And using these means many "good enough" gears have been made. Having entered the metal working field enough to get my toes wet has made me realize there are precision methods that machinists have used for many decades. In metal working there is much less room for poke and hope.
FYI, Wandel's calculator still needs the module number. He calls it tooth spacing and does it in centimeters instead of the typical millimeters. Close enough to work. Now that we have access to machines that generate the gears, the better the information we can feed them, the better gears we will get. I have been able to confirm the module number for the index gear as 2.08333 and have made a successful pattern that precisely matches the original index gear on the REVO. So now I am about ready to test on paper the gears I think I need for the wooden threads. I'm excited because this pitch calculator allows quick determination of gear requirements for a required workpiece pitch. It still nags me that I haven't found a way to enter a required workpiece pitch and get the gear combos in the results. So in the mean time, this works pretty well. I have also found a way to edit the posted pitch chart so that I don't have to keep deleting and posting new links. So the previous links are broken, the latest link to pitch chart <https://docs.google.com/spreadsheets/d/1VMgn4_ULTWml36mGCgiLYZmlS0gkcZQQuorgZR1XlkM/edit?usp=drive_link> <https://docs.google.com/spreadsheets/d/1VMgn4_ULTWml36mGCgiLYZmlS0gkcZQQuorgZR1XlkM/edit?usp=drive_link> works. Later on, I may bump the link to a new post where it may be easier to find. Any suggestions regarding that? DanK On Wednesday, September 13, 2023 at 6:46:49 AM UTC-4 Tim Ziegler wrote: > Thats all I've done too Waddles program. > > Kind Regards, > > Timothy J. Ziegler > Ziegler WoodWork & Specialty > Ziegler Laser Worx LLC > 14171 160th Ave. > Foreston MN 56330 > > 320-294-5798 <(320)%20294-5798> shop > 320-630-2243 <(320)%20630-2243> cell > > On Tue, Sep 12, 2023 at 11:43 PM 'Curt George' via Legacy Ornamental Mills > <legacy-orna...@googlegroups.com> wrote: > >> Hello Everyone! >> >> This is beyond me TOO. >> How I did it, was to find a gear generator program, then match the >> Legacy's gears to find the tooth pitch and angles so everything matched up >> right. >> Then I used common math to find make the gear reduction ratio's that >> would work for me. >> Here is a pix. of my chart. >> >> C.A.G. >> >> On Tuesday, September 12, 2023 at 11:25:31 PM EDT, <bulk...@mmnet.com.au> >> wrote: >> >> >> I scroll sawed all my custom gears it took a really long time too I >> generated the gear in a on line program all I needed was the distance >> between the teeth and the tooth count and it produced a pic of the gear >> which I glued to the metal plate then scroll sawed away. >> >> >> >> Bill >> >> >> >> *From:* legacy-orna...@googlegroups.com <legacy-orna...@googlegroups.com> >> *On Behalf Of *cdkr...@gmail.com >> *Sent:* Wednesday, September 13, 2023 8:17 AM >> *To:* Legacy Ornamental Mills <legacy-orna...@googlegroups.com> >> *Subject:* Re: Gear calculations >> >> >> >> No worries, mate. Bill can do math upside down and backwards. I've just >> posted more updates. >> >> >> >> My goal doing all this is to be able to easily extend the capabilities of >> my REVO LOM. Specifically, the current shop project is restoring a wooden >> hand plane that needs wooden threads typical of the era 3/4 - 6 (dia - >> pitch). I have a thread box, but it doesn't do well in the wood I have, so >> the REVO is called to duty. But the pitch required on the wooden dowel is >> not reachable with the standard gear set for the REVO even if I had all the >> gears made that would fit it. So the simplest route turned complex-- make >> custom gears. But I don't think I know anyone yet that can generate an >> accurate DXF file without knowing the module of the gears. A DXF file >> communicates the gear specifications from a drawing to a G-code generator >> that operates a CNC device of some sort, be it laser, water jet, machining, >> or 3D printer. Any two gears that mesh must have the same module. There >> are two modules used on the most common LOMs, one for driver gear (the >> little teeth) and one for the index gear (larger teeth). >> >> >> >> So a milestone has been reached. Now I will be looking for ways to >> actually make the gear I need. I have 1/8" acrylic sheets that I can >> scroll saw to shape. I also have machining tools capable of gear cutting, >> i.e. mill and index head. I'll poke around some before I get serious about >> hiring someone to make the gears, but I won't turn down leads. >> >> DanK >> >> On Tuesday, September 12, 2023 at 5:41:45 PM UTC-4 M.W.Foscue wrote: >> >> I think we may have a "Rocket Scientist" amongst us! LoL!! >> >> >> >> Dan - I'm impressed with the level of detail/calculations and questions >> you come up with. >> >> >> >> Please explain - once you know the module - how do you employ/use it? >> >> >> >> Glad you asked the question - but, as you can tell, I have no clue as to >> what you are addressing here. >> >> However I have interest in what you are asking and how you will use the >> answer(s) - as well as how the rest of us will, as well, in our own unique >> situations. >> >> >> >> Question: Does Bill B. (Aussie man) have to use this equation: >> >> ____*1______* >> >> m = OD/(z+2) >> >> >> >> 😜 >> >> Mac >> ------------------------------ >> ------------------------------ >> >> >> >> -----Original Message----- >> From: <legacy-orna...@googlegroups.com> >> Sent: Sep 12, 2023 1:55 PM >> To: Legacy Ornamental Mills <legacy-orna...@googlegroups.com> >> Subject: Gear calculations >> >> >> >> Hi guys, >> >> Can anyone confirm my calculations of module for the drive gears and >> index gears? >> >> >> >> I calculate: >> >> drive gear module = 1.05435 >> >> index gear module = 0.09722 >> >> >> >> These two numbers are in mm and are critical to the accurate production >> of gears to work on the LOMs, specifically the REVO. >> >> >> >> The formula I used is m = OD/(z+2) where m is module, OD is outside >> diamter, and z is the number of teeth. >> >> >> >> Thank you. >> >> 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/2443c385-c130-4fc0-aa44-c91b8974800fn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/legacy-ornamental-mills/2443c385-c130-4fc0-aa44-c91b8974800fn%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/e3d5d39d-3742-40df-8a35-1c3e052fd1a8n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/legacy-ornamental-mills/e3d5d39d-3742-40df-8a35-1c3e052fd1a8n%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/001101d9e5f1%24ed6b46d0%24c841d470%24%40mmnet.com.au >> >> <https://groups.google.com/d/msgid/legacy-ornamental-mills/001101d9e5f1%24ed6b46d0%24c841d470%24%40mmnet.com.au?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/1283418122.113060.1694580214447%40mail.yahoo.com >> >> <https://groups.google.com/d/msgid/legacy-ornamental-mills/1283418122.113060.1694580214447%40mail.yahoo.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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