomorrow but lower the high area first. i have never had this problem before, bottoms have always been a challenge but not this bad

View bigJohninvegas's profile

bigJohninvegas

1100 posts in 2709 days


#5 posted 09-22-2021 04:47 AM

Good questions above, snap some photos with your tool rest as it was and holding the tool as you were at the time of the catch.
Really hard to help you with the right info.

-- John

View Karda's profile

Karda

3376 posts in 1801 days


#6 posted 09-22-2021 04:59 AM

this is the orientation when the catch happened slightly above center. The tool is a 5/8ths bowl gouge with a 16” commercial handle, one day I will make a heavier one.

View Kerux2's profile

Kerux2

493 posts in 2979 days


#7 posted 09-22-2021 05:21 AM

Okay… that is helpful. Looks like an Ellsworth grind. My bet is… you got your handle ahead further towards the tip of the gouge… didn’t realize it and made the catch. And/or, looks like you are a little high from the center. Lower your tool rest so that the tool, will be even with the center of the bowl. You can always angle up as you are farther out from the center… and then work your way down as the cut is being made toward the center of the bowl. another tip is to slow the pace at which you are cutting… which can be an issue.

At the corners… you’ve got rings …. probable because the angle of the grind can’t make that turn? Make sure your grind has at least a secondary bevel. As shown in the picture below… might even need to make a third bevel… or cut the second grind at a steeper angle. OH….. make sure your tool is always sharp. Ash is hard and could be dulling quicker than you are used to.

I use a 40/40 grind mostly… I use the Ellsworth grind when shearing and scraping. And I’ll use a bottom feeder gouge mostly on the bottom of bowls and tight angles. That gouge is 60 degrees. Of course, all of the tools you use need to be what is comfortable for you. There are turners that are die-hard Ellsworth grinds. I have trouble with it… but when the 40/40 grind came along… I fell in love with it…. just matched what my eyes and head were trying to do. Bottom feeder came in when I got tired of messing up with a half-round-nosed scraper.

Have you watched many videos on turning? I can recommend a few YouTubers, that know what they are doing.

-- Hey I'm Dyslexic! I don't have all day to check and re-check forum post.

View Karda's profile

Karda

3376 posts in 1801 days


#8 posted 09-22-2021 06:14 AM

thanks for the tips i’ll get the tool rest lowered first thing, I was scrapping and forgot to lower it. The gouge does have a second bevel but it is ground almost away. i ground an old gouge to 40/40 and i love it but I can’t keep it from getting pointed and I am grinding way to much to get it sharp, its a waste of steel the way i do it and what I do just don’t match the videos/ Thats my biggest problem is copying the videos, hard as I try I just can’t get it right. With this bowl I am learning all over because I haven’t don a bowl this wide in awhile. I have watched many videos but I’d appreciate your suggestions

View Kerux2's profile

Kerux2

493 posts in 2979 days


#9 posted 09-22-2021 04:43 PM


thanks for the tips i ll get the tool rest lowered first thing, I was scrapping and forgot to lower it. The gouge does have a second bevel but it is ground almost away. i ground an old gouge to 40/40 and i love it but I can t keep it from getting pointed and I am grinding way to much to get it sharp, its a waste of steel the way i do it and what I do just don t match the videos/ Thats my biggest problem is copying the videos, hard as I try I just can t get it right. With this bowl I am learning all over because I haven t don a bowl this wide in awhile. I have watched many videos but I d appreciate your suggestions

- Karda

40/40 Grind is hard to do. If you are using a One Way Wolverine sharpening system. You can get a jig that makes the 40/40 grind a breeze.

https://www.ronbrownsbest.com/index.php?route=product/product&path=20&product_id=737

-- Hey I'm Dyslexic! I don't have all day to check and re-check forum post.

View Karda's profile

Karda

3376 posts in 1801 days


#10 posted 09-22-2021 06:07 PM

I have seen that jig, I would have if I had a vari grind my jig is fixed a 45 degrees. I try a shear scrape when leveling after a tenon. most of the noise is when I am removing the tenon cutting toward the center, the closer to center the louder it gets. The kast tenon I removed I had know noise. I loosened the live center, well see if that worked I haven’t removed another yet

View prazbotta's profile

prazbotta

43 posts in 522 days


#11 posted 09-22-2021 09:03 PM

You don’t need a jig to get the 40/40 grind, just practice. I did buy a jig, but only after I was pretty proficient at sharpening lathe tools.

This video I think does a pretty good job of explaining it.

View Kerux2's profile

Kerux2

493 posts in 2979 days


#12 posted 09-23-2021 04:36 AM



You don t need a jig to get the 40/40 grind, just practice. I did buy a jig, but only after I was pretty proficient at sharpening lathe tools.

This video I think does a pretty good job of explaining it.

- prazbotta

That’s not easy thing to do for most… and that is why the Jig is so great. No experience necessary.

-- Hey I'm Dyslexic! I don't have all day to check and re-check forum post.

View Karda's profile

Karda

3376 posts in 1801 days


#13 posted 09-23-2021 06:03 AM

yea that is a good video

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com