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Large Taper when jointing

2K views 5 replies 6 participants last post by  JohnnyM 
#1 · (Edited by Moderator)
Hey everyone. I am excited to be back in the shop more and more lately. I bought some air dried rough cut lumber with the live edge still on it, and started to dimension it last night. Very exciting! Very frustrating also. While practicing on a less desirable pieces I had to take a bow out and on the joiner took it down about 1/4" by the end I had 1" on one end and 3/4" of thickness on the other, even after alternating feed ends. I'm sure it's my technique but not sure what I'm doing wrong. Any ideas?
 
#5 ·
FMG, A couple of questions.

How long are the infeed outfeed tables on your jointer?
How long is / are the boards in question?
How was the bow positioned in relation to the cutter / tables?
If the bow was positioned so the crown was up along the length, how hard did you press downward?

There are some really good guys on here and as Don said there are quite a few threads here.

The hand plane guys could probably understand your technique issues better, if the lumber is longer than your infeed table. BTW, you should check coplaner on your tables and the knives to outfeed table relationship.
 
#6 ·
I like the jointer for shorter pieces, less than about 3'. Anything longer I run through my table saw against an 8' piece of MDF so the entire piece is against the MDF and the MDF is sliding against the fence. Similar idea to Chipy's but I do not clamp it. Just keep the butt ends even as I feed it. I always start with the concave side to the mdf first to prevent rocking while I am feeding.
 
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