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waynemorrison
waynemorrison's picture
Sawmill not cutting straight

Whenever I a one inch thick board, by the end it's a half inch thick. Not sure what may have happened as I've had it for a year now with no issues. Thanks for any input.

wayne busse
wayne busse's picture

Wayne, where you been hiding for the last year? Nice to finally have you here on the forum. Now, we need more info, especially which mill so someone with that same mill can help solve your problem.  Also, where are  you from and a little history just cause we are nosey.

Bill
Bill's picture

Not tightening the head secure ?? When you get to the end of the cut take a measurement from the blade to the bunk.

Post Oakie
Post Oakie's picture

Watch the blade as it exits the cut.  If it pops down, that means it was climbing as it cuts.  If so, try a different blade.  Check the tracking and make sure the blade is parallel to the track.  The easiest way is to get the track dead level, then check the blade for level.  How are you tensioning the blade?  As Wayne Busse says, tell us more about the mill, what species you are cutting, and any other info.

DaveM
DaveM's picture

I also was experiencing this.  After finishing the cut, I would have to raise the head about 1/8".  I tried everything & then I noticed that the crank for raising & lowering the head was moving a bit.  There is a tension adjusting knob by the hand crank on the HD36.  Somehow, probably due to vibration, the tension on this adjusting knob had become loose.  Before adjusting this, it was "real easy" to turn the crank to raise & lower the head.  After tightening a few turns, the crank had a bit more resistance.  This seems to have corrected the problem, since on the last 4 logs, I have been able to return the head without raising it.  The boards have been the same dimension from start to finish.  Hope this helps someone !!

r.garrison1
r.garrison1's picture

I've had this happen the last couple weeks too, with a new box of blades. First cut, good. Second cut ends about 1/4 low (on the return, it clears the cant by a bit).

I suspect blade tension; narrow logs don't have a problem. I was cutting a customer's logs (with the request of 'as wide as possible) and I was getting 18" + cants until this. Had to quit since that box was the only 10 new blades I had with me. Now, for the winter season, the sawmill is on the other side of the state, so I'll get back to the other 4 logs in spring. 

r.garrison1
r.garrison1's picture

Yeah, I ran into that and the opposite; the crank was getting real hart to turn.

I sprayed a little WD-40 in the tension area for the crank, and it helped it with a consistent pressure. 

DaveM
DaveM's picture

Did you try to loosen the adjustment knob ?  I'm a bit apprehensive about putting any lubricant on any of the height adjustment apparatus for the saw head.  Slippage would be catastrophic !!

r.garrison1
r.garrison1's picture

I manipulated it while running the hgead up and down, so it was evenly coated.

I did this because I suspect the pressure point was oxidizing and getting a bit crusty.

After I was done, I readjusted the tension to a comfortable level, and it stayed consistent. I think I'll spray it from time to time.

Post Oakie
Post Oakie's picture

The Norwood manual says to lubricate this area frequently.  I use chain saw bar oil, since I figure it will stay put longer.  Never had a problem.  The only time the sawmill carriage lowers on its own is when I'm transporting the mill, bouncing it down the road.  I have found that a quick way to lower the carriage is to press down on the adjustment bolt (in spite of the warning sticker that says not to do it).  Just be careful to keep all body parts away from the crank as it unwinds.  With a little practice, you can control it pretty well.

wayne busse
wayne busse's picture

 The 36 has an adjustment  knob to tighten or loosen the brake, I don't know if the 29 is the same. I use bar oil like Dave does. Post a photo of your brake so we can compare.

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r.garrison1
r.garrison1's picture

On the 29 it is probably the same inside; the only difference I can see is mine has a little bit of a metal shield hiding it, so you can't accidentally have something land on it and depress it.