nema 17 and nozzle, I started by specifying exactly what measurements I needed to make: what was the relationship between them. The nozzle in this position gave me a rough outline of the cold end, so it didn’t hit anything.
The other features of the cold end and their location are unnecessary. You don’t need to model the entire component — you just need to model the parts that affect the component being built. It looks like we have a nema 17 bracket at the back.
Since all stepper motors are built according to the standard, we can apply Rule 1 immediately. Fast search shows that nema 17 mode has 3 mm square hole spacing at 31mm and 27 mm holes in the middle.
Next is the application of Rule 2. It looks like the axis is right in the middle of the box, which means that nema 17 mode should be right in the middle of the box. Looking at it again, however, it is clear that the center is an illusion caused by the offset screw in the lower right corner. This is an important dimension, so I want to measure it to make sure it is in the middle.
First of all, I chose the angle that was the easiest to measure. According to Rule 1, I can assume that without rotation, the step mode and everything are completely square. Even though there are some unknown advantages of rotating stepping holes, CAD software hates this kind of thing very much.
Finally, we must get the offset from nema 17 axis to the center of the nozzle assembly.