Hello Petter; So what method are you using to set your knifes? Also, do you have a good technique on the jointer? Getting lumber square and flat is hard to do. If you are a little out here and a little out there they mount up into big errors. I try to do the best I can but it isn't ever good enough.
Lowered the infeed table down. A furniture maker helped me out, by giving me a planed piece of timber, to use the moving forward ruler method x 5mm on both sides of the outfeed table, being sure same movement on both edges of the outfeed table and adjusting so same movement which I did. Machine knives have springs underneath, released lock nuts used the machines jig to set the height of knives to cutter block. Jig is like in attached images . Mine is one with red arrow and looks very similar and used in the same way as the one with the cir clips on the end. On my old jointer I tried using a one way multi gauge TDC method as well as moving ruler method. Old planer wasn't up to it, so upgraded to a more professional job.
With new planer I was struggling quite a bit to set the knives up correctly in the cutter block, later I found I could lower one side of the outfeed table so I got same movement using ruler method on both sides of outfeed table.
I think the Axminster engineer who advised me about setting the knife height correctly, thought I was getting a bit obsessive with the accuracy, come precision part of things, this is what he told me. Perhaps I still have some overlap, on getting the timber precisely square.
" I tried one last time earlier today. I lowered the outfeed table so could get the ruler to move by 4mm.
Knife three moves the ruler by 4mm, knife two by 6mm and knife one by 2mm. I didn't bother to check the movement at the other end of the block as would have had the same inconsistent results. "
This is what he said.
"The difference in height of the blades is amplified in the distance the straight edge moves across the bed.
I mentioned in my previous email the scale you are working to (0.10mm is roughly 5mm of travel) therefore;
1mm of travel on the straight edge is about 0.02mm so the height above the outfeed table you have is around 0.04, 0.08 and 0.12mm. This will work fine, the material will grow or shrink a lot more than that depending on the weather.
Setting the machine this precisely is a bit like setting your car tyres so the O of Goodyear lines up with the valve for balancing purposes, not necessary."
He also said timber would move fractionally as fed through the machine.
My feeding method I'm using is hand over hand, light pressure. I think I'm doing it quite well.... though I dread to say.... but not perfectly
