Sprenger Spindle Prusa V1/V2

thingiverse

Originally it was a Prusa i3 from Geeetech. It's now more of an ongoing process! How it all started: A capacitive sensor sparked the idea! Then, the GT2560 gave up on me with 24V after three months. Then I switched to Ramps and swapped out the stepper motors! I decided to turn it into a test bed for my next printer. I picked up a new frame from Capt Piquard.(http://www.thingiverse.com/Piquard/about) He's a great guy, very friendly, fast, helpful, and an expert at his craft ! So we decided to create a new project, testing steep-threaded spindles in x and y combined with igus parts. Thanks to igus for their amazing support Current Status: still up and running V1. The RADDS 1.5 with RAPS128 arrived. This combo is still printing out all the parts used for this mod! Almost all the parts were created in CAD (except the holder for the printer). The frame is complete. The last parts came this morning! (01.07.16) all the parts are here all the parts have been printed We'll see The new heatbed (completely). First come the other things)(Tiffany-style found at Dr-Henschke.de) Mods: Hall-E-Endstops have been ordered - I got them RADDS Expansion board has been ordered - I got it Ordered 4 other stepper motors from nanotec. ST4118L1804-A with 0.5 Nm for Z ST4118D1804-A with 0.8 Nm for X/Y Z is running fine, but a little bit slow, I hope the nanotec is a little bit faster (the motor holds 0.5Nm up to 300 turns/minute) X/Y looses steps because the motors don't have enough power to hold the point when the direction changes after a traveling period I'll change to E3D V6 Hotends. The Dual MK8 Extruders are too heavy. I demounted one and the prints don't loose steps. The prints are fine, but it's not fast enough It looses steps, not as much as with two extuders, but when Vref is all right, the motors become too hot. If Vref is a little bit too low, the motor hasn't enough power! Cooling the motors helps. I ordered two mk8 heatsinks and two 30mm cooler for the x-y stepper motors! The Raps 128 become very hot, too. The RADDS housing will be recreated with 100mm cooler I ask myself, why some people say that they can print 300mm/s! with a GT2 2mm Belt, 20-22 tooth -> 40-44mm/full turn. A standard NEMA 17 from Asia makes not more than 100/120 turns/min (12V) -> 1.x-2 turns/s -> 70-88mm/s. I don't say 300mm/s is not possible, but you need nearly 8 turns/s or 480 turns/m I'm thinking about the Diamond Nozzle and a marzipan extruder for the quick change extruder carrier If someone knows the parameters to print multicolor with RGB colors instead of CMY with the diamond nozzle, your welcome. I want to use 5 Nozzles. The Diamond with RGB, one with black and one for PVA (e.g. Innosolve) Update: 25.07. The nanotec stepper motors works fine. I'll tell more about them, when Piquard has sent me the new CNC parts. The height adjustable endstop holder for Hall-E are working fine.http://www.thingiverse.com/thing:1689289 (When minimizing the height, you have to change the height value in EEPROM and save it. Use a smaller value than the real one. After that you have set G29) Unfortunately, my wife's illness takes up a lot of time and money. So, I finished this project without any new information here! I got a new heater for the printing bed. It was expensive, but it has been built for me by a professional company. The e-chains are from igus. The V2 is ready. Photos and more will follow! Next Step is a full water-cooled edition of this spindle Prusa. V3 can you find here:https://www.thingiverse.com/thing:2835175 But that's it for now! The printer works very fine, but the prusa has conceptional mistakes. So, I'll develop a totally new concept. Tho most things are in my head. I'll try to find some sponsors to help me developing it.