First screw threads cut using Clough42 electronic leadscrew

Metric Threads on an Imperial Lathe

You might well have read my write up on how I implemented the Clough42 Electronic Leadscrew on my Myford Super 7 Large Bore lathe.

While I have been successfully using the ELS as an automatic feed, I had put off attempting screw thread cutting.  You know how it is.   Screw cutting is nagging at you to try, but it is on the ‘too difficult’ pile pending other more interesting jobs.  There is always something else to do, so you kid yourself it is justified to put it off until another day.  Well another ‘lockdown’ day dawned and I decided today was the day.   

My experiences are recorded here as a full write up

Screw cutting using the Clough42 ELS

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Clough42 Electronic Leadscrew Project Implementation Notes

I have been avidly watching Clough42 on YouTube.  James comes over as a really nice guy and his presentation of his projects is excellent.

My principle interest is the Electronic Leadscrew modification to lathes.  When installed this removes all the hassle of gearboxes and look up tables to be able to cut both Imperial and Metric screw threads and to set X axis movement feed rates.

The concept is simple but his implementation is second to none.  A rotary encoder is fitted to the spindle to count revolutions of the chuck and a stepper motor (or servo hybrid) controls the rotation of the leadscrew.  The resulting feed speed is derived from look up tables.  The whole installation is controlled by a Texas Instruments LaunchPad C2000 microcontroller development board.

I have documented how I implemented this on my Myford Super 7 Big Bore lathe and the pdf can be downloaded below.   There is also a ZIP file of all the Fusion related models for either CNC or 3D printing.

Electronic Leadscrew on Myford Super 7

Minor edits added to v3 relating to programming the servo controller

Electronic Leadscrew on Myford Super 7 v3

Electronic Leadscrew Fusion 360 Files

Update : –

Painted control panel for Clough42 Electronic Leadscrew
Finally got the Clough42 Electronic Leadscrew control panel box painted and rather pleased with the result.

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