Checking the jointer for accuracy

http://woodgears.ca/jointer/accuracy.html
After six months, and a change of season, time to check if the wooden jointer is still accurate.

Category:

Howto & Style

Tags:

• wood
• jointer
• accuracy
• kinves
• planer

[autexcbaty]

Shouldn't the knives of the jointer be even with the outfeed table - not slightly higher? Doesn't that put a slight taper on the cut? just curious...

[Matthiaswandel]

They need to protrude slightly. The wood has a tiny bit of give as the knives hit it. And if the knives cut just s tiny bit less than the outfeed table, the stock ends up climbing up as it moves so the knives cut nothing at all. Better to protrude slightly.

[apatientspider]

Perhaps your knives measured a bit lower near the fence on your wooden jointer due to wear. Isn't that end where you jointed some plywood not long ago?

[Matthiaswandel]

Wear makes much less of a difference. Those nicks I put on the knives with the plywood only made ridges .001" high. I found the lower nut nearest that corner holding the outfeed table wasn't tight anymore. Tightening that up put it back to where it used to be.

[PhilStPierre]

Nice video! I was wondering about the unit you use to measure the gaps. What's a "thou" in millimeters ?

[Matthiaswandel]

A thousandths of an inch. 1 "thou" is about 0.025 mm.

[deezynar]

Since moisture migrates faster from the ends of boards than the center, its good to have a slight hollow for glueing up. Having more width at the ends allows for a bit more shrinkage to occur before a crack opens up. I think you did a great job on making and setting up your jointer.

[stygn]

@YoWooDDecks In relations to humidity it doesn't matter what you do because you would get a problem anyway. One way of "fixing" it is to have a humidifier that can both increase the humidity when it's too low, and decrease humidity when it's too high. They're not super expensive, and really easy to use. Though with a large workshop you would need a big and expensive one, or several small ones. And it uses electricity of course, so that would add to the electricity bill in the winter..

[ongxizhe]

I didn't know there's this much depth into carpentry. I feel stupid now.

[theorganguy]

@Matthiaswandel LOL

[jkrsecret]

Probably was from the start there.

Great job.

[bytesilver]

@5:10 : 62 boul Hymus Pte. Claire H9R 1E1

wow I work like 5 minutes away from there.... awesome... Your from montreal are you? (Yes i know that company probably ships there rulers all over canada...) would be cool if you did live in montreal

[Matthiaswandel]

It's better to make it in the summer if it's summer, and better to make it in the winter if it's winter. Because otherwise, you have to wait so long!

[boner2008]

6:02 New Hardware Found. Damn Gremlins...