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ultiman

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  1. No. I had those with lower temperatures. Now ABS sticks so tightly to the glass that I have hard time removing the ready object, even when the glass has cooled down. However, I have one observation: In my printer the heating element has bent down so that the glass is not in good contact with the element. It means, that the heat don't transfer from element to the glass very well. The heat sensor is in the element, so that it doesn't actually measure the glass temperature but the element temperature. So, I have no idea what the glass temperature is. And, as some areas or element are in good contact with the glass and some aren't, there probably is some temperature variation within the glass. How many degree, I don't know. I think, that warmer is better, you don't easily get problems with too high temperature but rather with too low. I encourage to raise 1st layer nozzle temp and 1st layer bed temp. I used even 275C and 130C. But my bed can barely reach 130C, it takes 40 mins to heat up (the last 10...15C increases very slowly).
  2. I've got good results by raising the extruder temperature. I print with following settings: Ext: 1st layer 265C, upper layers 260C. Bed: 1st 115C, upper 110C. (C = Celcius)
  3. I see. Actually, that's my point. I guess PLA would perform much better against other materials when the weakest orientation would be chosen. You can't always choose the optimal orientation for your print (forces may be multi-directional or some other reason may prefer printing direction which is not optimal for strength). So, knowing the properties of materials from suboptimal printing direction would offer even better judgement for selecting the material.
  4. Hi! Nice test, I was looking for something like this. However, one important detail is ignored: Printing orientation of test pieces. Some materials (especially ABS) tend to be much much weaker in Z-direction than in XY-plane. Therefore it may make huge difference if you print the test bar in horizontal or in vertical position. Now that you're already experienced with these tests, I encourage you to perform comparison tests with items (of same or different material) that are printed in horizontal vs. vertical position. It would be very interesting to see the results...
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