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-mills+unsubscr...@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.
