This is the final in a series of posts describing my adventures with 3D
printing, and specifically, with a Prusa I3 RepRap Kit. The first of
the series is
here.
There were some goods, bads, and uglies associated with this kit (as a review by Greg discusses on the 3D Printer Czar website).
First, the ugly, NO INSTRUCTIONS! I know that this is being worked on but kits should not be shipped without instructions unless there is a clear understanding by the buyer that this is the case. Even then there would be some things that would have helped mitigate frustration. First, provide some high quality photos of an assembled printer taken from multiple angles! Second, provide some links to the most relevant variants of this particular printer where instructions do exist!
Next, the bad. As Greg stated in his review there were some missing parts in my kit and the wrench that was provided was one size too small to actually fit anything! In my case at least some of the missing parts might be due to a customs inspection as the printed parts bag was open and parts had spilled from it.
Finally, the good. This kit really does provide excellent quality parts for what I think is the best variant of all the Prusa printers and at a very reasonable price. I could not find a better price for the Prusa I3 with Ramps (though I did find a comparable price with a Sanguinololu board. I had also priced out the sourcing of parts outside of a complete kit and the end price would have been pretty close to the cost of this kit. I would also say that the support of my build from Han in Hong Kong was pretty good considering that he is probably pretty stressed out by having to answer questions that documentation would circumvent!
The bottom line...if documentation is available for this kit buying one is a no brainer. Good quality parts, a great variant of the Prusa I3, and literally everything you need in one nicely packed box (save a region specific power cord). The kit even comes with the glass for the heated bed which many kits do not.
The above is what I wrote as a product review on the 3D Printer Czar's website. Here are some more observations from my build:
- The smooth rods for the z
axis are 1cm too long. I had to drill a
hole in the upper supports for the rod to protrude...otherwise it would
have blocked the servo by the same amount.
- Unless
I am completely off my rocker some of the areas where you think that a
10mm bolt should work...there is not enough room (as in the bolt does
not protrude from the other side). I have been forced to use the longer
16s and of course ran out of them and used some of the 25s which of
course I then ran out of them. I am getting some more bolts but I
think it is another thing for you to look at.
- The
tie-ties provided don't fit any of the holes where
they are intended to go. I had smaller tie-ties that I was able to
use but even these did not fit on the x-axis carriage. I used bare
wire here and wrapped it tightly to secure it. I guess, in all these
cases, I could have expanded the slots but I found the alternative
tie-ties and wire easier.
- I was missing the parts that connect the z-axis servos to the threaded rod that drives motion on that axis. I was able to do a work around using shrink wrap tubing and some cable ties that worked (and continues to work).
- The kit comes with the fan for the extruder but not the printed part that would allow you to mount the fan! Not a problem as I printed one but a good note for the instructions...or just include that part!
- Pointing the buyer to a version of a firmware configuration file that matches this printer would be a nice idea!
Finally, even when the documentation is done, I would STRONGLY recommend that the Czar add a forum feature to their website. All support requests should be channeled through that medium. That way the questions that I ask may not need to be answered again as another user might see the answer. In addition, while active in the build process, users might actually help themselves! There are plenty of free alternatives out there that could meet this need.
The most extreme of the overhangs was the most challenging, and in fact, is still not perfect. Interestingly the only way I was able to get it as far as it is gotten was to print it sideways and have another object printing above it so the fan plays on it more than if it were printed alone. 
Here are the parts, somewhat organized, with the parts list from the kit. I did not do a complete item, by item, inventory but wish that I had for a number of reasons. First because I was missing a couple parts and second as it might have helped me avoid at least on mistake!
Here is the y-axis with the longer rod replaced and with the y-axis servo in place. The timing belt has also been installed anchored on the bottom of the car that will drive the hot bed and looping through the y-axis idler at one end and the servo motor at the other end.
