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Trainset

Generate all thread pitches your lathe is capable of using some inputs, with the set of gear trains needed on the banjo!

Building

cargo build --release --features yaml

Running:

Trainset has two modes:

  • generate
  • lookup

Generate will generate a database file, and a plain text file of all the pitches the lathe can produce along with the gears needed to produce that pitch.

Lookup will allow a thread pitch to be entered (after the database is generated), and trainset will search the database for the desired threadpitch showing all values within 2 decimal places of the target. (on the TODO list)

Running a generate:

./trainset generate CQ6125.lib.txt CQ6125.gb.txt 40 60 2 CQ6125.out.txt

These settings are for my lathe, a Chinese "CQ6125". The Grizzly G0602 will be similar, though the library and leadscrew pitch will have different values. The gearbox will be the same however.

  • CQ6125.lib.txt is a library file containing all the gears
  • CQ6125.gb.txt is a list of the gearbox ratios (or gears if known inside the gearbox).
  • 40 is a gear attached to the spindle
  • 60 is a gear driven by the spindle. Typically this will have the "A" gear on the same shaft.
  • 2 is the pitch (in mm) of the leadscrew
  • CQ6125.out.txt is the output text file.

Running a lookup

... on the TODO list. But it'll be something like this:

./trainset lookup CQ6125.db 2.5

to get a listing of all combinations close to 2.50mm pitch.

TODO list items

Some of the TODO stuffs:

  • lookups
  • write a binary file for storing gear combos with fast lookups
  • write the text file to an output rather than to STDOUT (screen)
  • merge the different configuration files (.lib.txt, .gb.txt, and the three magic numbers into a single configuration file)
  • less .clone()s in the code
  • optimise CPU
  • too many .unwrap()s in the code... can I fix this?
  • sqlite is kinda sluggish (about 10x slower) compared to just writing out a text file

Thanks

Many thanks to Mitchell Hunter [mitchicus] for putting up with my troubleshooting of Rust.