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JohnInOttawa

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JohnInOttawa last won the day on November 11 2018

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  1. This is related to a cross post in tips an tricks. I have a TPU print that seems to have excessive travels across a feature, each one creating a string and roughness along the inner wall. Is there any technique, setting, plug in or other suggestion to force the travel moves to take place within the boundaries of the walls? I know this would greatly slow down the print, even if it were possible. Time is not a factor but print quality is.
  2. I am printing the pictured item in TPU (Cheetah). While I really like this material, it is prone to stringing and retraction is not really a great idea as it is prone to stretching in the bowden tube when I do that. You can see the travel moves, each one of them is resulting in a string and associated rough spot on the face at either end. I'd appreciate your thoughts on ways to reduce the problem, particularly the intense travel activity across the top part. Thanks in advance! John
  3. Thanks for the update Adam! I hope you and yours are well. Once travel is a bit more practical, I'll reach out your way. Cheers John
  4. Hey Adam. I hope all is well. Did this printer sell? All the best John
  5. Good afternoon everyone. I hope this finds you and yours well. Like many here, I'm pushing my printers to supply the front line. Watching my better half don her scrubs and head into the clinic is a powerful motivator. Speed is important but so is accuracy, so I am looking at ways to improve. There are many mods that aim at reducing the translation of shaking from rapid moves into the table or as noise. Looking at my CNC bed, the solution there was the opposite. Go as heavy as possible on the supports and immobilize the base. It was even suggested that we fill the aluminum extrusions with concrete or sand to add weight and inertia. So back to my UM3. I am thinking the box is pretty rigid, but perhaps it could be more so. I'd like to hear your thoughts on the base and ways to mitigate vibration and shaking. Thanks and stay healthy! John in Ottawa.
  6. Bump! I have a UM3 and am just finishing a spool of ultimaker PLA, would like to reuse this roll for another brand, the main reason is that the other brand spool is incompatible with the rear holder. That means, I think, that I have to reset the material amount. I don't know what hardware I need to write to this NFC tag or whether a UM3 can do that. I have to think it can as it updates the material amount? Thanks John
  7. Thank you both. @burtoogle, thanks for sharing your link. One question - do I need to upgrade my firmware to the latest version in order to use your updated Cura load? Much appreciated. John
  8. Good afternoon everyone. I have a rather pressing question. I am printing visor holders - over 3 hours with a 0.4 nozzle, but I have a 0.6 (hardcore) available. The problem I face is that Cura 3.4.1 cannot recognise the 0.6. I believe 4.5 does. I have been following the stability issues with firmware and Cura. I can't afford to brick my printer at the moment. I would like to know if there is a way to recognise or otherwise use a 0.6 in Cura 3.4.1 or, alternatively, install 4.5 in a way that does not screw up my 3.4.1 install. I also don't know what firmware level 4.5 requires. I have been printing with my 0.6 successfully with other materials, but I am concerned that, as this print has a narrow slot for holding a plastic visor sheet, that the 0.6 nozzle may lay down too wide a line and so make that slot gap too small. Thanks for your help. John
  9. Good morning everyone. I'm looking for advice. After a successful test print of a visor 'hoop' (remix of the Prusa RC2 which was the pick of the doc near me) in PLA, I need to print a number of these in a material that can withstand a bleach solution or alcohol spray. For some reason all of the print recommendations reference PETG. I have some nylon on hand, three rolls of T-glase and of course lots of PLA. I will stay away from the PLA, just because it's not recommended by anyone, but don't want to waste the filaments I have experimenting and have never used the t-glase (the rolls had just arrived in December). So, I would dearly love input from those who have successfully used T-glase on a UM3. What print settings work, how should I prep the bed and at what temp should I run it. I do have some Ultimaker print adhesion sheets, it looks like these have been recommended elsewhere as a way to prevent glass bed chipping. Open to thoughts. My wife's clinic is already running low on visors so the sooner I can print these up the better. Thanks!! John
  10. Completely agree. More a question on how we might verify a supply of what is needed before we take on a product request. I appreciate this is coming together quickly and we'll fill in the blanks as we go. What's the normal time frame from signing up to appearing on the map? You are probably already dealing with a backlog, at least I hope so! 😉 Good on you John
  11. On a related note, there are probably a number of ultimakers out there potentially sitting idle for one reason or another. Is there a way to put out a public call to check for eligible printers and perhaps connect with the nearest active hub that can put the printer to work? I know there are many complexities with doing so, not the least of which is social distancing requirements, but given that these printers wipe down pretty well and we already use isopropyl on the print beds, this might be a way to multiply the number of printers we can bring to bear. One further thought - some of the business where there are bound to be many of these printers, are shut down. If there is an essential service that these printers can provide, perhaps limited access to employees, again, respecting social distancing, can be granted to permit the printers to function. John
  12. I've tried to fill out the form as best I can. As for materials, I guess it will depend on the need. I have lots of PLA but limited nylon, a fair bit of PETG. Maybe we can put together a chart of what materials are best and safe for what medical applications, any other info like tendency to promote static electricity or things that might interfere with medical devices would be good to know too. Here we go! John
  13. Ditto here in Ottawa. Form is flagged. Happy to help! I can't see the form so this next question might be answered, but if we can be connected to sources of filament that are remaining open and known to work with the parts we need to make, that would be excellent.... Great initiative. Best wishes to all and your loved ones. John
  14. I don't have an S5 but have looked at this off and on since its release. Not to be too picky here, but how did we get to the point where one needs a distributor to correct a firmware update? I don't live anywhere near a distributor. This would be a big deal. I get the hazard warning with stored charges and the advice to avoid exposure is wise. But the philosophy behind such a creation, coming from Ultimaker of all places, surprises me. Now, this place is full of people waaay smarter than me. Is there any possibility down the road of creating an interface unit that can allow a field recovery without risk of death? I mean, seriously, what will we do when the S5 is no longer supported by distributors? J
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