Curt, you did a pretty clever thing to get indexing and gears to work together. Thank you for the reminder and suggestion, but I had already addressed that issue. Your design uses the same principles, so a vernier could be adapted to your setup by making a new arm to hold the vernier scale and pin. I like your setup because everything is locked in it's place without the risk I have of friction slipping.
If you add more holes and a new vernier arm (with a loose pin like a spindexer) you could address any number of divisions without further modifications. A 72 hole ring minimum diameter is about 6". A 10 hole vernier arm needs to be about 3 3/4" broad, and thick enough to hold the loose pin without wobble. You could address all divisions without having different index plates. You may recall that some time ago I made a modification to the index gear mount so that it turns freely on the lathe spindle shaft while an index arm that is secured to the lathe spindle shaft (by very tight bolt friction) engages the holes on the index plate. I referenced that situation in a recent previous post, noting that if this mod isn't made, this vernier thing isn't going to work I made a two piece bushing to make this happen.This allows me to make as many starts as an index ring will permit using whatever cutter I choose. For all but the most demanding spirals, I do not have to calculate circumference vs cutter diameter, and never have to move the frame to "index". Now, the high counts of checkering indexing motivated the special vernier setup. Checkering a cylinder does require a very tight relationship between circumference and number of starts. Cutter diameter is irrelevant, but DOC is because that effectively changes the diameter and thus the circumference by 2X the DOC. DOC is tiny, but has a significant impact on field coverage and sharpness of diamond points. DanK On Friday, October 13, 2023 at 12:27:40 AM UTC-4 Curt George wrote: > Hello Everyone. (Im home form work now.) > > Dan, ONE quick question for you. > > How are you going to combine the two together? Meaning Checkering uses the > gears and indexing dose not? > > One suggestion. I made a while back a roping index system for my > machines. It combines both elements of indexing while letting me use the > gears at the same time. > Here are some photo's and a video link. > https://www.youtube.com/watch?v=AYb-fe4GS8M > > Its a very simple jig to set up and use. And it just might help you out > with your indexing ideas? > If you want more details please ask. > > Have a good night. > > C.A.G. > > > On Thursday, October 12, 2023 at 05:58:44 PM EDT, cdkr...@gmail.com < > cdkr...@gmail.com> wrote: > > > The first effort at vernier arm was only semi successful. In my CAD drawing > I didn't make the vernier holes 1/4". I had left them at 3/16" so the > drawing > indicated that there was material between the holes. But when I drilled > the > second hole, I realized the error of my ways. Doh! And on top of that, > the arm > must have slipped on the index head because the holes almost lined up but > not > close enough for the pin to work. Now what? A vernier is a fixed thing, > right? > And I feared the project was doomed. > > Then I remembered reading about adjusting the span of the vernier. Found > it, applied it and it > worked! So now I have 1/4" holes in the arm for a pin that tapers into a > 3/16" hole on > the index gear plate. TMI to explain here how it worked out, but man, was > it slick! > [image: vernier1.JPG] [image: vernier2.JPG] > > So, next up. A little shaping on the arm, test if the pin works and apply > it to > the REVO for more cuts on the checkering field. > DanK > On Thursday, October 12, 2023 at 4:34:38 PM UTC-4 Tim Ziegler wrote: > > Wow Dan I am impressed. Very good and great pics. > I'm excited to look more into your creation for sure. > > Kind Regards, > > Timothy J. Ziegler > Ziegler WoodWork & Specialty > Ziegler Laser Worx LLC > 14171 160th Ave. > Foreston MN 56330 > > 320-294-5798 shop > 320-630-2243 cell > > On Thu, Oct 12, 2023 at 10:37 AM cdkr...@gmail.com <cdkr...@gmail.com> > wrote: > > Made it happen, but here's the previous setup for the index plate. > [image: Capture.JPG] > > I don't have a metal piece big enough to make the index > arm that gets the 9 holes at 4.5°, so I'm back to a 1/2" > thick piece of acrylic. It will last long enough to verify > that it works and checker the sample handle with 21 > lines per inch (LPI) at a 60° helix angle. This should > cover the handle with a field of durable diamonds. > DanK > On Thursday, October 12, 2023 at 9:33:53 AM UTC-4 cdkr...@gmail.com wrote: > > The index arm (unique to my REVO) will be broad enough to > span 10 holes spaced at 4.5°. To get the index head setup, > the formula is first divide 360 by 4.5 to get the number of > divisions needed. So that sets up the ratio 90:80 = 9/8=18/16. > I'll use the last ratio with a 16 hole index plate on the dividing > head (the same one used to create the 72 hole circle) but this > time instead of moving 20 holes each drill peck, I'll move only > 18 holes. The sector arms will adjust to span 2 holes. > Now...."Make it so." > Pictures pending. > DanK > > On Thursday, October 12, 2023 at 7:22:35 AM UTC-4 Tim Ziegler wrote: > > Great now to just remember to delete the old ones. > > Kind Regards, > > Timothy J. Ziegler > Ziegler WoodWork & Specialty > Ziegler Laser Worx LLC > 14171 160th Ave. > Foreston MN 56330 > > 320-294-5798 shop > 320-630-2243 cell > > On Thu, Oct 12, 2023 at 5:58 AM cdkr...@gmail.com <cdkr...@gmail.com> > wrote: > > SUPER! And a big thank you to Bill. Now I can update the pitch chart > AGAIN. > > DanK > > On Thursday, October 12, 2023 at 1:56:03 AM UTC-4 bulk...@mmnet.com.au > wrote: > > I had a few min in the shop today and I remembered dan asking about the 2x > gears set tooth count so…. > > 240,20 duplex gear and 120 index gear > > > > Bill > > -- > > You received this message because you are subscribed to the Google Groups > "Legacy Ornamental Mills" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to legacy-ornamental...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/legacy-ornamental-mills/f2968fb7-e8ae-4095-ae33-21d57d9da47dn%40googlegroups.com > > <https://groups.google.com/d/msgid/legacy-ornamental-mills/f2968fb7-e8ae-4095-ae33-21d57d9da47dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "Legacy Ornamental Mills" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to legacy-ornamental...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/legacy-ornamental-mills/02d3df46-5f4c-439c-a2a6-757c3ad5df01n%40googlegroups.com > > <https://groups.google.com/d/msgid/legacy-ornamental-mills/02d3df46-5f4c-439c-a2a6-757c3ad5df01n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "Legacy Ornamental Mills" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to legacy-ornamental...@googlegroups.com. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/legacy-ornamental-mills/25142994-f0d7-4ead-b3b6-0dbd34bfdf2cn%40googlegroups.com > > <https://groups.google.com/d/msgid/legacy-ornamental-mills/25142994-f0d7-4ead-b3b6-0dbd34bfdf2cn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. 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