First of all, when I use the term "trimming", to me, it means making the cut just a little bit wider.  In scrolling there is no "untrimming" 

Let me put a picture up that might help:

The red line is the blade and the blue line is my cut.

I am cutting on 3/4" maple with some pretty hairy cuts.  The blade I chose is a Flying Dutchman UR3.  As you can see, the needed cut is a little over twice the width of the blade.  My first cut is down the left side from A to B.  Then I back the blade up and "trim" the right side from A to B.  This was working great until, all of a sudden, this didn't work any more.  Couldn't perform the task.  SOOOOO, being the resourceful guy I am (and cheap) - (ops - meant frugal), instead of changing the blade I tried reversing the procedure.  First cut down the right side and then followed up on the left side.  Worked like a charm.

OK, guys, what changed??????????????

Tooth set????

 

6 hours ago, Gene Howe said:

Tooth set????

What he said, unless the blade twisted slightly. 

The blades are probably stamped out. This might cause the set of the teeth to be to one side or the other.

Edited December 23, 20178 yr by It Was Al B

Might be the direction of  grain of the wood.

Herb

Could be the grain catching it or in my case not cutting a straight line.

If needed I have a small flat file to straighten it up. 

I think I figgered it out.  I think the blade finally got worn out and the side I normally use for trimming is the "rough" side (stamped blade) and the smooth side was still sharp.  Think that makes sense?????

On 12/22/2017 at 10:17 AM, Gene Howe said:

Tooth set????

 

PLUMB SIMPLE, GRAIN CHANGED SOMEHOW.

LET US KNO.