Hello,
I just finished the final calibrations of my Folger tech Prusa i3, and I was ready to print a few things. I found
THIS cool VR headset, and it seemed like a good design, and a good challenge. Turns out it was a bit more challenging than I thought.
I have only attempted to print the components relating to mounting the lenses. In the thingiverse post, these are lenses_new_1.stl, and lenses_new_2.stl. The creator says that these are variants of the threaded lens mount that are easier to print. I printed them at 20mm/sec at 0.1mm layer height at 165C with black Hatchbox PLA filament. I had a fan running at about 20% (a pretty powerful fan) and the bed was at 70C. The threaded parts don't seem to want to go together even after sanding. I could sand them even more until they fit, but I want to use this as an opportunity to get my printer working almost perfectly.
I've printed about 4 of these so far, and none of them work. I thought this could be due to over-extruding, but after getting my E steps/mm calibrated, the problem persists.
My main question is why they aren't fitting together, and how to fix this issue. Sometimes they start to thread, but after a quarter turn, they lock up and it becomes nearly impossible to remove them.
My guess would be the fact that when printing overhangs, the layer curls up a little bit. Not much more than 0.1mm, but maybe enough to mess with things. This isn't curling off the HPB, but rather the print curling up due to overhangs.
Any suggestions would be appreciated.
EDIT 12/24 - More information: models sliced with Slic3r with a manual extrusion width of 0.5mm. First layer is 190C (Much lower and it doesn't adhere very well). Printer is the Folger Tech Aluminum 2020 i3. Extruder is a MK7 or MK8, I'm not sure which, but it's direct-drive. Nozzle diameter is 0.4mm. Printed on blue painters tape (although I have kapton available). I have gone through all of
Triffid Hunter's Calibration Guide, and have had successful prints on it before. A few of these can be viewed on my thingiverse profile
here.
What I will do next is measure the model (not quite sure how I'll do that), and try printing at 0.2mm layer height (which is against the directions on thingiverse) with only one object on the platform, but at the same speed, temperature, and fan speed profile as the last one. I will report back with the results once I finish these things.
Thank you for your help.
Edited 2 time(s). Last edit at 12/24/2015 11:18PM by Lazerlord.