The base table
Like all of our tables, the Three Axis table starts as a welded steel frame. Unlike the Single Axis table, the Three Axis frame has the two inch thick steel plate welded directly to the frame. The frame then gets powder-coated with a textured finish which makes it durable enough for use on the shop floor. After powder coating, we send the frame out to have the top ground flat.
Once we get the frame back, it gets a good cleaning to remove all the grinding dust and fluid. Then we mount the linear bearings and encoders. We use a laser to align the bearings straight and parallel to each other for maximum accuracy. With that base built, we assemble the many parts necessary to build the bridge, calibrate the system with our NIST-traceable laser, and the machine is ready to be delivered.
Fabricated Part Applications
When the parts you make are more intricate or bulky than flat sheets, then the three axis table might be the solution you need. If you’re making fabricated sheet metal components, routed wood parts, or laser or water jet cut parts, the machine allows you to measure:
- Length, width, and depth of a part
- Positions of features like lines, circles, cones, and planes
- Relationships like angles and distances between features
The table’s functionality is provided by the Heidenhain ND 1400 readout. This display takes the inputs from the encoders, interprets touch probe trigger events, and performs the necessary calculations in order to create the geometry from the gathered data. The system uses a touch-sensitive color screen with a user-friendly interface.
The Renishaw MH20i touch trigger probe sends a trigger signal to the display whenever the stylus makes contact with the part. The head of the probe articulates in 15 degree increments about its axis and perpendicular to its axis, providing 168 unique probe orientations from one stylus.
Teaching the Probe
Teaching the display to use the different probe orientations is a simple process. You touch the screen to tell the readout what orientation you have the probe in. You press a teach icon on the screen. After that, you simply measure a sphere position on the table. This reference sphere stays in the same place all the time. From those measurements, the system can see how far the probe tip has moved in the X, Y, and Z axes, and adjust accordingly. This makes it easy to select a probe orientation that will get into the features you need to measure.
Seeing these pictures and reading the descriptions should help you get a sense of how our machines work, but there really is no substitute for seeing it in action. If the video below doesn’t answer your questions, fill out the form below and talk to us. We can arrange to bring our demo machine into your facility to show you in person. You can also send us a sample part, explain what your measuring needs are, and we can shoot a video like this and send it to you.