Here's my $0.02 on the clamping matter upon the rotary table. I have (made) a Longworth chuck and as Bill mentioned it is not a strong holder nor necessarily a repeatable accurate locator, though it may be close enough for woodwork. It might be improved with bushings in the slot that fit better than the 1/4" threaded bolts. I put Tommy bar holes in mine that help a lot. As Bill mentioned, different "jaws" that do the actual holding might work better than the rubber feet, e.g. toothed pads, screw points through the pads, or something aggressive like that. If the scrolls were in a (stronger) metal plate the angles could be much shallower and act like the scroll behind a 3 jaw chuck.
Now if you are a fair dinkum engineer with a rotary table linked to the X axis travel you can cut a suitable ACME scroll in plywood or plastic (nylon or delrin) plate and in the same setting mill the T slots for the clamp pad (jaws) in another circular plate. Milling the matching scroll on the jaws fitted to the T slot might be tricky. Like building a squashed flat 3 jaw chuck. Clearance is severely limited for a regular 3 jaw metalworking chuck. I saw a video yesterday of a carving table modified with self centering clamp jaws that act like the little jeweler's clamp shown, which I also have. It was basically two blocks opposing each other in a T slot connected within the oversized slot (below table surface) with a double ended screw, LH on one end and RH on the other. I have a bunch of them already threaded (7": LH and 9" RH 3/8-16 x 18" OA or vice versa I don't remember) and might just try something like that. I made a dozen very large hand screws and messed up the threading locations, but the threads are fine. Pay shipping and one or more could be yours. I think there are 12. My first plan for locating was cross hairs and concentric circles, all cut with a tiny vee bit. I've found as Tim mentioned that double stick tape is sketchy, both for locating and holding security, though I got by with it machining the plastic quilting template for wife (mentioned earlier). Then I lusted after T slots and hold downs like on my metal working equipment. I have a giant indexing head with tilting 3 jaw chuck, but it's out of the question to use on (or near) the REVO. If push comes to shove, I'll just move the operation to the metal mill! But now that I've remembered these threaded rods laying in the "resource bin", I just might tinker with a self centering pad jaw setup. Combined with T slot clamps might be all one needs. DanK P.S. Thanks for the additional Austrailian vocabulary. I'm building a small dictionary..... On Monday, June 27, 2022 at 6:45:08 AM UTC-4 timjz...@gmail.com wrote: > WoodPecker or Rockler has lots of clamping methods similar to that though > that might work. > Still would not solve the actual centering challenge. I just am looking > for a quicker method of > the actual centering too mainly. > > Kind Regards, > > Timothy J. Ziegler > Ziegler WoodWork & Specialty > 14171 160th Ave. > Foreston MN 56330 > > 320-294-5798 <(320)%20294-5798> shop > 320-630-2243 <(320)%20630-2243> cell > > On Mon, Jun 27, 2022 at 12:47 AM <bulk...@mmnet.com.au> wrote: > >> Yes I would like a set of those but I don’t think legacy sells them >> online anymore >> >> >> >> Bill >> >> >> >> *From:* 'Curt George' via Legacy Ornamental Mills < >> legacy-orna...@googlegroups.com> >> *Sent:* Monday, 27 June 2022 1:40 PM >> *To:* legacy-orna...@googlegroups.com >> *Subject:* Re: Anyone try one of these? >> >> >> >> https://www.youtube.com/watch?v=pzeS7MN9qlA Legacy video on there cnc. >> hold down table. >> >> >> >> C.A.G. >> >> >> >> On Sunday, June 26, 2022 at 11:12:35 PM EDT, bulk...@mmnet.com.au < >> bulk...@mmnet.com.au> wrote: >> >> >> >> >> >> Well if it’s a blank ready to start I would set the job dead centre first >> with nothing but the bear block now if its moving too easy making it >> difficult to set up put a block of lead on top that will stop it moving too >> easy and stop the dial indicator moving it too if it’s a round piece your >> setting up. >> >> >> >> Then after its true screw blocks of similar thickness wood against the >> work (4 pieces 2 screws in each) then mark a spot on the work and a block >> >> Remove the lead and your job put the tape under it and stick it back it >> should be still set perfectly. >> >> >> >> That is the strongest way I know to hold it. Also 2 blocks and 2 legacy >> cam clamps for repeat work when doing more than one. >> >> >> >> This may not be the best way but it’s what I would mostly do. >> >> >> >> Bill >> >> >> >> >> >> *From:* legacy-orna...@googlegroups.com <legacy-orna...@googlegroups.com> >> *On Behalf Of *Tim Ziegler >> *Sent:* Monday, 27 June 2022 11:32 AM >> *To:* LOM Group <legacy-orna...@googlegroups.com> >> *Subject:* Re: Anyone try one of these? >> >> >> >> Bill does this work well when your using double stick tape? >> >> I'm not saying its always a fail. Lots of times I put blocks on the table >> for alignment. >> >> There again I have not done near as many as you have done so I'm still >> looking for the best avenue. lol >> >> Kind Regards, >> >> >> >> Timothy J. Ziegler >> >> Ziegler WoodWork & Specialty >> >> 14171 160th Ave. >> >> Foreston MN 56330 >> >> >> >> 320-294-5798 <(320)%20294-5798> shop >> >> 320-630-2243 <(320)%20630-2243> cell >> >> >> >> >> >> On Sun, Jun 26, 2022 at 8:23 PM <bulk...@mmnet.com.au> wrote: >> >> Personally I use a dial indicator or surface gauge to centre work same as >> I did with >> >> Metal machining rotary tables in the old days. Even the line method you >> see in the legacy videos >> >> To centre work I don’t find all that difficult to do >> >> >> >> Bill >> >> >> >> *From:* legacy-orna...@googlegroups.com <legacy-orna...@googlegroups.com> >> *On Behalf Of *Tim Ziegler >> *Sent:* Monday, 27 June 2022 8:16 AM >> *To:* LOM Group <legacy-orna...@googlegroups.com> >> *Subject:* Re: Anyone try one of these? >> >> >> >> Thanks Curt, >> >> >> >> I want to make something like that for the rotary Table. Trying to >> eyeball and get your block dead centered >> >> on the lines is not alway easy. If you recall a few months back I'd >> mentioned mounting a lathe chuck on the >> >> rotary table. this little gadget may have got the wheels turning lol. >> >> Kind Regards, >> >> >> >> Timothy J. Ziegler >> >> Ziegler WoodWork & Specialty >> >> 14171 160th Ave. >> >> Foreston MN 56330 >> >> >> >> 320-294-5798 <(320)%20294-5798> shop >> >> 320-630-2243 <(320)%20630-2243> cell >> >> >> >> >> >> >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> >> Virus-free. www.avg.com >> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> >> >> >> >> On Sun, Jun 26, 2022 at 2:09 PM 'Curt George' via Legacy Ornamental Mills >> <legacy-orna...@googlegroups.com> wrote: >> >> I've been playing around with an idea. something like this could be used >> by us to hold part on the Legacy? for detail work, they are cheap and just >> might work well for some small stuff? >> >> >> >> Just an idea. >> >> >> >> talk more latter. >> >> >> >> C.A.G. >> >> >> >> >> 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