Testing linear movement effect of rotating screw.

There is a tool called compound cross table or XY table that helps precision material cutting or milling. It’s advanced version of bench vise.

Small one, size of palm, usually costs over one hundred dollars in U.S. The country where I live it is well over three hundred dollars. And what matter worse that sellers don’t sell entry level products so DIYer like me either spending chunk of money or force to buy oversee or to build.

I got fed up by the surrounding situation and seriously thought of building a compound cross table by myself. Internet search wouldn’t give me clear explanation how it works. I had an idea of the linear movement mechanism by rotation of fixed lead screw yesterday while reading through MIDGET Metal-Turning LATHE by A.D. Mays, Popular Mechanics.

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I made an experimental device to test the idea and it worked out great. The miniature wooden table is sitting on the fixed lead screw by two M6 nuts. Turning the lead one direction make it moves forward. I forgot it was clockwise or anti-clockwise. To keep it balance on its motion, I drilled three holes below the lead screw and inserted electric wire.

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Now I understand how the compound cross table works. Next version will have X and Y axis movement, the lead screws will be fixed in the frame so that they will rotate freely.

About janpenguin

Email: janpenguin [at] riseup [dot] net Every content on the blog is made by Free and Open Source Software in GNU/Linux.
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