gixxer

Have to add my bit to this. I work within an engineering department for a multinational company. I spent many hours researching which printer to purchase. The three main reasons for choosing the UM2 where 1. The Quality/Reliability of the unit 2. The level of community support and feedback 3. Open source. An Open source environment allows the a much richer and effective community support network which intern provides invaluable feedback to improve and innovate. That is unless you have millions to throw at R&D. If I was purchasing an inkjet printer from HP I couldn't care less if it was open source or not, because I know when I hit print to works. 3D printing has a long way to go before we can hit print and out pops your model. I understand why you want to protect your hard work and investment as a company but, I think the support and feedback you'd gain from involving the 3D printing community would far out way the losses from clones (and lets be honest if its successful you could patent the nozzles off it and still find a thriving eastern market based on your designs). This is not to say I'm not interested, cant wait to find out more about it! Just feel a little uneasy about purchasing a closed source item for such an open source printer.

Been printing rubber bungs for work all day yesterday and had a really bad headache all night! Got another full days printing ahead today. There really needs to be a list generated for all the filament types along with there toxicity. This would allow us to identify which filaments require ventilation and which ones you can just leave a window open while printing. Link to Material Safety Data Sheet for NinjaFlex - http://dzmlsvv5f118.cloudfront.net/wp-content/uploads/2013/11/MSDS-NinjaFlex.pdf?afe842 Here are some relevant extracts: ACUTE TOXICITY: IRRITATION/CORROSION: Not likely to result in irritation in solid form. Thermal decomposition may result in release of toxic airborne contaminates which can be irritating to eyes, skin and respiratory tract. FIRST AID MEASURES: INHALATION: Not likely to result in irritation in solid form. Thermal decomposition may result in release of toxic airborne contaminants. Remove exposed individual to fresh air and keep the person calm. Assist in breathing if necessary. Immediate medical attention required. EXPOSURE CONTROLS / PERSONAL PROTECTION VENTILATION: During fused deposition modeling operations, use with ventilation adequate to reduce levels of air contaminants below that which may cause personal injury or illness. Local exhaust ventilation that removes air contaminants from the breathing zone is preferred. General, mechanical, or dilution ventilation may be suitable. RESPIRATORY PROTECTION: Wear a NIOSH-certified (or equivalent) organic vapor respirator as needed. SKIN PROTECTION: Wear gloves when handling hot materials. EYE/FACE PROTECTION: Wear splash goggles to protect from hot molten substance/product. GENERAL: Wear protective clothing to prevent contact during hot melt conditions. When using, do not eat, drink or smoke. After use wash hands with soap and water. STABILITY AND REACTIVITY HAZARDOUS DECOMPOSITION PRODUCTS: Carbon monoxide, carbon dioxide, hydrogen cyanide THERMAL DECOMPOSITION: No decomposition if stored and handled as prescribed/indicated. Thermal decomposition above the indicated temperature is possible ( > 230 °C). Prolonged thermal loading can result in products of degradation being given off. I really don't want to be a scaremonger here but I print this filament at 240 °C on my UM2! Organizing an extraction system as I type this! As nallath points out there is no need to panic, but its well worth baring in mind the potential hazards associated with printing this and other filaments. We really do need to find out just how much of each type of fume is released in a "normal" printing scenario to asses the realistic dangers.

Think this would be a great option to add. Those not comfortable modifying the feeder would then have the ability to switch filament mid print. We could take this a step further and have a fast retract like on the material change. You can never have to many options in my opinion as it increases the versatility of the printer. Could we have the entire advanced maintenance options available in the pause menu. Perhaps in an advanced section =)

Hi everyone, Had my UM2 for about a month now and love it! I've been experimenting with different filaments and after having difficulty feeding ninjaflex with the standard feeder switched to the one by iRoberti. This worked great from the off (however the latch would only last 2 to 3 days before failing when printed solid from PLA, Nylon 6 solved that though). I realised that with the new feeder I could switch filament mid print to achieve multi coloured prints. I see this has been done before, but then wondered if I could mix flexible with pla filament. Couldn't find any reference to this being done before other than with dual extruder. Turns out it works like a charm! Hats off to iRoberti for an excellent mod. There's some pics in my gallery but not sure how to get them on my post. I'm in the process of getting a feeder based on Roberts design machined out of aluminium at the moment. I'll let you know how it goes and I should have worked out how to get pics on here by then. Edit: Thanks JonnyBischof, Pic added ( Posted from my mobile original so the my media didn't show up)