Ok, so Paypal should work internationally. When I was looking into it I read that it only work in a few countries out side the US, the web site I was at must of been sponsored by a wire transfer service...
Thanks.
Thanks.
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Show posts MenuQuote from: Fernando on April 09, 2019, 05:13:48 PM
just great.
I only have one question, how much does the tool weigh?
Quote from: RickKrung on April 07, 2019, 09:44:13 PMQuote from: MPeppard on April 07, 2019, 09:11:03 PM
Using the adjustment screw's pitch (4-40) to set the offset would be one way to do it, but I think its much easier just to test it with the knife installed.
Ken S mentioned this method a few times where you can do an easy check with a V-block and vertical marking surface (a wide base wax candle work well).
Place the knife and jig on the V-block with the blade horizontal and slide the marking surface up to the blade and make a reference cut. Rotate the knife/jig over 180 degrees and recheck. If the two marks are in the same place, then the blade is centered. If the marks are off, you would need to adjust the blade half the distance between the two marks, which is a bit easier with the adjustable offset because you just turn the screw to align it.
I kind of like this method because it takes into account a lot of variables at once, like blade thickness, how the blade is mounted in the jig and if the edge is off-line from the spline.
I am about half way done on a blade alignment fixture that uses an USB microscope to center the blade, probably a bit over-kill but I think I can get a few other uses out of it.
Nice. I do not recall having heard of the V-block/wax candle method. Very slick. I like it and will use it to test the shims in the modified jigs. As you say, actually checking the blade is better than indirect methods.
What USB microscope are you using? I looked at them last fall, in particular some from DinoLite. Unfortunately, I was not satisfied with the resolution of even their top end scopes. I was especially interested in their models that have focus stacking. A very handy feature. In that process, I did find some third party apps for focus stacking, which freed the search from just those scopes that do it natively.
I'll be very interested to see more on how you might use the scope for centering. For the level of accuracy most of us need, it seems like the V-block/was method would suffice nicely.
Rick
Quote from: RickKrung on April 07, 2019, 07:42:02 AM
Congratulations. Very impressive. Exactly the kind of thing I like to make. I'm just a bit jealous I didn't think of it. Looks to be some mighty fine work.
Knowing the thickness of a blade, how do you go about adjusting the dovetail for the necessary offset? Do you go by the height of the step of one dovetail to the other? The screw looks to be of a fairly coarse pitch. Are you able to use the rotational position of the "leadscrew"? For example, an #8-32 screw with a thread pitch of 32 tpi has 0.032" per rotation. One-quarter turn = about 0.008". One-quarter turn should be easy enough to gauge using an allen wrench. A 40 tpi thread gives 0.025" per revolution (same as an inch micrometer), but that means eye-balling 1/5th turns for 0.005" increments.
I modified several jigs by milling part of the jaw away, as per Wootz's jigs and use shims for centering the blade. Also, not a DIY for most. I made a table with blade thickness in 0.005" increments. The change in shim thickness, per 5 thou. increment is 0.0025", which rounds to either 0.002" or 0.003" in my table. I made it into a PDF file (attached) and have that on my phone for easy reference at the workstation. I also keep a printed copy of it, but they get trashed after a while.
Please show (or tell) us your setup procedure.
Rick
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