Studio of Bill Ooms

Bill Ooms

PenChuck Software -- no longer supported

This software is available to wood-turners free of charge! The purpose is to help visualize the cut patterns on a rose engine ornamental lathe.

You set the rosette parameters on the right side of the screen. You can select from a variety of common rosette shapes. The amplitude (i.e. maximum deflection from min to max) is adjustable. You can also set the phase of the rosette. Note that this software uses the engineering sense of phase. That is, 90 degrees of phase shift represents 1/4 of the repeat pattern. The absolute spindle offset is phase/repeat.

The left side of the screen simulates a pen chuck on a rose engine. You can move the position of the pen toward the front of center (positive number), or toward the back of center (negative number). You can also set the width and color of the line.

Important Note:

This software is no longer supported. Apple, Oracle, and Microsoft make changes faster than I can keep up with them.

The source code for this software is available to anyone who wishes to make their own changes or modify it for their own purposes. You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 3 of the License. It was developed using the NetBeans interactive development environment which is available for free. To download the source code, see: (and be sure to read the README file).

Computer Requirements:

The software was written in Java, so it will run on most computers. It was developed on a Mac and was tested on Intel based computers. I’ve also tested it on Windows XP, Windows 7 (64 bit), and Ubuntu Linux.

You need to have the Java run-time software loaded on your computer. It has been working fine with Java6 and Java7. It also appears to be working with Java8 (but has not been thoroughly tested on Java8).

Downloading and Running:

Mac Users: Mac users can click Download Disk Image on the left. This gives you a disk image that you can open, and drag the PenChuck application to your desktop or other location.

Windows and Linux Users: After installing Java, Windows users can click Download Zip File on the left. This gives you a .zip file that you can extract. For windows, run the penchuck-windows.exe installer. For Linux, run the installer.

And finally:

If you would like to make a contribution to support my newer software development, click on the "Donate" button on the left (payment via PayPal). Thank You!

Email me at:

This software is part of the Computerized Ornamental Lathe (COrnLathe™) project.

This software is Copyright © 2011 by the Studio of Bill Ooms.