Continuing the fabrication and assembly of the printer I next tackled mounted the pulleys and belts. The belt system uses three different sizes of pulleys. I realized that the X/Y mounting brackets were slightly off in the CAD model due to an error in modeling some of the pulleys. I adjusted the pulleys and brackets in the model:
I then 3D printed the updated pulley blocks to test fit. The corner brackets were the easiest, since they just involved mounting the pulleys on a single shaft. I also 3D printed spacers to go between the pulleys:
The Y carriage blocks were tricker, since the two pulleys overlap. I had to reprint the block after doing an initial test fit to increase clearance around the pulleys. I also had to print the spacers a few times to position the pulleys vertically just enough to clear each other properly.
After working those out, I was able to finish assembling everything together. However I still need to work on the tensioning mechanism for the belts. It's difficult to get the belt tensions correct.
I also went ahead and cut the holes and ways in the Z axis plate:
Next I will begin assembling the Z axis assembly and drilling the holes in the edges of the plates to mount them together.