hmm - When I read this I thought 'No Way!!. This must be a scam or hoax' Reading the comments further down indicates the article is flawed and totally inaccurate. A kidney shaped object was printed. NOT a functional kidney. It was a talk on what may be many years in the future. Read this to confirm the media reports are rubbish to put it mildly. It is a shame though, since if this was true thby AgeingHippy - Tissue Engineering
A hair dryer might work but I use a lighter flame.by AgeingHippy - General
cool - did not realise plumbers tape was PTFE I guess I should decide whether to source a 1-piece nozzle or plumbers tape. Anyone capable of supplying me with a 1 piece brass M6 barrel and nozzle combo bored to 3.1mm with a 0.5mm orifice in the UK? Price? I could always try with my cheap drill press... but not sure how well that will work though, and then I need to source an M6 brass bolt. Anby AgeingHippy - General
NO MAKERGEAR PRODUCTS INVOLVED HERE (don't want to start that pointless argument again ) Hi guys I have a bighead style nozzle which is leaking out the threads up the barrel. I have seen references to plumbers tape, but wonder if anyone has had success with such an approach. Alternatively, if anyone has used any other means to block the leakage that would be usefull to know. I initially had myby AgeingHippy - General
Hey MrJohn I simply wrapped a little aluminium foil around my resistor and shoved it in the hole. This works perfectly well. Might be worth ensuring the aluminium foil does not touch the leads as that may cause a short. Also, insulate your leads so they don't short to the heater block itself. I use heat shrink tubing for this. Cheersby AgeingHippy - General
My personal feelings are if this Rick bloke is using names such as Reprap to do his marketing (which is certainly bringing him business) then he really should not be fighting for trademarking the name an item like a bighead nozzel - or complain if someone uses the term 'similar in style to a bighead nozzel' etc. Otherwise he should not be using terms such as 'Wades' or 'Adrians' when refering toby AgeingHippy - General
One reason an axis may not move in a certain direction is because the endstops are not connected. Either attch the endstops or connect the 2 points to fool the axis driver into thinking the endstops are attached. Do your investigations re fooling the driver. Be carefull not to connect the wrong 2 points and short something out. see testing the stepper driverby AgeingHippy - General
hmm.. well initially the thermal break inner diameter was 3.5mm and my barrel internal diameter was 3.1mm. I got failures pretty quickley as the pressure on the softened plastic in the thermal break was causing the feedstock to swell to 3.5mm in the thermal break just before entering the barrel. This caused feed failures. I fixed this by drilling out my barrel to 3.5mm to a depth of about 7mmby AgeingHippy - Skeinforge
Perhaps it moves away from a bowden extruder but what if one provides a rigid smooth hollow bore to extrude 3mm through with pressure just enough to provide a consistent just in time (JIT) supply for the conventional extruder. The granular feed would be fairly slow and some form of active cooling might be required. You would also be heating the plastic in 2 places. Maybe coupling your filameby AgeingHippy - Plastic Extruder Working Group
That is interesting. Read about the Van de Graaff generator. It's easy to accept google's spelling which turns up a rock band instead.by AgeingHippy - Plastic Extruder Working Group
I take exception to that! rfsneiderb used to sell big head nozzels - I brought one in June last year, so don't tell me anyone has a manopoly on a name of an object. I had never heard of makergear bighead nozzels before this so just because you have not heard it used elsewhere it does not mean makergear has the manopoly on the item! This kind of behaviour in an open source project. Honestly!by AgeingHippy - General
wow - that is a Citroen? Man what a hot looking car!!by AgeingHippy - Reprappers
I think a good starting point is to make the Feed Rate and the Flow Rate the same. For example, I (when my extruder was working) had feed rate and flow rate both at 30. That seemed to be working for me.by AgeingHippy - Skeinforge
Greg - what springs work and how tight does one make these springs...?by AgeingHippy - Skeinforge
I installed the latest download, heekscad16 from over here. It does not have the undo/redo buttons? Am I downloading the wrong version? Cheersby AgeingHippy - 3D Design tools
brnrd I wonder, is your thermal break (PTFE) tight around your filament or is it something like 3.5mm? I have been wondering about the ooze. It needs air to replace what is lost so that is easily provided if the fit is not tight. If you have a tight fit would it perhaps be difficult to replace the vaccum created by the oozing filament with air. I don't know, but I imagine that would certainly mby AgeingHippy - General
Yo Johnrpm (Random Precision?) Thought this link might be usefull.... A dude planning on building a powder printer. Maybe you have already connected, maybe you don't want to connect, maybe 'you is him'. anyway - there it isby AgeingHippy - Powder Printing and Selective Laser Sintering
In addition, the lower torque ones are NEMA14 and the others are NEMA17. The RP parts are designed to take NEMA17 steppers so if you wanted to mount NEMA14s you would need to drill holes etc and generally muck about unneccesarily. Don't know if the 2.7 voltage rating of the NEMA14s would also be a problem or not.by AgeingHippy - General
Hey Loren Perhaps the winder can work on a tension base? ie - keep the tension of the winding constant which will keep the tension on the plastic constant. just a thoughtby AgeingHippy - Paste Extrusion Working Group
Very pretty Onwe thing though. I would recomend placing headers for all connections onto and out of tour board on the extruder mechanism rather than actually soldering the thermistor, heater and motor wires to the board and only providing headers for the connections to the extruder controller. My motivation for this is that you may end up dismantling your extruder many times before it is runninby AgeingHippy - General Mendel Topics
I think an important point is how round your feedstock is, the diameter and how consistent this shape and diameter is. good luckby AgeingHippy - Wanted
On the thingiverse outline page the comments mention putting the outline before Dimension rather than before export (I think that is where the comments stated). I got what you got brnrd, and then moved it to before dimension and now it works just fine. Are you getting E codes otherwise? If not - you need to switch on dimension. Cheersby AgeingHippy - Skeinforge
you learn something new every day. Thanks Bob. Now need to ensure my Z moves correctly... baby steps... lolby AgeingHippy - Skeinforge
erm... I have just put in the spool of PLA I purchased, having finished the sample I was sent and which I have been using up till now for my configuration. I was getting weird results, in that the second layer of my raft was not binding and in fact the plastic was coming out way too thin, ending up in my extruder failing and requiring dismantling. My tests now show I need to heat my block to 23by AgeingHippy - Reprappers
brnrd Wrote: ------------------------------------------------------- > If you just delete the F60.0, then your z-axis > might not move. No feed speed was defined before > the first G1 move command so it would probably use > the last speed used before this part. Ah - I actually removed the first section of code that heats the hot end and primes the extruder. That also resulted in meby AgeingHippy - Skeinforge
Hello All Coming to grips with Skeinforge - Well done Enrique Anyway, My first move from the home position to the first position where the raft will start (or from the last outline position to the first point of the raft) is done at the feed rate of the Z movement. Then the feedrate is again set to Z speed before the first line of the raft. Other movements all seem fine. I wonder if anyoneby AgeingHippy - Skeinforge
Hey Stephen I know this is an old thread, but I wonder if what you have would solve the problem. Is your offset app a pluging for skeinforge? Cheersby AgeingHippy - Skeinforge
Hey Mr John You seem to have gathered a number of backers there. I do wonder though if you are not lining yourself up for a lot of work. For $1 you will produce the prusa mendel parts at cost. What is at cost? Just plastic cost or is it plastic and electricity or does it include time? $900 for a fully built and tested Mendel!! I see though you have limited this option to only one, which is aby AgeingHippy - Wanted
Damn!! My 20x20x10 test print with 20% infill was 1/3rd done when I started watching it, and is only finishing as I type this!! I will need to up my speed lolby AgeingHippy - Plastic Extruder Working Group
Newperfection Do your layers bond well? I understand that if you extrude PLA at too low a temperature it does not bond too well.. I currently have my temperature at 210 Celsius, but I measure it on the heater block. I will be trying printing at a lower temperature later as part of my configuration exercise.by AgeingHippy - Reprappers