Welcome to Rex Swensen's Web Site

This site is devoted to clockmaking, and the use of CNC machining to make clock parts. A link is provided to a wide range of information including programs for stand alone stepper driven indexing and crossing out, and a data base of clock designs, clock plans and clock books for clock builders and the home workshop machinist.

bullet Eight day 1790 longcase clock (Updated Sept 2012)
bullet Vienna regulator circa 1820 Laterndluhr (Updated May 2009)
bullet Dynamyte 2400 CNC milling machine (Updated Jan 2014)
bullet Programming for CNC
bullet Programming with circular arc interpolation
bullet Crossing out on the CNC Mill
bullet Tooth cutting on the CNC Mill
bullet Optical Centre Finder
bullet Standalone Indexing and Wheel Cutting (Updated Apr 2014)
bullet Standalone Crossing Out with Stepper Motors (Updated Apr 2014)
bullet

List of clock making links

DOWNLOADS:  Click Here to Link to My Google Drive To access my documents and programs - all FREE (use List View)

Replica of a 1790 longcase clock movement
My first clock. A replica of a 1790 longcase movement.

If you've come to this site then you have an interest in mechanical clocks, either the repair of, or the making of. My interest is not in repair, but in the making. My challenge, as an amateur constructor, is to make every component of the clock myself, from the wheels (gears) right down to the winding key. In my first clock, I made all the gear cutters, and indeed had to firstly make specific tooling in order to make the gear cutters!

I have also been very interested in computers and their application in design (CAD), and in CNC machining (computer Numerical Control). I was fortunate in acquiring a bench top 3 axis CNC milling machine which is ideal for making clock parts. I write my own software for this machine. But more of that on other pages. I have also built a rotary table and a fourth axis drive for wheel cutting.

A word or two about myself. I am a retired mechanical engineer, having worked as a design engineer with a large automotive company, and as an applications consultant with a large computer company. This brought me into close contact with CAD and CNC.

I classify myself as a model engineer, and it is only in recent years since retirement, that I have become embroiled in clock making. Until then I had made a number of internal combustion engines, model boats, tools and other items of workshop equipment including the rotary table for my Dore-Westbury milling machine.

My first clock, an eight day longcase clock, is examined in more detail in following pages. The movement (shown above) was constructed over a 2 1/2 year period, including lots of tooling, and the dial and case a further year. I am now making a pair of Vienna regulators of similar, but not identical design. I have prepared my own designs for these, since, at heart, I am still a design engineer. All drawings have been prepared on CAD.

While in earlier years, model engines were my main focus, today it is clock making. Why make a clock you ask? Well, a clock has all the exacting engineering attributes of a model engine, but rather than sit in a drawer when finished,  they serve a useful and decorative addition to the family home, and indeed will probably become family heirlooms. Perhaps they will still be around in a hundred years time. A chance at immortality?

This site will be updated from time to time. Re-visit soon for updates.

email me with your comments. 

Last updated: Jan, 2014