Tuesday, November 25, 2014

Prusa i3 Rework: Build Log #3- Y-Axis Assembly

The Y axis on most 3D printers is the axis that moves the bed back and forth, while the X axis moves the gantry across the printer and the Z axis lifts up the X axis assembly. This post describes my assembly of the Y-axis on my Prusa i3 Rework.

The first issue that I ran into was that the holes for mounting the Y Belt Holder onto the build plate were a bit messy. That was easily remedied by drilling out the holes with a power drill.

Laid out here are most of the necessary parts for the carriage- the build plate, three linear bearings, two small screws, two nuts, two washers, and the Y Belt Holder 3D printed part. Missing are the zip ties needed to secure the linear bearings to the build plate.

Shown above is the build plate, nearly finished. The only thing left to do is to cut off the ends of the zip ties attached to the linear bearings.

This picture shows some of the printed parts for the Y-axis base: in the rear, there are the four Y Corners, and in the front there is the Y Idler, with a screw in it.

Pictured here is a Y Corner part- it has been drilled out in the large holes with a ten millimeter drill bit, in order to allow the ten millimeter threaded rod to slide through easily.

Pictured here is the Y Idler part, with all of the proper hardware installed. The bearing apparatus had to be tightened properly (not too tight!) so that the bearing would spin freely.

Here are the Y Idler and Y Motor printed parts attached to some of the threaded rods.

Now the full front and back parts of the frame have been assembled. These pieces connect together with long rods to form the entire base of the printer.

Here the threaded connecting rods are being put together. The nuts and washers in the middle connect to the aluminum frame of the printer.

Just a closeup of the nut on the threaded rod- Replikeo (the company that I bought the kit from) did a great job with selecting good quality threaded rod for this part. It was very clean and even had polished and smoothed ends.

Here the base is starting to be assembled- the long threaded rods connect the front and the back parts of the printer.

Now the long smooth rods on which the carriage rides are attached above the long threaded rods.

All zip tied together, which means that the Y-axis assembly is now finished.

This is what the base looked like when it was finally completed. It took a while to get it to have all four corners lay flat on the table- lots of adjustment occurred while I toyed with the nuts to get them to make the base level. If you build a Prusa i3 Rework, prepare yourself for this!

This post is the third of ten that goes over my Prusa i3 Rework build. These posts are in the order given on RepRap's wiki page for the Prusa i3 ReworkAll of the images from the build are in this Flickr photo album.

My build log: