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edgar-meyer

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  1. I am printing PLA on an Ultimaker Original; 220C at 25mm/sec. Print proceeds smoothly for 10-12 hrs and then fails. A plug forms to restrict filament feed. Do I need a lower temperature for PLA?
  2. Great news the new print nozzle works - I've been running successfully for 24+hr. print jobs. only a year late, but soooo much better Thanks, EM
  3. Great thanks b.t.w., are there size=memory limitations? I need to work with .stl files from 100mb to 1-2gb. EM
  4. First, thanks to Daid and Joergen, I installed the 'new and improved' rev.3 spring+ballbearing extruder drive and the v.2 extrusion head. Mirable dictu, the printer ran flawlessly for 8 hrs to give an excellent model. Now, a question, I would like to download and run Cura 12.10 on my iMac (10.6.8) but am overwhelmed by the insertion of Python, PySerial, xwPython, NumPY and PyOpenGL. Help - is there a step-by-step recipe for creating a running update - or has it already been done and ready for me to download? Thanks, EM
  5. great please point me to some of the pitfalls and corrective procedures you encountered and can you point me to a table of physical properties of PLA filament? I find noticeable melting point differences in several color types - the official Ultimaker sales page is sparce thanks, EM
  6. Daid, I had been running Cura 12.08 with occasional success using magenta PLA, but at elevated temperatures (~260 deg. - it may be my thermocouple is not calibrated) anyway, I have run through a giant magenta spool and have no more, but I do have other colors... so I chose red, being 'somewhat' like magenta, and I eventually discovered 1) that I had to feed and print at least at 260C but when I tried to increase the temperature, the program killed the job because of a temperature overload - 2) then I discovered on the red PLA spool a melting point of 260-265C - none of the others give t
  7. Joergen, thanks to your suggestions, especially increasing the temperature, I was able to complete a 9-hr print - joy upon joys! unfortunately, I have ?wasted? a full roll of the pink PLA getting to this point and while I bought several different colors of PLA, I did not buy more pink. I started working with silver PLA but it seems to have different physical characteristics (melting point, optimal temperature range?) do you have any experience with the properties of the different color-types of PLA? I have come to the conclusion that the Ultimaker is mechanically well designed but misera
  8. Symptoms of the illness unto death... The v2 drive bolt has a diameter of 0.307"=7.798mm, so the circumference is 24.5mm The teeth of the bolt leave a repetitive pattern on the PLA filament with a periodicity of ca. 20mm. But, when the printer becomes sick, before dying, the periodicity drops to ca. 10mm. The drive bolt tries valiantly to feed the filament properly, but it finally is packed with PLA and filament feed grinds to a stop, while the x-y-z drives speed merrily along. So, have any of you UltiWizards encountered filament feed problems? And how did you overcome them? thanks, E
  9. Using Cura 12.08, starting with a clean feeder (v2) bolt and nozzle, clear passage of the PLA filament (no block at the PFL-brass tue connection), calibrating pink or silver PLA steps/E, using a nominal 50mm printing speed, locating a plausible temperature hi-low range, trying to optimize the tension of the white Deldrin or the ball-bering feed clamp, and with abundant optimism, I am able to print small 'wigets' . However, a serious 9hr print job consistently fails after 1-9 hrs., after a month (actually more) of trying to optimize parameters to arrive at a successful model. It is humbling
  10. running Cura 12.08, I calibrated the feed distance as 108mm, which gave e steps/mm as 809.2 I set this number in Cura and generated the 'fine' option. I checked the Gcode file and it still had as the first actionable line: M92 865.888 so I edited it to M92 E809.2 and started the printer both windows listed input parameters the line: Echo external reset was followed with Echo steps oer unit Echo M92 X Y Z E865.89 all of this was checked after I trustingly ran the printer, which printed PLA (pure, light air) after 20mm of a 30mm print job. So where do I set this parameter and know th
  11. step 2 - continued... shat is a 'ball park' number for the number of steps per mm? thanks, EM
  12. Thanks step 2 seems especially relative - I am using Cura 12-08 - so I get the number of steps from the value for the nozzle size or from the filament diameter - or elsewhere? EM
  13. Glad it works for you. But, by holding the filament lightly, I have felt a 'jerk' which I presumed was the filament releasing tension. So please tell me, what parameters have you varied and optimized at the hot end: temperature? nozzle size? filament size? (affecting extrusion volume), filament feed rate? or am I missing something? thanks, EM
  14. As the photo shows, the hobbed bolt makes a slight imprint on the PLA filament as it advances. As the photo also shows, the imprint is spiral, indicating a spiral twist to the PLA filament - until a tension point is reached, where the PLA filament returns to rest position and the process repeats itself, about every 20mm or so - and here's the rub, as best I can tell - the PLA filament is scarred in transition and the residual PLA begins to till the grooves of the hobbed bolt. Ultimately (i.e., usually shortly before the end of a print session!) the grooves and gnarled surface of the hobbed
  15. Working with PLA filament, I can print for several hours before the printer fails - usually towards the end of the job - reliably fails. It appears that the trouble is twofold: 1) the filament is stiff, as it should be 2) the knurled bolt in the feed mechanism has spiral threads, forcing the filament to twist until it cannot go further, thus resetting itself to a relaxed position and restarting the twist procedure - the periodicity is ca. 20mm when it resets itself, it is abraded by the knurled bolt, eventually filling up the grooves with PLA, ultimately causing the bolt to slip and stop
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