Replies

1. 
   hammer1 | Jun 01, 2011 12:08am | #1

   The outfeed table needs to be lowered just a hair. Place the blade from a combination square on 8", move the cutterhead, adjust the table so the square moves 1/16", not more, as the knife tip rotates. When cutting, transfer your pressure from the infeed to the outfeed table once there is enough bearing surface on the outfeed, about one quarter to one third the length of the board.

   
2. 
   MrHup | Jun 01, 2011 12:23pm | #2

   followup to jet jointer question

   Thanks for the reply.

   I'm a little confused by your.jpg attachment. I see you have a wrench on the cutter head assembly. Do I only move the outfeed table, or do I need to adjust each of the three cutters. These seem to be all at the correct height. Are you suggesting that start with the outfeed table and the cutters be inline, then lower the outfeed table until I see about a 1/16" gap? Again, thanks for your advice.   Larry

1. 
   hammer1 | Jun 01, 2011 11:06pm | #4

   I'll try to explain the method I use, there are others and some use a wood stick rather than the blade from a combination square. Always unplug the machine, don't trust a switch. The square blade should be in good condition, straight and not dinged up on the edge. I place the 8" mark even with the edge of the outfeed table, the longer part of the blade resting on the outfeed. I use the wrench as a lever to rotate the cutterhead instead of my thumbs, just a gentle back and forth motion so the tip of the knife contacts the square blade. The tip of the jointer knive will grab the square blade and slide it ahead it as the head rotates. Doesn't sound too scientific but it works like a charm. You can do this to set the knives and/or to set the height of the outfeed table in relation to the knives. You will see that you can tune the table in so that the square blade will move consistently. Check both ends of each knife and in the middle. If the knives are set correctly, each position you place the square blade in, on all knives, should move the same amount. I look for that movement to be 1/32" - 1/16".

   I don't know how you verified that your knives were even with the outfeed table. If they are, you only need to make a slight adjustment to the outfeed table height. If the jointer knives are level with the outfeed table, you get a bit of "ride up" due to resistence, more so with a very fine cut. It gets progressively worse as the knives wear. Jointers are a bit sensitive to this adjustment. If the outfeed is too low, you get snipe on the end of the board, outfeed too high and you get what you described. It's obvious when you have it right because your board edges will come out like you dreamed with a minimum of passes. Your jointer knives will last a lot longer if you keep the passes to a minimum and don't try to make extra fine cuts, which usually require extra passes right on the very fragile tips. In other words, don't over do it in an attempt to be precise. If one pass does the job, don't take an extra one. Check the knives again after some use, a slight adjustment may be needed.

1. 
   MrHup | Jun 02, 2011 11:14am | #5

   Jointer reply

   thanks again for the explanation. I haven't tried the adjustment, but it gives me the background I need to fine tune the jointer.

3. 
   MrHup | Jun 01, 2011 12:23pm | #3

   followup to jet jointer question

   Thanks for the reply.

   I'm a little confused by your.jpg attachment. I see you have a wrench on the cutter head assembly. Do I only move the outfeed table, or do I need to adjust each of the three cutters. These seem to be all at the correct height. Are you suggesting that start with the outfeed table and the cutters be inline, then lower the outfeed table until I see about a 1/16" gap? Again, thanks for your advice.   Larry

4. 
   salamfam | Jun 02, 2011 03:38pm | #6

   To rotate the cutter head safely

   Larry,

   Im fairly sure that the wrench is only in the cutter head so that Hammer can rotate the cutter head without risking his hand near the sharp blades.