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22nd September 2008, 08:18 PM #16Senior Member
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I have always set the blades half a bees dick higher than the outfeed table.
I am talking a very small amount. Forget the infeed table for a minute.
1. You need a small piece of wood say 100mm long 10mm x 10mm.
2. Mark on one face 3 marks at 3mm spacing starting at 75mm from one end. we should have one mark 72, 75,78.
3. On the outfeed table place this piece of wood so the 75mm mark lines up with the edge of the outfeed table. Edge closest to the cutter block.
4.If you rotate the cutter block slowly the blades will come around and catch the piece of wood. The idea is one of the knives will lift the piece of wood and drag it a distance of 3mm. 3mm will give you a very tiny amount of blade showing above the height of the outfeed table. If it is more than 3mm raise the out feed table or lower it till you have close to 3mm of travel. In reality this is a very tiny amount showing about the outfeed table.
This assumes all blades are the same and the tables are both in the same plane. i tried to take some pics to show you but the camera is flat..sorry.
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22nd September 2008, 09:59 PM #17
Yep your blades need to be higher than the outfeed table. Why;
when the blade takes it's cut it takes a scallop out of the timber leaving a hollow, the next cut is slightly behind the first which leaves a slight peak between the cuts, this peak is what rides on the outfeed table. The height of the "peak" depends on cutter speed, number of blades, feed speed (this needs to be consistent) (faster feed speed higher the peaks), and timber softness/hardness.
my jointer has a setting jig which sets the blade and carries a straight edge about 6mm when the cutter is rotated, this is usually good for most jobs, but when edge planing long boards that must be spot on, I fine tune.
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