that seems like the best solution Dan. 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 Fri, Oct 6, 2023 at 6:05 AM cdkr...@gmail.com <cdkra...@gmail.com> wrote: > Or just download this and overwrite the original. > DanK > > On Friday, October 6, 2023 at 6:33:02 AM UTC-4 cdkr...@gmail.com wrote: > >> Bill, Cells B4, C4, and I2 should be green and editable on the Sprocket >> ratio sheet. >> I found that I failed to unprotect I2. To make it editable go to >> "Tools>Unprotect sheet" >> and toggle it off. If you want to re-protect the sheet while leaving I2 >> editable, then >> make I2 the current cell and uncheck the box at >> "Format>Cells>Cell protection>Protect cell". Then you can go >> back to "Tools>Protect sheet" and toggle protection back on. Optional >> safety feature. >> >> Sorry to make you work for it! Any other issues, let me know please. >> I'm using >> Libre Office Calc, so if you opened it with Excel or some other >> spreadsheet program >> the commands may be different. Thanks for the heads up. >> DanK >> >> On Thursday, October 5, 2023 at 10:29:40 PM UTC-4 bulk...@mmnet.com.au >> wrote: >> >>> I did find it Dan but there is no editing option that works to put in >>> say 6 tpi to find out what sprockets to make >>> >>> That’s why I asked the question >>> >>> >>> >>> Bill >>> >>> >>> >>> *From:* legacy-orna...@googlegroups.com <legacy-orna...@googlegroups.com> >>> *On Behalf Of *cdkr...@gmail.com >>> *Sent:* Friday, October 6, 2023 12:35 PM >>> *To:* Legacy Ornamental Mills <legacy-orna...@googlegroups.com> >>> *Subject:* Re: Sprocket development >>> >>> >>> >>> Hey Bill, >>> >>> Dan how about making a sprocket spread sheet that cover lots of tpi and >>> pitches I for one would be interested in that >>> >>> You can start with mine and add to it the different threads like your 6 >>> tpi this would be good for using plastic >>> >>> Instead of metal. >>> >>> >>> >>> Bill >>> >>> I think I have already done what you are suggesting. The last tab of >>> workbook >>> >>> I've posted has the title "sprocket ratios" and what you are suggesting >>> is what >>> >>> that's all about. I thought you saw those tabs. >>> >>> I'm gonna try cutting the acrylic sprockets when the time comes to prove >>> to >>> >>> myself one way or another that acrylic sprockets will be durable. >>> Gears, >>> >>> definitely not. But sprockets are a whole different beast. I have the >>> material >>> >>> and no other, so that's where I'll start. I'm open to learning. >>> >>> DanK >>> >>> On Thursday, October 5, 2023 at 9:07:14 PM UTC-4 bulk...@mmnet.com.au >>> wrote: >>> >>> Delrin would be my first choice to me plexiglass is for windows not >>> gears that’s just my thoughts >>> >>> >>> >>> Bill >>> >>> >>> >>> *From:* legacy-orna...@googlegroups.com <legacy-orna...@googlegroups.com> >>> *On Behalf Of *Okla Mike (Liltwisted) >>> *Sent:* Friday, October 6, 2023 11:13 AM >>> *To:* legacy-orna...@googlegroups.com >>> *Subject:* Re: Sprocket development >>> >>> >>> >>> My only caution for you is that there will be an easy grip of a chain >>> but all that torque will be transferred to the shaft. You will really have >>> to beef that area up if you will be doing "work". If you are doing just >>> low pressure or timing, that shaft will not be so vulnerable. I suggest >>> using something besides plexiglass. >>> >>> Mike OK >>> >>> On 10/5/2023 5:12 PM, cdkr...@gmail.com wrote: >>> >>> Yep, found that out the hard way. Was half expecting it, though. But >>> acrylic >>> >>> should be fine for sprockets because the pressure is spread over almost >>> >>> half of the sprocket instead of focused on a tiny contact point of >>> gearing. >>> >>> Is that a reasonable expectation? >>> >>> DanK >>> >>> On Thursday, October 5, 2023 at 4:21:06 PM UTC-4 Curt George wrote: >>> >>> Hey Dan. >>> >>> >>> >>> Acrylic and Plexiglas are to brittle to work for gears, (at least for >>> the long term.) But I have had luck with Acetal and Delrin/POM H. work very >>> well for the gears that I've made. These plastics work/cut well on the >>> Laser as well. >>> >>> >>> >>> NOTE: I have Acetal/plastic gears meshing up with steel gears for a long >>> time, Only slight ware, even though the steel is much harder then the >>> plastic. >>> >>> >>> >>> NOTE: increasing the speed of the gears is hard ON the gearing, but if >>> you want to slow the gearing down, going small works easy. EXP. my x2,3,4 >>> gear set. Using the 96 tooth gear form the Legacy and 24,32,48 gears also >>> standard gears. (can be found in our archives... >>> >>> >>> https://groups.google.com/g/legacy-ornamental-mills/c/YrTllthCU-o/m/eZ7juNXZBAAJ >>> >>> >>> >>> >>> C.A.G. >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> On Thursday, October 5, 2023 at 03:30:31 PM EDT, cdkr...@gmail.com < >>> cdkr...@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...@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...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/legacy-ornamental-mills/65729de3-333a-4772-9d73-cf2c17e35076n%40googlegroups.com >>> <https://groups.google.com/d/msgid/legacy-ornamental-mills/65729de3-333a-4772-9d73-cf2c17e35076n%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/897d3dcc-2856-a852-85ca-f5da243b02ff%40iglide.net >>> <https://groups.google.com/d/msgid/legacy-ornamental-mills/897d3dcc-2856-a852-85ca-f5da243b02ff%40iglide.net?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/8283c73b-7185-4483-af8e-8f69aa03e1b8n%40googlegroups.com >>> <https://groups.google.com/d/msgid/legacy-ornamental-mills/8283c73b-7185-4483-af8e-8f69aa03e1b8n%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/9378cb6e-92b5-44bd-96a7-a60a37d998f3n%40googlegroups.com > <https://groups.google.com/d/msgid/legacy-ornamental-mills/9378cb6e-92b5-44bd-96a7-a60a37d998f3n%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/CAMBiJLG_pcdTUGGjgrx%3D9WpZiw_ytwGgCrS_K%2BzVi3ORzZ6sbg%40mail.gmail.com.
