Showing posts from 2012

BenBot weekly update

So I found on thingiverse some herring bones gears and rail that some one was using instead of blets (thing:21206) And I had a fantastic idea! Why dont I use herringbone gears for every thing! its not like it takes more plastic or any thing right? So today at thanks giving dinner I was thinking of how I would do every thing and as soon as the family had finished I was off to modal! The guy that I got the gears from only had one size. So I asked him in a comment if he could upload a smaller gear or at least tell me how i would go about making one my self.

    So now to talk about all the ideas and how they work. Before I had to so you had the gears on the rail and a sleeve like thing that went around it, making sure it would not fall off, but now that I have these gears it just has a motor mount and a spot for a 608 bearing under to hold it all nice and tight.

    You can't see it in this picture but it was a j-head duel extrusion mount on that X axis (that I will use a smaller ge…

New joint for benbot

So im having a ton of fun drawing on my note2 i just keep comimg up with new ideas when i can easily draw them in my hand. This is a new idea for benbot.  Because before i wanted to have it all snap and clip togethor. But the more i play with my printed test clips i think that the tiny wobble of the clip would make prints look like crap. So what ive done is come up with a new joint that if printed right, will be just as strong as the rest of the printer.

BenBot and rapman

Ben Bot is an idea I've had for a long time now. But have had very little time to do because of high school. The basic idea is a fully printer printer. I've made up most of the 3D models in blender but I have never tried to put it into more simple terms that people understand, so here is my attempt at doing so.
             I have in the last few days gotten a note 2 and it had this awesome thing that corrects your drawing so that they have perfect lines. All of the red lines are axis rails with teeth on them that the motors will move on, and all the black lines are for structure of the machine so that does not move. With the picture of the box in its own square I was just messing with my new phone and well all sorts of crazy and put all of the information in one picture with a key (the key is for that one picture only). I then got into my artsy side and drew up a Ben Bot logo that I think I'll keep around and actually use as the official logo of this thing.

Prusa mendel printing awesome!

This is my Prusa mendel printing with I think PLA in this video. I really love how good its been printing so I thought that I would put up a video :)

re-thinking benbot

So i have been looking and re-thinking all of the very small things that are wrong with my benbot. I was looking at it and thought to my self that the extruder will limit my print area, and no one wants that! Then I thought of the Ulitimaker. It uses a tube that the filament goes through, and the gear extruder is acutely held off to the side of the printer. So that the hot end can get a max size for the printer.

      I decided that i need that on my printer! So in hope of not having the re-invent the extruder, I hopped on Thingiverse and found my self a duel extruder that works the same way as the ultimaker so this link here will be used in my printer. I guess i will use duel extrusion because with all of the stuff out for it now its like why not! so im working on a way to take that model and make it work on gears. These gears to be exact, because I have no idea how to use opencad and again, I don't want to re-make things that are already out in the world.

     Another thi…

Almost done

I'm super stoked on how far i have gotten with this printer in the last few days. I feel as if not to many people understood how i was planning on the x and y to work so now i have pictures to show. The x ends are my modification thinned out ends to make you able to print more size. and the smooth rods have a little bit extra on the ends so that you can put a gear on the 4 ends so that when the motor moves the one rod it all moves smoothly back and forth.
 This is a grate idea i think. with just one exception... the belt that you need to drive the x has to be tight and would mess up how my y works with it all. it would make it so that i need those thicker x ends and tight rods. But as i didn't want either of those, this idea is now going to change around a little bit.
Because every thing else on this printer is gears why not just make them all gears. so I'm thinking about taking two gear rails and making them replace the smooth rods. then have a smooth strip on top of th…

BenBot rethought out

The picture on the left shows what im planning on for my z bed movement. its going to have the z motor mounted to the bottom side of the bed but with a way of gearing every thing like a geared extruder would. It's all going to be done with one motor and gears, not 2 motors and rods like the prusa mendel is. Doing things this way makes it so that i can print all the parts for it and have a very large z height .

Now this picture (on the right) is the bottom of printer so far. It just has the corers put togethor and all the working clips. im going to be putting in the z shaft latter today. i have to thing if i want it to be printed into one of the corner pieces or if i want it to be able to snap in and out easily. The idea of putting it on clips would make it a bit more easy to scale it all up. but i dont see why its not possible the other way as well.

This is the clip that will be holding every thing together, it fits inside of its self so the model can be cut up and put into a ton…

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