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Printing my first self-designed part 😬 Did it with OnShspe+Cura... haven’t used CAD software since 1996, which was ancient version of ProEngineer. Things have really advanced a lot. Browser+cloud-basedwith version control and all sorts of other crap.
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Had 3 semesters of drawing as an undergrad (93-94)... 2 on paper drafting, 1 on Autocad 2d. Taught myself basic solid modeling on ProE my sophomore summer at my dad’s office (he ran the design department for a division of tata steel). Clearly I’ve forgotten most of it.
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Also kicked the tires on the online library stuff. Downloaded and printed this cat cookie cutter from thngiverse
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I give up. I’ve tried icing it, a spatula, swabbing isopropyl alcohol around edge, hammering gently from the side...
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At this point I’m considering drilling a small hole so I can insert a rod and try to pride the damn thing off. It’s either that or give up on this build plate and get a new one.
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Dammit. Drilling a hole and trying to lever it off didn’t work. Simply ripped the top off. This is with super draft low-fill setting
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Okay. Got it off. I slipped a box cutter under one edge just enough to get spatula under it, and that was enough leverage to get it off. Done building directly on build plate. Gonna try either blue tape or kapton tape.
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Replying to
Well, no harm done except for one teeny scratch on build plate, which won't matter since I plan to tape it up now anyway.
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I *think* the most likely reason I'm getting extreme sticking while most people seem to suffer from insufficient sticking is that my nozzle might be too close to the print bed, making my bottom layers too dense. See this thread
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Replying to @divalbanerjee and @vgr
In the future, try to level the print bed so that it’s slightly lower. It seems like the bed is just slightly too close to the nozzle. It will be a frustrating process, but worth doing imo
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The way to test this would be to run an experiment at different bed levels with the same print, and measure the force needed to get it off, but I don't want to... direct on plate is too temperamental for my tastes. Gonna try taped up approach next.
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i like to just use one strip of blue tape on a corner, basically to give myself somewhere i can then easily work my spatula into. but i also use rafts so the slight un-evenness isnt an issue
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You might try laying the first layer down at a reduced temperature...there is gcode that can do this...alternatively contact-paper as a bed-coating worked for me...basically 'large tape'. Spray with hairspray...then peel off.
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careful with blue tape, sometimes the first layer doesn't grip the tape very well, just keep watch over it for the first few layers there's really nothing better than tiny knift + spatula combo
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What bed temp and extruder temp were you running? Bed temp especially has a big effect on how much a print sticks. Also slicer programs have options to add a skirt around the edge or "raft" underneath the print which can make it easier to remove