Use a degree wheel to measure how much you've allowed it to rotate without the crank moving. 6° is usually a good safe number. I don't advance all saws though.
Well, if you want to calculate how much to remove for a given number of degrees, it is approximately:
(Crank Diameter)/2 * sin(Advance Angle)
So if your crank is 10mm and you want 3deg advance, then: 5 * sin(3) = 0.26mm = 0.010"
The other way to calculate it is:
(Crank Diameter) * PI * (Advance Angle) / 360
So for 10mm crank: 10 * 3.14 * 3deg / 360 = 0.26mm = 0.010"
I would go easy with it. If it revs up nice with good throttle response it's probably good. I've gotten decent gains from 3deg, and one saw is at 6.
For a 10mm crank I get 0.021" for 6deg. Not sure what crank diameter you used or where the numbers come from, but 0.004" is likely about the keyway clearance..004 is 6 deg advance.that is very little off the keyway?
.004 is 6 deg advance.that is very little off the keyway?
Would someone else look at the first formula 5 mm x the 3 degree advance angle =15 . Am I missing a number ?? to use for this formula. Were, how did the 15 become 0.26mm.Well, if you want to calculate how much to remove for a given number of degrees, it is approximately:
(Crank Diameter)/2 * sin(Advance Angle)
So if your crank is 10mm and you want 3deg advance, then: 5 * sin(3) = 0.26mm = 0.010"
The other way to calculate it is:
(Crank Diameter) * PI * (Advance Angle) / 360
So for 10mm crank: 10 * 3.14 * 3deg / 360 = 0.26mm = 0.010"
I would go easy with it. If it revs up nice with good throttle response it's probably good. I've gotten decent gains from 3deg, and one saw is at 6.
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