Then, the suggested order of items on the X axis threaded rod is:
- M8 Nut
- M8 washer
- printed bar clamp (pass through holes)
- M8 washer
- M8 Nut
- printed bar clamp (pass through apex)
- [ large space .... ]
- printed bar clamp (pass through apex)
- M8 nut
- M8 washer
- printed bar clamp (pass through holes),
- M8 washer
- M8 Nut
I started to measure out all of the distances to ensure that the rods all line up. This was tedious and error-prone. Since I didn't have the printed bar clamps that sit on the Y axis threaded rods tightened yet, the X axis threaded rods were free to move along both the X and the Y axis. This made things really difficult. So I decided to take the X axis threaded rod out and add two pairs of M8 nuts to hold the threaded rod in place along the X axis. My order of items on the X axis threaded rod (with my additions in red is:
 |
| M8 nuts and washers I added to make it easier to line up the X axis threaded rod |
Making sure that the Z axis smooth rods are parallel and plumb is especially difficult. I found that it was possible to position my ruler in these two ways to make the necessary measurements. My rules is an Empire 18" Stainless Steel Rule Model 27318.
 |
| For the measurement at the top of the smooth rods |
 |
| For the measurements near the bottom of the smooth rods |
I was about to attach the linear bearings on the Z axis smooth rods to the X ends using zip ties. The left linear bearing lined up well with the left X end, but I discovered that there was a 1/4" gap between the right linear bearing and the right X end. So I had to measure the distance between the Z lead screws at the top and adjust the distance between the X ends to so that the Z lead screws are parallel. It was hard to do this accurately because the X ends do not slide easily along the X axis smooth rods.
This is what my Prusa Mendel looks like after I attached the linear bearings on the X ends using zip ties:
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