Incra Finger Joint Jig

[JHG]

I've been learning how to use this device and managed to make a small box out of maple. The joints fit together well, but I noticed that on the back side of each piece there is a small amount of tear out. The dado blades were just sharpened, so the culprit isn't a dull blade. I supposed the tear out could be sanded out, but it would require a substantial amount of sanding. Anyone else encountered this? Ideas?

Thanks,
John

[algale]

I've been learning how to use this device and managed to make a small box out of maple. The joints fit together well, but I noticed that on the back side of each piece there is a small amount of tear out. The dado blades were just sharpened, so the culprit isn't a dull blade. I supposed the tear out could be sanded out, but it would require a substantial amount of sanding. Anyone else encountered this? Ideas?

Thanks,
John

I don't own that jig, but a scrap piece behind the work piece eliminates tear out for most sawing or milling operations.

[woodmeister]

if the piece by the miter gage is wider than the cutter it will tear out. Like he said a piece behind it will help too. Even tape will do the trick but another hassle. When you find a good project to build with the system let us see them. I have one too but need a nice project other than a box.
HAPPY NEW YEAR!!
Tom

[N5omniac]

I recently just made a simple box joint jig using the miter gauge and scrap wood. Sadly I only had the stock ripping blade ((need to order a 5/8" arbor)) but even with that the end product was very satisfying. I agree, use a sacrificial board to help with tear out