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Post by fidelfs on May 29, 2016 16:31:09 GMT -5
I was making a few cuts today and notice something.
I marked the piece using my Japanese marking knife. I placed the rail close to the mark and using the same knife as a stop, I moved the rail to have the splinter guard next touching the knife.
I verified the rail place several times, I used the clamps to keep it secured.
I cut the piece and I noticed that the knife mark still there in the piece I just cut. That means the blade (original Mafell) runs a little to the right of the splinter guard ( the red rubber edge).
I wonder if I need a replacement or I just didn't cut it correctly the first time.
Any ideas?
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Post by reflector on May 29, 2016 17:24:25 GMT -5
For clarification: You used the body of the knife as the physical stop against what I assume is a chisel grind and not a vee grind?
I don't suppose you have another rail with a strip in different condition to compare against the rail you used? The only discrepency I notice with my rails (Bosch flavor) is that if I don't clamp I find that maybe less than a sliver of material can be left after the cut whereas if I clamp them down the rubber strip effectively is where the cut ends.
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Post by fidelfs on May 29, 2016 19:20:55 GMT -5
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Post by holmz on May 29, 2016 22:55:43 GMT -5
If you do a scoring cut then the blade moves over 0.1-mm (0.004"). So once a score have been done then it should be ever inside.
How accurate are most people ? My cuts are usually +/- 0.4 mm using the rails... Which is pencil marking using a tape, placing and clamping the rail, and then checking post-cut with the same tape.
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Post by charley1968 on May 31, 2016 9:26:17 GMT -5
Yes, you might have cut the splinterguard wrongly and yes, you might have to buy a new one. It depends what margin of error you find acceptable. During my apprenticeship the Meister always told us to work to the mm. That's roughly 1/25 inch. I never saw any sense to go beyond that. So, if the difference is approx. 1mm, i'd change the guard. In the UK and NA a lot of people seem to use 1/32 as their standard of accuracy. So, it's up you. As you're using a marking knife i guess you're working very accurately, hence i'd probably buy a new splinterguard.. I think there are videos on youtube on how to cut the splinterguard correctly..
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Post by holmz on May 31, 2016 15:05:12 GMT -5
( I am not sure how to translate Kentucky windage to English)
once the cut is complete then look down and see how far the guard is from the cut... then use that offset as you guide for how far to offset.
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