If the tip of the extrusion PrintJet is centered right on the circumference of a 20mm circle then you need to account for the. This is just about what I expected based on previous experience. I used the inner measurement blades of the digital caliper to measure the inside edge of the circle. Inner Edge: Designed 20mm Diameter - Printed 17.71mm Again, we just have to remember that not one of our measurements so far is printing exactly as designed. That's not perfect but, it's not all that bad either. The last of the extruded rectangles was designed at 2.5mm. Otherwise, the minimum with would have been 1mm.83mm, it would appear, is the minimum width for an object. And, in this case the perimeter lines actually must have overlapped. The printer tries to create a perimeter for the object. One of the things you notice when print this test is that ALL of the cubes were printed in two passes, no matter how narrowly they were designed. This provides some context and comparison that is helpful in trying to understand how to design for 3D printers. Once the file was created, I printed it on both the Cube 3D printer and the RapMan 3.2 3D printer. So, beginning low and going up makes some sense to make sure we cross that sweet spot. We're asking the question, 'At what point does the printer start to best match the designed width of the object. But, what we are looking for is the BEHAVIOR of the printer from very narrow to wider. 25mm wide objects is pointless since the PrintJet head, itself, is. This video demonstrates how the test file was created using Moment of Inspiration ( Most people with experience with 3D printing would say that beginning with. We're going to try to identify those differences with a test file. But, it also means that there may be some difference between the object as we design it and as it printed. Pushing down creates a strong bond between layers. Push down on the top of the molten plastic and you should get a strand that becomes WIDER than. This means that the plastic is flattened by the PrintJet tip. 25mm on each side of the center of the PrintJet. This means that plastic should extrude at a minimum of. I believe that the PrintJet opening in the cube is. We can then print these objects and measure them to see how they compare to our original drawings. We do this by creating specially designed objects of known size and shape.

While I have no idea what algorithms are used in determining the center of the tip during printing, we can create test objects that give us some idea as to how the print engine interprets our designs. The width of a strand is dependent on the width of the opening in the extrusion Hot End tip and the speed of both the extrusion and the travel of the hot end tip. These strands are combined to build the 3D object. All extrusion 3D printers lay down a strand of molten plastic.

Moi3d outer dimension