Showing posts from July, 2012

New J-head tip

So when my last hot end melted down it was because it was clogged and i didnt know this so i heated it up more to try and get the plastic to flow again. little did i know that PEEK (the body of the hot end) melts at 245 C so when i tried to extrude at that temp it pushed on the newly soft melting plastic and caused it to fall out.

   Happy to say i got a new tip from the all new and shinny Mk V-B .5mm this time around, and it works great! i have not had any things go wrong with it thus far. I have printed out a few small things because I've been having some problems with my ABS sticking to my cold bed (I'll post about that at a different time)

  So now I'm extruding ABS with no problems at 220 C  (I printed that raspberry pi case on the left with it)

link on the reprap forums to my problem 

Ben Bot

Starting a new 3D printer design. The reprap at one point wanted to have the most printed parts and least about of hardware in a printer. But i feel as if they have lost this idea. The new repraps are made out of like 20% and 80% screws, bolts, and rods. So what my friend Logan Farr and i have done is started to think of ideas on how to make our own fully printed 3D printer. Here are some of the ideas we have had!

1. using the 3mm filament for belts (not printed but still your own plastic)

2. we have been looking into some different joints to make it so the printer in cut into 8 main pieces and connects in the middle of the pillars.

3. we have been thinking of way to print our own rods and bolts for our Z mount

4. It's a cute because the idea of printing extension pieces to make its self bigger is in mind for sure.

5. It's going to have bottom mounted Z motor mounts. Because on the prusa mendel the motors bind up some times

 The only thing that you will have to buy is the hot…

HDPE recycling

This is my attempt at finding a way to recycle my old reprap bad prints and my old HDPE milk jugs. Pretty much what i have is a huge brass hot end. I thought if it works on small scale why shouldn't it work a lot bigger? so what i have is a pipe with a cap on it and a 3mm hole dripped in it. then wrapped some kapton around the end of it and have nichrome wire around that. then i stripped some cable and put a thermistor on it and plugged this thing in as a new hot end onto my reprap gen6 board. You can see by the picture on the left that it was getting warm. but shortly after this picture was taken it started to go back down for some un-known reason. This is still a huge work in progress, i haven't figured out how to push the plastic down yet or how im going to get that plastic into small enough pieces to really put in this thing. Comment if you have any ideas!

RepRap J-Head melting

My RepRap J-Head Mk-IV-B has melted for the second time now. Both times i have been trying to print with black ABS plastic, I only ever get about one good print before some thing happens with this thing. It keeps getting all jammed. The hobbed bolt in my Wades extruder keeps ripping divots into my plastic because my tip has to much pressure built up in it (if i pull the plastic when extruding with out the hot end on it lifts up the reprap just fine so its not a bad idler pressure). I've tried printing at a few differenttemperatures i had it at 240c before, then i moved it up to 250c so that i could at least get a little bit of plastic to come out. But once i got it up to 250c it melted its self. Now i have to order my self a 3rd shaft and PTFE so that i can try again.

link to it on the reprap forum