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Scollaped edges off Jointer

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Forum topic by unisaw posted 11-22-2014 02:53 PM 963 views 0 times favorited 6 replies Add to Favorites Watch
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unisaw

90 posts in 3594 days


11-22-2014 02:53 PM

I am trying to edge joint boards with my Grizzly 6” jointer. I installed Dispoz A Blade knives two years ago and they seem to be seated properly. They have had very little use. The outfeed table appears to be set at the height of the blades and won’t go any higher. What should I be looking for to get a smooth cut? The effect now is waves that are 1/4” apart along the entire edge.


6 replies so far

View BobLang's profile

BobLang

124 posts in 2861 days


#1 posted 11-22-2014 02:55 PM

One of your knives is higher than the others.

-- Bob Lang, http://readwatchdo.com

View ElChe's profile

ElChe

630 posts in 797 days


#2 posted 11-22-2014 03:36 PM

Try moving fence and joint using a different area of the blades to see if one of the blades is high in one corner or across its entire length. Also try un plugging the jointer. Then rotate each blade to its high spot and slide a straight edge board from out feed table into cutter and see if it hits one of the blades. That would be the high one. Good luck.

-- Tom - Measure twice cut once. Then measure again. Curse. Fudge.

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1770 days


#3 posted 11-23-2014 05:15 AM

Probably the bes way to check to see if one knife is higher than the others is with a dial indicator.

Because the jointer knives travel in an arc, each cut creates a scallop. The ridges between the overlapping scallops are known as mill marks. These can ruin the appearance of your project. To keep mill marks to a minimum, feed the work slowly and use a shallow depth of cut.

-- Alaskan's for Global warming!

View Fred Hargis's profile

Fred Hargis

3928 posts in 1954 days


#4 posted 11-23-2014 01:50 PM



Probably the bes way to check to see if one knife is higher than the others is with a dial indicator.

Because the jointer knives travel in an arc, each cut creates a scallop. The ridges between the overlapping scallops are known as mill marks. These can ruin the appearance of your project. To keep mill marks to a minimum, feed the work slowly and use a shallow depth of cut.

- AlaskaGuy

What he said….the slow feed rate eliminates it.

-- Our village hasn't lost it's idiot, he was elected to congress.

View unisaw's profile

unisaw

90 posts in 3594 days


#5 posted 11-25-2014 04:41 PM

Thanks all. There was a high blade and I replaced it. The results were much better. I’ll replace the others next and pick up a dial indicator. BTW, the owner of Dispoz a Blade called me back first thing Monday morning and suggested the same thing – check the blades. The good news is that this forced me to dust off my jointer plane and experiment with that. It needs a tune-up. The journey back to hand tools has begun.

View AlaskaGuy's profile

AlaskaGuy

2406 posts in 1770 days


#6 posted 11-25-2014 06:53 PM



Thanks all. There was a high blade and I replaced it. The results were much better. I ll replace the others next and pick up a dial indicator. BTW, the owner of Dispoz a Blade called me back first thing Monday morning and suggested the same thing – check the blades. The good news is that this forced me to dust off my jointer plane and experiment with that. It needs a tune-up. The journey back to hand tools has begun.

- unisaw

At 95 dollars it’s the cheapest one you can get but I like this setup for jointer knives.

http://www.oneway.ca/workshop/multi-gauge.htm

-- Alaskan's for Global warming!

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