Woodturner's Resource
Woodturner's Resource  
  Featured Artist    Websites   Support Wr
Tutorials, Projects & Tips   Event Calendar   Tool and Book Store
  Home Page Forum HelpSearch Map TPT Resources LoginRegister
 
Page Index Toggle Pages: 1
Send Topic Print
Digital Protractor is great for cutting segments (Read 692 times)
 
David Muehlbauer
WR Noob
Offline



Posts: 16

Gilbert AZ, Arizona, USA
Gilbert AZ
Arizona
USA

Gender: male
Digital Protractor is great for cutting segments
Sep 30th, 2016 at 4:45pm
 
I'm fairly new to woodturning and segmented bowls. I recently purchased a Digital Protractor to try to increase the accuracy of cutting and sanding my segments. It works great! My rings are much more round and consistent since I started using it. I bought mine for about $20 on eBay, but you can also find one at Home Depot (and probably other places). I use mine to both set my miter saw and disc sander positions, and to check the angle on the segments.
Back to top
« Last Edit: Oct 1st, 2016 at 10:21am by David Muehlbauer »  
 
IP Logged
 
Register To Remove Ads
Ron Sardo
WR Administrator
WR Patron
*****
Online


Chief cook and bottle
washer

Posts: 9,263

Drums, Pennsylvania, USA
Drums
Pennsylvania
USA


PM 3520
Re: Digital Protractor is great for cutting segments
Reply #1 - Oct 1st, 2016 at 7:20am
 
Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register
Back to top
  

Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register
WWW  
IP Logged
 
Ed Weber
WR Global Moderator
WR Patron
*****
Online



Posts: 4,699

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Digital Protractor is great for cutting segments
Reply #2 - Oct 1st, 2016 at 8:31am
 
I have the same model. (I like it)
I originally started with a Wixey and it never was comfortable to work wth. It always felt clumsy to me. When I-Gaging came out with theirs, I waited a while before I bought one thinking it's probably not much different and I'll probably be disappointed again, I was wrong.
Back to top
  
 
IP Logged
 
Bruce Kamp
Active Member
***
Offline


WR Rocks!

Posts: 173

Re: Digital Protractor is great for cutting segments
Reply #3 - Oct 21st, 2016 at 10:24am
 
I have found that these are not accurate enough for segments. At least not as accurate as the wedgie sled wedges. I have two of them and have tried to set the fences on my wedgie sled with them in an attempt to get odd size segments and I just have not been able to set them accurately enough with the digital protractor. I always had to do the half-ring thing to get a perfect circle. They seem to not be off by much but enough to cause me trouble. I am sure others have figured out how to use them and make them work but I haven't been able to yet.
Back to top
  
 
IP Logged
 
Ed Weber
WR Global Moderator
WR Patron
*****
Online



Posts: 4,699

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Digital Protractor is great for cutting segments
Reply #4 - Oct 21st, 2016 at 11:42am
 
Bruce Kamp wrote on Oct 21st, 2016 at 10:24am:
I have found that these are not accurate enough for segments. At least not as accurate as the wedgie sled wedges.


Have you referenced (compared) your digital protractor to your "wedgie' templates?
I am curious to hear how much it is off by
Back to top
  
 
IP Logged
 
Ron Sardo
WR Administrator
WR Patron
*****
Online


Chief cook and bottle
washer

Posts: 9,263

Drums, Pennsylvania, USA
Drums
Pennsylvania
USA


PM 3520
Re: Digital Protractor is great for cutting segments
Reply #5 - Oct 21st, 2016 at 2:36pm
 
Bruce Kamp wrote on Oct 21st, 2016 at 10:24am:
I have found that these are not accurate enough for segments



I'm guessing different brands are more accurate than others. The one I have is dead on. I paid $20-30 from HF about 8-10 years ago.
Back to top
  

Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register
WWW  
IP Logged
 
Ed Weber
WR Global Moderator
WR Patron
*****
Online



Posts: 4,699

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Digital Protractor is great for cutting segments
Reply #6 - Oct 21st, 2016 at 3:57pm
 
If you check their site, they only claim + or - 0.3
I know mine isn't perfect  Angry but it's not off that much.
If I have to, I use a fixed jig or reference of some kind, like setup blocks.
Back to top
  
 
IP Logged
 
Bruce Kamp
Active Member
***
Offline


WR Rocks!

Posts: 173

Re: Digital Protractor is great for cutting segments
Reply #7 - Oct 21st, 2016 at 5:35pm
 
Ed,
Yes I have. I have both a Husky and a Wixey digital protractor. One problem right off for me was the fact that they only go to 1/10th of a degree. So for a 16 segment ring, as an example, I need to set each fence to 11.25 degrees. I couldn't do that with confidence that I was exactly half way between 11 degrees and 11.5 degrees.
To the actual question as to how they measure up to the wedgies themselves. I found them to be off of the stated angle by anywhere from .05 degres to .25 degree depending on the particular wedge I was checking against. That doesn't sound like much but when I have tried to set the fences using the digital protractors it seems to multiply out enough to cause a problem.
This assumes also that the wedgies themselves are cut accurately. The only thing I have to go on is that they seem to work great when I use them to cut segments. I do have to make sure that I have them set tight into the fences. Sometimes I haven't and, boy, did I pay for it. lost some good wood in the process.
Back to top
  
 
IP Logged
 
Register To Remove Ads
Ed Weber
WR Global Moderator
WR Patron
*****
Online



Posts: 4,699

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Digital Protractor is great for cutting segments
Reply #8 - Oct 21st, 2016 at 5:59pm
 
Any amount is too much.
I like mine for basic (carpentry) layout but started to encounter the same issues as you  with finer quality work. While I like it better than the wixey, the accuracy is still an issue.
If you can't rely on it, it's no good
Back to top
  
 
IP Logged
 
David Muehlbauer
WR Noob
Offline



Posts: 16

Gilbert AZ, Arizona, USA
Gilbert AZ
Arizona
USA

Gender: male
Re: Digital Protractor is great for cutting segments
Reply #9 - Oct 23rd, 2016 at 12:07pm
 
FYI ... my digital protractor can read 11.25

In addition to checking the setting for my miter saw and disc sander, I check the angle on a few test wedges and make sure it is correct (i.e., 30.0 for a 12 segment ring). My half-rings are nearly perfect. A very light sanding touch is all that is required.
Back to top
  
 
IP Logged
 
Ed Weber
WR Global Moderator
WR Patron
*****
Online



Posts: 4,699

Wilton, California, USA
Wilton
California
USA

Gender: male

JET 1642
Grizzly G0584
Re: Digital Protractor is great for cutting segments
Reply #10 - Oct 23rd, 2016 at 1:45pm
 
My gauge (same as in photo) is 'off" approximately 0.10 - 0.15 degrees.
As I mentioned above the manufacturer only claims that they are within plus or minus 0.30 degrees.
I'll not be purchasing another unit until the tolerances are much better, I'll stick to a solid  reference block or angle.
JMO
Back to top
  
 
IP Logged
 
Chris Neilan
WR Supporter
*****
Offline


OUCH!

Posts: 787

Waterford, Connecticut, USA
Waterford
Connecticut
USA

Gender: male

Powermatic 3520
Delta 46-460
Shopsmith 10 ER
Shopsmith Mark V
Shopsmith Mark 7 Powerpro
Re: Digital Protractor is great for cutting segments
Reply #11 - Oct 23rd, 2016 at 5:43pm
 
I went the digital protractor way. Was not happy. Went to the wedgie sled method. Made a 181 piece vase with perfect full ring glue ups. Won't be going back.
Back to top
  

Delta 46-460: awesome
Powermatic 3520: more awesome!
Shopsmith Mark 7: Wonderful! (But I don't use it as a lathe yet)
Shopsmith Mark V
Shopsmith 10ER
 
IP Logged
 
Bert Delisle
WR Devotee
*****
Offline



Posts: 1,424

Calgary, Alberta, Canada
Calgary
Alberta
Canada

Gender: male

Vicmarc 300
Re: Digital Protractor is great for cutting segments
Reply #12 - Oct 23rd, 2016 at 9:04pm
 
I had made some wedges for my wedgie sled using a CNC router table. First set wasn't good, found out that the angles were off. Went back and drew wedges with angles to three decimal places. My new wedges are excellent. I made some wedges to do rings with odd numbered segments. Perfect circles every time. My digital unit is history battery died and I won't be replacing them.
Back to top
  
 
IP Logged
 
Page Index Toggle Pages: 1
Send Topic Print