In Part-1 of the Prusa i3 MKS3S 3D printer kit build, I gave a brief overview of my build experience. In Part-2, I provided more details of putting the printer together. Here in Part-3, I finish up describing the challenges I had during the assembly process.
NOTE: Remember, the below steps are just highlights of my assembly experience. They do not match the assembly steps in the manual.
Step-7 – Installing the X and Y belts. As the build continued, the number of parts to physically work around as you assemble components increases. I found the section on belt installation challenging. The toothed belts are provided flat – not a continuous loop. You have to bend a belt end tightly around a bolt on the belt tensioners, and run them around pulleys.
Impression-7 – This part of the assembly took way longer than it should. It was very difficult to determine how to set the correct tension. This caused me great pain later in the assembly. I would say the belts mechanisms are one of the most important parts of a 3D printer.
Step-8 – Assembling the PSU. You may recall in Step-5, I assembled the PSU mounting bolts on the wrong side of the rail. Now that the printer was 75% assembled, it came to haunt me. When I went to mount the PSU, the screws were on the wrong side.
Impression-8 – The manual was very predictive. “Incorrect placement of the PSU holders will lead to issues later,” is the ground truth. I had to disassemble a lot of parts to correct this issue.