![]() ![]() They rely on the workpiece to be electrically conductive so a circuit is closed when the edgefinder touches the workpiece. Electrical edge finders light up and/or beep when they come into contact with the workpiece. ![]() So, part zero sits in space rather than actually being on the part.Įdge Finders come in many varieties, but we’ll group them into mechanical and electrical categories. Since you’ll be starting (usually) with unmachined material, it’ll be important to leave some allowance for machining in your CAD drawing. You’re typically going to make the corner part zero. To use this method, put your part in the milling vise or fixture. Here are a number of methods to choose from: Method 1: Use an Edge FinderĮdge Finders are by far the most common way to find part zero, so we’ll start there. Understanding the whole arsenal of methods will help you to become more efficient by selecting the best one for each job. The amount of effort involved is not the same for each one, and some are better for special cases while others are more general. Incidentally, locating Part Zero is often called “Touching Off.”įor more, check out our g-code programming chapter on Part Zero.Įvery CNC machinist needs to be able to do this simple step, and often having more than one way to do it is helpful. It’s also called “Program Zero” since X0Y0Z0 in the g-code program is the location of Part Zero. Part Zero is the datum corresponding to the 0, 0 coordinate on the CAD drawing that you used for all your CAM work or to generate the g-code for your part program. One of the first things you have to do before you can begin machining a part is to tell the machine where part zero is. ![]() I’ve updated it with several new methods. This article was originally published in 2016 with only 8 ways to locate Part Zero and has been hugely popular ever since. 11 Ways to Locate Part Zero on Your CNC Machine ![]()
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May 2023
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