Rav's Lab

I put some video on youtube showing my new hotend printing parts for another prusa :) http://youtu.be/e0U8G4x3B9E

Small upgrade for my Prusa Air 2 reprap :).. I got this pcb with rotary switch and LCD from ReprapDiscount, they sell really nice looking and quality Ramps kits for quite cheap. Apparently they sell quite a lot of these LCD boards.  To get the LCD board to work you need to uncomment kollowing line in your Configuration.h file // The RepRapDiscount Smart Controller // http://reprap.org/wiki/RepRapDiscount_Smart_Controller #define REPRAP_DISCOUNT_SMART_CONTROLLER Polish translation was done in Google translator probably ;), 'Ubity'? LoL Starting to love Marlin firmware especially with the ReprapDiscount smart controller. All the language  translations are in the file language.h, choose your language and voila :). Of course some of the translations aren't perfect. // Languages // 1  English // 2  Polish // 3  French (awaiting translation!) // 4  German // 5  Spanish // 6  Russian ...

This one was made by myself, my very first 'home made' hotend for my Prusa Air 2 3D printer, 0.4 mm nozzle, 2 x 6r8 resistors, 3mm filament. Made of brass and ptfe. Pic.1 just another reprap hotend... The one from Pic.1 was based on my first hotend I got on ebay, which started to leak ABS after few days of printing (Pic. 2). Yeap, this black 'thing' is a melted ABS.. My version worked quite well but I didn't have time to fully test it. I can only say that PTFE is not great for higher temperatures, probably it would last longer if used with PLA:175-180 degrees but it gets too soft at 230.. Pic.2 Leaking PTFE hotend

Here is the nozzle printing small herring bone gear with 0.25 layer height

Here is one of the hotends for my reprap I'm working on.. PEEK is definitely a better choice than PTFE. It fits perfectly Greg's Wade reloaded  extruder Pic 1.  cold end without hex lock screw as you can  see ;) Pic 2. hot side, with 6R8 3watt ceramic resistor Pic 3. Total length of PEEK part is 40mm  And here is a small part printed with MK I ,nozzle used 0.3mm 3mm filament