Alex_RDPRobotics

Yes there is often a tradeoff of speed vs quality bu it's not a linear slope is it? Thank you for that input I'll experiment.

Hi GregValiant, thank you for your response, that makes sense. I am finding that I get underextrusion if I reduce temperature with the ultimaker, so I have not been able to drop down to 225, using polymaker PETG. I have noted that there are some nozzles with extended tips so as to put more distance between the body of the nozzle and the print but have not seriously explored those. Perhaps I should look more carefully at its tendency to underextrude and try harder to reduce the nozzle temp.

Hello All, As I said in my most recent post, happy holidays, I hope you and your families are doing well wherever you are. I have an ultimaker 2+ and have recently been branching out in materials. I have been working with PETG for some time now, though I still prefer Alloy 910 for many of my prints due to its toughness, though the moisture absorption properties of nylon are a bit of a pain to deal with at times. I have several spools of PETG I had to purchase for a consulting project and have been gradually going through them for a development project of my own. I get pretty good output if I use, for a 0.4mm nozzle 0.15mm layer heights on PETG. But once one crosses to 0.2mm layer heights the quality becomes absolutely terrible - stringing, blobs, zits, etc. I have done quite a bit of tuning and made some improvement but wonder if it's simply a PETG issue - keep the layer heights only up to 0.15mm for a 0.4mm nozzle. I've gone through many temperature and retraction tuning settings, but when there are many retract type flow start/stop movements for a part the quality seems to really drop on 0.15mm and for 0.2 becomes aweful. Is there anybody who has really dialed this in such that, regardless of the number of retracts (assuming reasonableness of course) you are satisfied with a 0.2mm layer height? Any insights on doing so? I'm not sure if I really like or dislike PETG because it's a bit of a pain for certain parts and comes out beautifully for others. Its temperature tolerance is great - I've used it in places where PLA lost its shape holding a warm thermal camera. It can be strong but is definitely more brittle than alloy 910. Doesn't warp, but this stringing and blobs/zits issue is a not so fun aspect. I have dry filament and gone through what I have read typically on retraction and calibration for this material, but maybe I'm missing something obvious. Best, Alex

Hello All, I hope you are having a wonderful holiday season, and producing many prints for friends and family as well as productivity. I have an Ultimaker 2+, and have had great experiences printing PLA/+, ABS, Nylon (Taulman 910, bridge, 645, etc) and most recently PETG (but PETG's a different rabbit hole). I have been recently expanding my repertoire as I am designing a new version of my robotic limbs (a whole other topic as I'm developing some novel robotics that should hopefully benefit many people...plus I also design parts with and for my 4 and 5 year olds) and need some flexible filament for various aspects. I am working out the correct settings for TPU and for some reason ordered 90 vs. 95, so a bit more flexible. I have had a decent set of calibration parts with minimal changes to the TPU95A generic profile, but need to definitely improve them and the reliability of the prints. I was wondering if anybody who has personal experience with this brand and model material (or at least TPU generally on bowden type printers) could share tips and insights or point me to a topic where this has been discussed in detail. I apologize if I missed a previous discussion about it. I have read quite a bit of the typical pages that appear on the major sights, several youtube videos, etc so I have a sense of what is typically said about TPU. That being said, experience literally using the materials on the specific printer type is really more reliable so I would love to hear (and would be immensely grateful for) anybody's insights. Happy printing! Glad to be reaching out, and hope the conversation will be useful for others too. Best, Alex