|Forum topic by GAVol||posted 03-23-2010 06:15 PM||4804 views||0 times favorited||3 replies|
03-23-2010 06:15 PM
When I run a board through the planer, I get a fairly smooth board. However, if I run the board thru a second time without making any adjustments to the height, I get knive marks spaced about 1/8” apart all down the board. Questions:
1. Is this because one of the knives is set lower than the other two?
This is my first planer. I’ve been restoring a Powermatic 15 Planer I bought used at an estate sale. It had sat unused and had quite a bit of rust. In the process I had to remove the knives. When I put the knives back in, I initially tried to use the PM Knive adjustment tool, but found the knive settings to be very inconsistent.
So, I used a pair of dial indicators to fine tune the knive settings. I numbered the knives (I, II and III). I zeroed out both dial indicators on the smooth part of the roller. I then set the knives to be .055 higher than the roller, which seemed to be the approximate height using the adjustment tool. There was no height specifications for the knives in the manual.
I thought I had gotten the knives set consistently, but apparently I did not. I also checked and adjusted the Infeed roller, chip breaker and outfeed roller to be .040 higher than the knives per the instruction manual.
Before I readjust, I need to know the probable source of the problem(s) and what I did wrong.