Looking for advice for rounded corner frames - Router Forums
 3Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 06-26-2016, 09:37 PM Thread Starter
Registered User
 
Join Date: Jan 2016
Country: United States
First Name: Tom
Posts: 5
 
Default Looking for advice for rounded corner frames

Hello,

I have a small shop in my garage and am struggling on building on a rounded cabinet. I am a novice woodworker and am looking for advice about building rounded corner cabinets. This is the first time I’ve tried to build a rounded cabinet. Not sure if I am doing this correctly, but am a giving it a go. If my terminology is incorrect, or if I need to post to another forum, please forgive me as a am just learning.

I have the built the carcass out of ¾” plywood. I have the pieces cut to length, and pocket holed into the face frame. The face frame is assembled, and a am trying to assemble the rounded corners. I have the bottom attached on the right and left side. The Right side is giving me problems as the rounded moldings are spitting and or cracking.

I have am running into a few problems as the rounded molding keeps spiting and cracking. I cannot figure out to fix the issue or continue with ruining the cabinet.

If anyone has any suggestions or advice, it would be greatly appreciated.

Thank you,
Tom
Attached Thumbnails
Click image for larger version

Name:	Top of Rounded Corner v0.JPG
Views:	149
Size:	77.2 KB
ID:	221970  

Click image for larger version

Name:	Midde 2 Transition Piece-Left Side v0.JPG
Views:	119
Size:	68.8 KB
ID:	221978  

Click image for larger version

Name:	Midde 1 Transition Piece-Spit Right Side v0.JPG
Views:	119
Size:	77.6 KB
ID:	221986  

Click image for larger version

Name:	Midde 1 Transition Piece-Left Side v0.JPG
Views:	116
Size:	79.2 KB
ID:	221994  

Click image for larger version

Name:	Bottom of Rounded Corner Left Side v0.JPG
Views:	111
Size:	75.4 KB
ID:	222010  

Click image for larger version

Name:	Bottom of Rounded Corner-Tearout Right Side v0.JPG
Views:	103
Size:	60.7 KB
ID:	222018  

Click image for larger version

Name:	Example cabinet v1.0.jpg
Views:	123
Size:	648.2 KB
ID:	222026  

firstmuller likes this.
perseus7717 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 06-26-2016, 09:49 PM
Registered User
 
JOAT's Avatar
 
Join Date: Apr 2010
Country: United States
First Name: Theo
Posts: 6,117
 
Default

Not 100% sure what's going on here. You using screws, or nails, to hold those pieces, and there is splitting because of that? I don't make things like that usually, but when, I do I only use glue, no nails or screws. But not to worry, if that's not it, one of the guys who makes furniture on a regular basis will come along, and should give you a answer.

"It ain't what you're told, it's what you know." - Granny Weatherwax
Gather the villagers, pitchforks, torches; we march at dusk!
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.
JOAT is offline  
post #3 of 12 (permalink) Old 06-26-2016, 10:08 PM
Forum Contributor
 
DesertRatTom's Avatar
 
Join Date: Jul 2012
Country: United States
First Name: Tom
Posts: 16,081
 
Default

I agree on the glue. Can't quite make out the grain on the rounded pieces, but if you have pocket holes going in with the grain, that could cause splitting. You must pre drill that kind of joint on that grain or risk splitting. Glue will hold those shapes forever, although clamping could be a challenge.

The more I do, the less I accomplish.
DesertRatTom is online now  
Sponsored Links
Advertisement
 
post #4 of 12 (permalink) Old 06-26-2016, 10:14 PM
Forum Contributor
 
Stick486's Avatar
 
Join Date: Jan 2013
Country: United States
First Name: Stick
Posts: 25,142
 
Default

Tom..
what are your fastening methods???
why are you doing this in sections.....

rip a piece ½-¾'' (or more if you can) ply the width and length of the assembled corner piece...
careful on the fit..
glue the sections to the ply.. use a 23GA pinner to pin the ply to the molding but no larger...
glue the assembly to the face frames and mechanically fasten through the back w/ screws being careful to screw into the ply only..
add blocks to add to thickness for the screws if you can...

the splits are because of the early or spring wood of the pieces...
and it doesn't tolerate mechanical fastening w/o preventive measures...

Early wood or Spring wood

1. Formed during spring season.
2. Formed early in a year.
3. Consists of xylem tissues with wider vessels.
4. Produced more in amount.
5. Less dense.
6. A broad zone of wood.
7. Not as strong as late wood.

Late wood or Autumn wood

1. Formed during winter season.
2. Formed after the early wood.
3. Consists of xylem elements with narrow vessels.
4. Produced less in amount.
5. More dense.
6. A narrow zone of wood.
7. Stronger than early wood due to larger volume of wall materials.

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”

Last edited by Stick486; 06-26-2016 at 10:17 PM.
Stick486 is online now  
post #5 of 12 (permalink) Old 06-26-2016, 11:05 PM
Moderation Team
 
Cherryville Chuck's Avatar
 
Join Date: Sep 2010
Country: Canada
First Name: Charles
Posts: 14,995
 
Default

Tom..
what are your fastening methods???
why are you doing this in sections.....

rip a piece ½-¾'' (or more if you can) ply the width and length of the assembled corner piece...
careful on the fit..
glue the sections to the ply.. use a 23GA pinner to pin the ply to the molding but no larger...
glue the assembly to the face frames and mechanically fasten through the back w/ screws being careful to screw into the ply only..
add blocks to add to thickness for the screws if you can...

the splits are because of the early or spring wood of the pieces...
and it doesn't tolerate mechanical fastening w/o preventive measures...


Tom all of that is true. What is cracking your wood is too much stress being put on it. I fully agree with Stick when he says to bridge the corner with ply and then attach the round piece to the ply. Let the ply handle the stress. It's better suited for the job. One of the other possibilities is that the wood may have started with too much moisture content and has dried since you started. Even if that isn't the cause now, it could be the cause of a later failure. Wood cells build up from the center of a tree in layers. Each layer of cells is longer than the previous one so that the outer layers shrink more when it dries than the inner layers. This will cause cracks and breaks if not allowed to move freely.

If you do like Stick suggests I would only attach the piece at its center but it could be attached very firmly if only there. That would allow movement at either end without causing the piece to crack. I personally would try to either rabbet or mortise the ends of your corner pieces into either side at least 1/8". That way if there is shrinkage there won't be a visible gap at the ends where they meet the sides.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
Cherryville Chuck is online now  
post #6 of 12 (permalink) Old 06-27-2016, 08:43 AM Thread Starter
Registered User
 
Join Date: Jan 2016
Country: United States
First Name: Tom
Posts: 5
 
Default

Thank you everyone for all the information on the post!

The wood is Alder. The fastener system is the pocket hole system (Kreg).
The fastener system is indeed a problem here! I used the pocket hole system because I couldn't figure out how to clamp the face frame. Even with 1-2 pocket holes pre-drilled and glue, I could not get the alignment perfect (or at all). My method was to use my figures and hold the rounded pieces into the face frame... Not ideal at all, but I couldn't figure how to hold, clamp, align, glue the pieces, hence the post here :-)

Definitely, I need help with the system that will hold, clamp, align, glue the pieces.
Thanks!
Tom
perseus7717 is offline  
post #7 of 12 (permalink) Old 06-27-2016, 08:59 AM Thread Starter
Registered User
 
Join Date: Jan 2016
Country: United States
First Name: Tom
Posts: 5
 
Default

Hi Stick,

"why are you doing this in sections....."

The section are purely decoration. See example below.

Thanks!
Tom
Attached Thumbnails
Click image for larger version

Name:	example of molding v0.jpg
Views:	44
Size:	327.8 KB
ID:	222114  

perseus7717 is offline  
post #8 of 12 (permalink) Old 06-27-2016, 11:26 AM
Forum Contributor
 
Stick486's Avatar
 
Join Date: Jan 2013
Country: United States
First Name: Stick
Posts: 25,142
 
Default

Quote:
Originally Posted by perseus7717 View Post
Thank you everyone for all the information on the post!

The wood is Alder. The fastener system is the pocket hole system (Kreg).
The fastener system is indeed a problem here! I used the pocket hole system because I couldn't figure out how to clamp the face frame. Even with 1-2 pocket holes pre-drilled and glue, I could not get the alignment perfect (or at all). My method was to use my figures and hold the rounded pieces into the face frame... Not ideal at all, but I couldn't figure how to hold, clamp, align, glue the pieces, hence the post here :-)

Definitely, I need help with the system that will hold, clamp, align, glue the pieces.
Thanks!
Tom
masking tape and a 23 gauge pinner...
DaninVan and MEBCWD like this.

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
Stick486 is online now  
post #9 of 12 (permalink) Old 06-27-2016, 12:13 PM
Registered User
 
DaninVan's Avatar
 
Join Date: Dec 2011
Country: Canada
First Name: Dan
Posts: 13,992
 
Default

And GLUE, Stick, and glue.
DaninVan is online now  
post #10 of 12 (permalink) Old 06-27-2016, 12:16 PM
Forum Contributor
 
Stick486's Avatar
 
Join Date: Jan 2013
Country: United States
First Name: Stick
Posts: 25,142
 
Default

Quote:
Originally Posted by DaninVan View Post
And GLUE, Stick, and glue.
covered that already Dan...
try to keep up...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
Stick486 is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Floating Corner Shelf JIMMIEM Tools and Woodworking 16 01-07-2015 08:50 AM
Picture Frames Part 2 dmc_md General Routing 12 02-27-2011 10:43 PM
Making picture frames dmc_md General Routing 9 02-10-2011 08:51 PM
Reference to a corner cubbard Bob-O-Link New Member Introductions 2 09-15-2010 12:44 AM
Corner Radius bobj3 Tools and Woodworking 25 09-29-2007 06:51 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome