I machined part of the sholders off on the brass fitting so it would sit in the carrier and made a plastic nut. The intent is that it matches the groove mount that the EZstruder can work with so well.
The fitting now just sits in the EZstruder like it was made for it.
The bottom piece I just drilled out with a varibit, reamed a bit with a flat screwdriver and pushed hard to get the NPT threads to bite into the plastic. As long as this bit doesn’t get hot enough to soften the PLA I think I should be fine.
The updated short bowden tube.
A google plus auto-awesome animated gif. The right #3DBenchy failed due to a loose connection on the extruder wiring. The left one is my 2nd successful print with the new feed system. The current print is a few tweaks to get it to print faster, better.
Playing with the new Microsoft Hyperlapse app. Lets face it printing videos are only interesting to the people who’s machine it is. The print motion is a bit twitchy, but it’s a twitchy printer. The pan motion is very nice and smooth.
I rebuilt the extruder on my Delta #RepRap again. Trying different things to find something that works for me. This is a cable-laced short bowden tube with no 'real' connectors. Quick and dirty, but it seems to be working well so far.
The cable lacing is where the hold-it-all-together should happen. This is with Spectra fishing line. Same as I used for the drive-line. Low stretch. Should keep the two halves from being pushed apart.
Boom! Wonderful printing all of a sudden.
Installed. The idea is to balance the weight of the motor over the effector so the printer doesn’t have to sling all that weight around.
I used some self vulcanizing rubber tape to try to get some traction on the tube. It should also stiffen up the joints a bit so there is less flex at either end and more in the middle.
This is the prior iteration. The nylon kept wanting to stretch so I kept twisting the extruder around to tighten up the cable lacing. 2.5 full turns here! The nylon also dug into the plastic a bit as well.
I've been fighting it for over a year. First it was a bad RAMPS board/pololu drivers. I replaced that with a SmoothieBoard (which is awesome by the way) and then it took me a month to figure out that my bed center, homing and gcode combo is causing the machine to calculate out-of-bounds which gives some VERY odd movement.
But now it moves right, with just a single config setting change in slic3r. Set the print center to 0,0 and not 100,100 like I do on my Cartesian printer.
So, now I get to re-wire the printer, as the printer has grown a foot taller over the last year. The existing wires are now too short.
The extruder motor doesn’t move near as much as the effector does. I hope this will allow me to get better prints than if I had a long bowden tube or a heavy effector.
Looking down from the top. You can see that the effector moves much more than the extruder motor.
I was SO happy I got it to move right, that I just HAD to mount the extruder right away. With the printer running. I was THAT excited about it moving correctly that I didn’t even stop the test-print.
Looking down a pillar. I was hoping to see the carriage move up and down more and that the belt & spectra hybrid drive works well. But, this is what is shown. Instead, this shows that the extruder motor moves very little in relation to the effector.
I ‘borrowed’ some of my wife’s hair bands and zip tied up the extruder so it balances on a short bowden tube. I saw this at MRRF and liked it so much that I decided to buy a SeeMeCNC EZstruder even though I already had an extruder for this printer.
I tried making a water block for water cooling my MakerGear hot end this weekend.
I failed. kinda…
A bit of background as to WHY I would want to do such a project can be found at http://mike.creuzer.com/2013/01/watercooling-my-makergear-prusa-reprap.html I wanted to improve over the coil of copper being that I am about to re-install my 1.75mm hot end for a few lbs of plastic. Going to try ABS for the first time at this size. Not sure if I am going to have problems with that or not.
My fail is I was too lazy to go out into the cold to drill a hole on the drill press. I managed to salvage my stupid hole with a bit of tubing. Hopefully it doesn't cost me too much in efficiency.
I really have no idea what I am doing when it comes to using a lathe. Learning from YouTube is difficult as many of the videos posted are by people with as much experience as me (about 3 hours at this point).
Well, the next iteration should be better, right? I enjoyed making this enough I wouldn't mind making it again. But with a drill press. I think I will drill that hole first so I know it's right.
Using my UNiMAT lathe to fix my lousy hack saw cut and bring the aluminum block down to the right dimensions.
I turned down the black insulator a bit as I don’t have metric drill bits. The bigger tube is to couple airline tubing together on the OUTSIDE so I don’t get even more restrictions of water flow.
THERE I FIXED IT. I ran a bit of aquarium air hose through the buggered up hole. I am going to lose a lot of heat removal capability, but it lets me temporarily salvage this part. The water going through is in it’s mid 60s, so there is going to be a big difference, so it should pull heat well.
Until I make a new one.
I cut a piece of aluminium in half with a hack saw. The tray did a decent job of collecting the aluminum dust. Terrible surface finish on the cut. I did not do a good job of making the cut straight.
I tried drilling the hole using a hand drill because it’s COLD out in the garage where my drill press is.
I FAILED. I totally didn’t get things where they wanted to go. I’ve a hole on the inside, and a double hole on one end.
I can JUST snap the wooden clip in place with the water block installed. It’s going to be a royal pain to un-clip it.
The water block is small and light. It should work well I hope.
I have this new RepRap 3D printer that I am putting together. It is based on the Rostock style printer. It came to me half assembled, sans electronics. It had been running, but got pirated for parts to make another Prusa.
It has this awesome, expanding, laser cut acrylic case. But the case was set up to only go ‘normal’ Rostock height based on the length of the belts. There is a lot more room on the smooth rods for it to get taller. I just need to make a belt stretcher (I am too cheap to buy longer belts).
I just so happen to have just the thing. I have some fishing line I picked up on clearance a few years ago – $6. It just so happens to be the 65lb Spectra line that people are using to string up their Kossels.
So I decided to do both. Belts for the drive and line for the ‘idler’ side. I also wanted to include the zip-tie tensioner concept I’d seen.
It turns out, that doing this, you need a belt as long as your smooth rods. Conversely you can make your smooth rods as long as your belt.
This begs the question. Is this a Rostock or a Kossel? (Looking at the drive, not the smooth rods vs extrusion frame). Rossel? Kostock?
I know I am naming this machine the Solar Scribbler. It will live in my garage workshop for a few reasons.
The upright rods means that sawdust and crud won’t settle on them near as much. Also the chassis helps keep airborne crud out.
But the garage is getting a few solar panels and some deep cycle batteries installed. So the printer will run on solar power! I figure the deep cycle batteries should be able to power the heated bed to ABS temps without a problem.