My Lathe

After thinking about it for quite a while I finally took the plunge and bought a lathe, I've always liked making things, usually it's with a soldering iron and some electronic components but now I'd like to try my hand at turning metal.
Anyway here are some of my experiences and discoveries, I hope someone finds them useful.

Thursday, 15 January 2015

Threading Gears - Calculator

Whilst trawling around the net I came across a really useful utility on a Blog written by lathnovice.
Where this utility varied from the others I found was that it came at the problem from the other direction, instead of entering your gear configuration and seeing what the TPI or pitch was you could enter your gears and the pitch or TPI and it then calculated the gears you needed, the position they should go in and even the error in the pitch if you were trying to cut imperial threads on a metric leadscrew.

I purchased one of the 63 tooth gears from arceurotrade hoping to cut imperial threads on my metric lathe and this utility proves that it can be done and the error in dimensions is less than with the standard gears.
Link

And, as usual, I thought to myself "that would really be useful as an app on my phone"

So after looking at the source code and scratching my head for a while I thought the easiest way would be to use Appinventor and create an app that just displays the code in a Web viewer so you can use it off-line.
I reduced the number of gears available and moved some of the info around so it would better fit on a phone screen.
I've checked with the creator and he's happy with this so here are some links.
The source on Appinventor Community Gallery here
The APK file here

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12 comments:

  1. Anonymous16 January 2016 at 16:27

    Hiya, I've had a link to your android version of this for a while on my links page but it was a bit obscure and buried so I've put a link on my main "links" menu now, too... Cheers!

    - Carl (Lathenovice)

    ReplyDelete
  2. Anonymous18 February 2017 at 13:06

    Hi I Have 4 TPI lead screw so what I Have To do for this type of lathe ratio?

    ReplyDelete
  3. webhead26 October 2017 at 22:54

    Dropbox link to the apk is out...

    ReplyDelete
    Replies
    1. Gadjet27 October 2017 at 01:08

      Try this link: -
      https://www.dropbox.com/s/79burmnv1ybx5wy/Gears.apk?dl=0

      If it works I'll update the original post.

      Delete
    2. Gadjet1 November 2017 at 23:32

      Did it work for you?

      Delete
  4. Gadjet27 October 2017 at 01:05

    This comment has been removed by the author.

    ReplyDelete
  5. BlogStef11 January 2018 at 14:34

    I've downloaded it (dropbox)but I have a "parse error" when I tray to install it
    Any Idea. look like a very good app

    ReplyDelete
  6. Unknown6 July 2018 at 05:14

    Doing great I want to make a simple home-made lathe this information will be of great help

    ReplyDelete
  7. Laxmikant Desai30 September 2019 at 06:19

    My machine is 4.5' lathe 4TPI lead screw and I want 12 mm pitch thread to be cut please send me the gear train

    ReplyDelete
    Replies
    1. Gadjet30 September 2019 at 08:41

      https://www.dropbox.com/s/6fvruc0rwma5spk/Image%201.jpg?dl=0

      Delete
  8. Gadjet30 September 2019 at 08:56

    If you have a TPI value that is not in the APK version then visit the link underneath the first image to run it in your web browser, there are more options.

    ReplyDelete
  9. Unknown21 December 2020 at 05:32

    60p mm

    ReplyDelete

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