The Problem With The Incra Miter Gauge - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 05-28-2012, 03:55 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default The Problem With The Incra Miter Gauge

The Incra Miter Gauge is an outstanding tool and I have been impressed with it until now. The problem that I am having with it is not necessarily the fault of the gauge. The problem that I am referring to is that in order to get the most out of it is that in the end the user, in my case, myself, has to do the final calibration and if that is not done perfectly, the real accuracy of the gauge is lost. I have mine calibrated so that all of my 45 degree cuts are as good as I would ever like them to be, but when cutting six workpieces at 30 degrees, the result is off just enough to tell me that either the gauge is not perfectly calibrated, or the gauge is not as accurate as I have been led to believe that it is.

The slight error that I am talking about, is admitedly slight, but it does exist and I want a miter gauge that is dead on, this one might be, but the issue of calibration rests with me and it's giving fits.

Jerry
Colorado City, TX
Jerry Bowen is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 05-28-2012, 06:26 PM
Retired Moderator
 
Mike's Avatar
 
Join Date: Nov 2004
Country: United States
First Name: Mike
Posts: 11,921
 
Send a message via Skype™ to Mike
Default

Jerry, you can use a plastic drafting triangle to set your angle and then calibrate your miter gauge so it is exactly on. Once the calibration is set you should have no future problems.

Mike
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"
Mike is offline  
post #3 of 17 (permalink) Old 05-28-2012, 10:00 PM
Registered User
 
Join Date: May 2012
Country: United States
First Name: Wayne
Posts: 146
 
Default

I'll agree with Mike. Once it is set up correctly it should be on. I double check my miter gauge when making cuts. I have set ups for 45* 30* and 22.5* i use. Mine is not an Incra but hoping to buy one soon. I have found that cutting a setup jigs is the best way to go. Mine has not left down yet.
WayneMahler is offline  
Sponsored Links
Advertisement
 
post #4 of 17 (permalink) Old 05-29-2012, 08:03 AM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

This is addressed back to Mike as well as any one else that says that their gauge is dead on. Are you saying that if your miter gauge is set correctly that when you cut the six parts at 30 degrees that if the cuts are made with the the parts firmly again the fence that e all six joints are absolutely tight? Then with that calibration your 45 degree cuts are also dead on.

Right now, when I make the cuts, I am gettin an error on .003" when the parts are four inches in length. That is close, but not dead on. When I make 45 degree cuts I can decern no error at all.

Jerry
Jerry Bowen is offline  
post #5 of 17 (permalink) Old 05-29-2012, 08:08 AM
Registered User
 
cagenuts's Avatar
 
Join Date: May 2010
Country: South Africa
First Name: Hilton
Posts: 522
 
Send a message via Skype™ to cagenuts
Default

Jerry, watch this video.

How do you know the initial cuts are indeed 45 degrees? Even the Wixey digital gauges have a margin of error. So again, it's best to follow the linked video, make the appropriate adjustments until you get it correct. It then doesn't matter what any gauge is telling you.
cagenuts is offline  
post #6 of 17 (permalink) Old 05-29-2012, 12:32 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

Hilton,
The way I conclude that my cuts are at 45 degrees is when I cut a picture frame and clamp it up with a clamping strap and the joints fit perfectly with no gaps at all, to me this dead on at 45 degrees, am I missing something. As to the Wixley digital gauge, it's a cute gadget, but a far cry from a precison instrument, and was a waste of money in regard to being used for any precision work.

Jerry
Jerry Bowen is offline  
post #7 of 17 (permalink) Old 05-29-2012, 12:56 PM
Retired Moderator
 
Mike's Avatar
 
Join Date: Nov 2004
Country: United States
First Name: Mike
Posts: 11,921
 
Send a message via Skype™ to Mike
Default

Jerry, you are worried about .003" when working with wood? Breath on it and it will change to be perfect. Once the gauge is calibrated by using a triangle it will be dead on in all positions. You should check out the Betterley Una-Gauge here: Betterley Industries

Mike
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"
Mike is offline  
post #8 of 17 (permalink) Old 05-29-2012, 02:25 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

Hey Mike,
Maybe you have found the problem, maybe I'm to picky, but to me .003 inch gap that you can see light through is, or has been, dut to my ingnorance, unexceptable. I just order an Osborne miter gauge and want see how it works compares to my Incra gauge, if I still have the same error with the Osborne gauge, I will know than my expectations are just greater than what is possible with these high end miter gauges.

Jerry
Jerry Bowen is offline  
post #9 of 17 (permalink) Old 05-29-2012, 03:25 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

Getting back to Hilton's suggestion to watch the video about tuning the miter gauge. I had watched that video before posting my remarks about the Incra Gauge. After makeing the twelve 30 degree cuts on six workpieces and seeing that the miter gauge was not spot on, the error was extremely small but did exist. The question then becomes, how does one get that last thousandth of an inch or so error out of the setting. Yes, you sure know that error exists, but how can you adjust it out without using some trial an error method. That's the rub as far as I can see. I cannot detect any error with my machinist square wieh checking 90 deree cuts, but error does exist when doing the drill as shown in the video, but thanks for the suggestion anyway.

Jerry
Jerry Bowen is offline  
post #10 of 17 (permalink) Old 05-29-2012, 04:00 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

Mike,
Can you tell me a little more about the triangle that you are referring to, I am not familiar with one and would like to know more about one as to it's accuracy, it's rigidacy etc. If you read this, I hope that you will respond, also, is there a way to contact you directly through this forum or some other way, you seem to stay on top of the posts that I am making and you also seem to be pretty savvy about woodworking.

Jerry
Jerry Bowen is offline  
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
Kreg Miter Gauge vs. Incra Miter Gauge Jerry Bowen Tools and Woodworking 8 06-04-2012 09:58 AM
INCRA 1000HD Miter Gauge for Router Table Geordie99 Table-mounted Routing 3 12-30-2011 11:05 PM
Use an old miter gauge with t-track loninappleton Table-mounted Routing 10 05-25-2011 08:17 PM
Miter gauge roofner Tools and Woodworking 8 04-07-2011 12:20 AM
PC plunge router depth gauge problem codgerbill Portable Routing 5 03-25-2010 09:50 AM

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