Not exactly 'fixed' but... After trying to recharge my massive Disston that I was using for chainsaw duties I stupidly listened to some YT channels about flattening the blade. Before that I'd just sharpen precisely against the orientation of the teeth. If that makes sense.
Not changing anything about the saw. But, then I decided to remove the breasting (I learnt that after!!) of my £250 or thereabouts, saw. What an idiot. It never cut the same again and I ordered a saw set and put both away for a rainy day.
Yesterday when starting to cut down some lengths to make the base of a cheap bathroom cabinet bottom (under the sink drawers, crap as crap comes but my wife likes em so its fine!!) that we ordered for £300, I decided enough was enough of using my cheap Irwin that I'd bought in the interim.
Pulled out the Marples which was blunt as anything but I didn't fancy continuing to wear out my cheap Irwin on some long rips. So, out came the saw Holder, vice, files, saw set. After a quick check on a few channels and ensuring I don't do something stupid again, I got to work.
Filed the teeth from either side so as not to cause, erm, tracking issues. Before thar I did a very brief grind of the tops of the teeth to bring em all flat (the Marples is not breastfed thankfully). Then got to work with the saw set which didn't really do much as I'm only about 3 or 4 sharpenings in since buying it refurbished (the Disston was an NOS so harder to swallow when I scr*wed it over).
The results... the brown board on the left had an almost square cut that tracked precisely in a straight line. Happy with that and I'll treat myself by making a quick bird feed holder bracket... before getting on with cheap bathroom cabinet/sink duties!!
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Sorry, there's alot of info in that pic and I'll get on with repairing the Disston once I've read up more on how to 'breasting' again.