Incra I-box

[Dan Kopack]

Just recently purchased the Incra I-box jig. After setting up the jig and cutting the first joint(call it the front board), I then began the second joint ( call this the side board). After completing the second cut, and then checking the "fit" of the two joints, I learned that each successive joint on the second board had moved incrementally. Meaning they continued to move throughout the cut. Making sure the thumb screw on the top of the jig was tight(locks the settings in place)I began cutting another piece of stock. This time checking the adjustment after each cut, the adjustment moved!! What am I doing wrong?? What have I forgotten to do?? Anyone else experience this issue or am I just an idiot and should give up woodworking and take up bridge?

Thanks.

[Charles Lent]

Do you have a dial or digital caliper? You will need to measure the pin and space (notch) widths. They should be the same within a few thousandths of an inch. If not the same, check the width of the fingers in the jig. My guess is that you didn't get the fingers to "just touch" the blade in your jig calibration steps.

Don't give up woodworking. I get as much enjoyment solving little problems like this as I do in making projects. The I-Box jig works very well, once you understand it and get it set up correctly. Attached are a couple of photos of some of my recent box joints in Baltic Birch plywood using my I-Box jig, my Unisaw, and a Freud SBOX8 blade set.



Charley

[Jason Lester]

On a box joint, when they progressively get worse and worse, your setting is usually slightly off. The reason it keeps getting worse is you're compounding the error on each successive cut.

[David Eisenhauer]

Stupid questions
Is your box stock all sized correctly for width, square and parrallel sides?
Did you mark the faces and orient the edges correctly when setting up for the matching cuts on the second board to the first cuts board?

[Jared Sankovich]

As stated your adjustment is off.

These are 12.5" tall drawers with 1/4 pin size. Cut 4 at a time
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[Dan Kopack]

Mine is dial, thank for the suggestions.

[Dan Kopack]

Makes sense, I’ll keep practicing

[Dan Kopack]

Thank you, mine were 13.5”

[Dan Kopack]

Yes, did all that, thanks

[Dan Kopack]

Yes, did all that, thanks, more practice needed.

[Charles Lent]

Begin with a more careful re-calibration.

Charley

[Dave Cav]

I don't have any pictures to show you, but mine worked perfectly right out of the box. Keep trying and pay attention to the settings and the instructions, maybe watch the videos on Youtube; you'll figure it out.

[Dan Kopack]

Will do, the you tube videos make it look soooo easy

[Dan Kopack]

Should I make the fitting of the pins in the cut tighter?

[Butch Spears]

Dan, as others have said ! The IBox is Great. Pay closer attention to where they tell you about pin touching the blade. I got scrap and set mine up the first time. But I had to play with it, to really understand what they were saying. not directions fault,but my wanting to be in a hurry. Start from set up and start over. You will be pleased that you did. Good Luck