... or how to spend few months extruding molten plastic

Why ?

After finishing my first 3D printer, I started to feel hunger for more upgrades, changes and playing with 3Dprinting in general. The second build was commenced !

2nd build

Of course, it was based on well known RepRap Prusa-Mendel i2 again.

Plastic parts for a second 3D printer were printed on my first machine.
Nearly all parts were made out of yellow ABS filament.
This time, I wanted to have a chance to create larger models, so I had to buy longer threaded and smooth rods. Since longer rods means more flexible construction (which is not desired effect), I had to print some frame add-ons to make it more rigid.

I've also added quite a few enhancements like more precise Z-Endstop holder, electronics box, cable chain cover or details like dust collector.
Yeah yeah, I know it is nothing new but that was 3 years ago ;)

Beside all above minor changes, there was a big one.
I've changed an extruder to Yruds and UDS4.5 Hot-end by Unique Design equipped with a 0.4mm brass nozzle. That combo definitely improved speed and precision. I've also powered whole machine via Ever Sineline UPS after few failed prints - power surges are not good :>

Here is how it looked just after first tests.

Naaah, that one ;)

Here is a video of it printing just after preliminary calibration but still with an old hot-end

Printer 2.0 from pit on Vimeo.

For a comparison, you can have a look at a video below.
Fully calibrated (which took around a year lol) with all upgrades mounted and with new UDS4.5 hotend.

StillPrinting from pit on Vimeo.


I must admit that to get decent printouts I had to spend few weeks ... OK, OK .... waaaay more, but it's fun and it's a part of learning curve.
I won't go into details of how to calibrate a RepRap since on the web you can find a lot of publications by people with far superior knowledge to mine.

I've printed a shit load of useless stuff but there were goodies too.
A good example is the one below.
Thanks to Jakub Husak (for providing models) I was able to print replacement parts for FDD CA2001 for 8-bit Atari which fail quite often. These parts were given to participants of the Garage Party that I occasionally organise.

Here are a photos of failing original parts

(original photo by [dereatari](http://www.dereatari.republika.pl/serw.htm#Stacje dysków Indus GT, LDW2000, CA2001))

(original photo by blog.3b2.sk)

and here are replacements being printed.

Not quite there ... yet

Despite countless hours spent on calibration, tweaking and printing I still wanted more - well, my son wasn't born yet so I had plenty of time :D
On the last video below you can see parts for my third 3D Printer being extruded. Stay tuned for PART 3 !

3d printer - lost video of my second build from pit on Vimeo.