Hey Dan, I will have to put my gear configuration on and take some pix for you. It was only a few short months ago I was doing the exact thing you were working toward. I have minimal money involved and had to make a couple adapters to make it work. But it works extremely well and no plastic gears only the adapters. and Linkage extension. Let me know if you're interested and I will post the pix. in the next day or so. I did not reach the 1/16 spacing but was down to an 1/8 or less.
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 5, 2023 at 2:30 PM cdkr...@gmail.com <cdkra...@gmail.com> wrote: > I wish I had listened to "sprocketman" BEFORE going to all the trouble to > make gears to produce a 6 TPI threaded dowel. But then, we wouldn't have > the calculators I fussed over. What drove home the point in my thick skull > was while working on the sprocket calculator I discovered that a simple > pair of sprockets, a 30 tooth and a 20 tooth would produce the desired 6 > TPI. DOH. Larger sprockets of 60 tooth and 40 tooth and several other > combinations would do the trick. > > So, CDO (which is OCD in alphabetical order like it should be) is pushing > me to find a sprocket and hub system that makes changing very easy. It > looks like, after a lot of searching, that LOM owners will have to build > their own hubs. Going further down that path, a pair of special hubs which > hold type A plate sprockets would be desirable, one for the driver and one > for the lathe. Then it dawns on me that 1/8" acrylic is easily cut into > sprocket shapes and is durable because the teeth are relatively large and > the load is widely distributed. And cheap. So, putting it all together, > three special hubs (one to hold the plates for machining the mounting screw > holes and sprocket roots), an idler sprocket, and a length of #25 chain are > all that's needed for a base system. That sets up a scenario where a > desired pitch can be had by cutting one or two sprockets from acrylic. > There are online calculators that draw the sprockets to scale for printing > and subsequent machining. The range of pitches is quite broad, adds a few > to the gear pitch range and is a good alternative to the gears LOM made for > the overlap. In other words, it opens up opportunities for those of us > with limited budgets and can't find the needed gears. > > So that's what I'll be pondering for awhile. Any recommendations on > sprocket hole sizes? > > To keep the plates flat and easy to make, I'm thinking the hub to have a > 3/4" diameter stub for centering the plate and a pair of screw holes to > hold the plate to a flange which would have to be at least 1 1/4" > diameter. If the center hole for mounting the hub can be smaller, then > perhaps a 1/2" diameter stub reducing the flange needed to about 1" > diameter. Either way, the goal would be to make the hubs so they will hold > sprocket plates interchangeably. Universal within the range of the > machine's capacity. > DanK > > > > -- > 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-mills+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/legacy-ornamental-mills/c79fc0d0-ef33-4797-9ad8-8f4a7f2c74b3n%40googlegroups.com > <https://groups.google.com/d/msgid/legacy-ornamental-mills/c79fc0d0-ef33-4797-9ad8-8f4a7f2c74b3n%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-mills+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/legacy-ornamental-mills/CAMBiJLEyredD4A7EMAkxyw%3DN_BRqBHhMUaKZrNSRbfuEZpD_yg%40mail.gmail.com.
