On 8/9/20 10:19 AM, Gene Heskett wrote: > The different support base came off the glass, not easily but a bit easier > than the previous run.
PLA is generally considered to be easier to print but If you printed in ABS, the higher thermal expansion rate (that can cause warping or delamination problems when printing) ensures that the parts will self release from the glass bed when it cools. Around 15 minutes after the print has completed, you'll hear what sounds like glass cracking but it's the ABS popping loose from the glass bed. The cracking sounds continue for another 15 minutes. After approximately 30 minutes the ABS part is completely separate from the glass bed. There is no scraping or prying needed. These violent acts can knock a bed out of level and cause print problems on subsequent prints, and could even damage the delicate motion control components on a 3D printer. I'm currently running a 100 part 3D print job. Each ABS part takes three hours to print. After 3.5 hours, I pick the part off the bed, squirt a couple of milliliters of glue juice (water with a small amount of dissolved glue stick) onto the glass bed, evenly distribute it with a nylon bristle brush, and select Print Another Copy. Easy peasy. PLA doesn't self release as well as ABS, but you should be able to squirt some water around the periphery of the part and it should dissolve the glue that bonds it to the glass build plate. Give it 30 minutes for capillary action to float the part off the glass bed. Even with ABS, I'd recommend 30 minutes for the glass plate to cool. PLA has less contraction when cooling than ABS but the contraction will still greatly help reduce the bond strength between the part and the glass bed. Very little glue is needed. I have best results when I can see only a slightly hazy glue layer on top of the glass. I think it helps to use a nylon bristle brush to scrub the old glue and new glue water into an evenly distributed emulsion. That's a few seconds well spent to ensure a strong first layer bond. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
