first impressions of the Lego smart brick, before I do any actual tearing down: wow, I forgot how good they are at working with plastic.
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first impressions of the Lego smart brick, before I do any actual tearing down: wow, I forgot how good they are at working with plastic. the injecton molding remains impeccable, at least for this specific piece (I know about their recent QC issues elsewhere)
it's hard for me to look at the positively microscopic (I am literally using a microscope to look at it) "Li-Ion" lettering and think of anything but "showing off!"
(treehouse doesn't let me attach the full size images, you can grab them here: front, side)
on the side, there are microscopic openings for the speaker to move air through. I would have really liked to be a fly on the wall in a meeting with the mold engineer who had to make this happen
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on the side, there are microscopic openings for the speaker to move air through. I would have really liked to be a fly on the wall in a meeting with the mold engineer who had to make this happen
I'm not yet sure how I'll open it up. I don't have a hacksaw (somehow... I should fix that), so my options are somewhat limited: it's either cracking or melting plastic. from what others have done I know I there's plastic welding all around the joined region.
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I'm not yet sure how I'll open it up. I don't have a hacksaw (somehow... I should fix that), so my options are somewhat limited: it's either cracking or melting plastic. from what others have done I know I there's plastic welding all around the joined region.
okay I've decided on an idea: I will heat up the plastic to make it pliable and then cut it with a knife
as a knfe girl, this is my professional obligation.
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okay I've decided on an idea: I will heat up the plastic to make it pliable and then cut it with a knife
as a knfe girl, this is my professional obligation.
here's a video that shows in more detail the moldwork in the transparent plastic part
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okay I've decided on an idea: I will heat up the plastic to make it pliable and then cut it with a knife
as a knfe girl, this is my professional obligation.
@whitequark Saint Catherine of the Knife
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@whitequark Saint Catherine of the Knife
@pdo have you ever heard the life story of the Saint Equal-to-the-Apostles Princess Olga of Kyiv? I'm similar.
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okay I've decided on an idea: I will heat up the plastic to make it pliable and then cut it with a knife
as a knfe girl, this is my professional obligation.
@whitequark you can also melt the ABS plastic used in LEGO bricks chemically by placing it in contact with certain other plastics, e.g. those used in fishing lures. presumably heat would accelerate the reaction, which takes weeks-months at room temp
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@whitequark you can also melt the ABS plastic used in LEGO bricks chemically by placing it in contact with certain other plastics, e.g. those used in fishing lures. presumably heat would accelerate the reaction, which takes weeks-months at room temp
@migratory fascinating!
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here's a video that shows in more detail the moldwork in the transparent plastic part
if you've never heard of anybody opening welded plastic this way, i can now tell you why: because it's a bad idea. until you heat ABS to the point where it flows (which you don't want here, as it'll make later teardown even worse), it acts rubbery. imagine cutting hot rubber. doesn't work
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if you've never heard of anybody opening welded plastic this way, i can now tell you why: because it's a bad idea. until you heat ABS to the point where it flows (which you don't want here, as it'll make later teardown even worse), it acts rubbery. imagine cutting hot rubber. doesn't work
@whitequark do you have a hot wire?
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@migratory fascinating!
@whitequark an anecdote from someone else here https://old.reddit.com/r/lego/comments/15wtg6n/melted_legos_what_happened_what_should_i_do/
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@whitequark do you have a hot wire?
@bob i don't have any nichrome at hand and i'm pretty sure i'd give myself burns if i tried
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if you've never heard of anybody opening welded plastic this way, i can now tell you why: because it's a bad idea. until you heat ABS to the point where it flows (which you don't want here, as it'll make later teardown even worse), it acts rubbery. imagine cutting hot rubber. doesn't work
@whitequark somewhere I got a little saw blade for my rotary cutter. It isn't a Dremel brand blade, and I've never seen it again, but it is perfect for stuff like this.
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first impressions of the Lego smart brick, before I do any actual tearing down: wow, I forgot how good they are at working with plastic. the injecton molding remains impeccable, at least for this specific piece (I know about their recent QC issues elsewhere)
it's hard for me to look at the positively microscopic (I am literally using a microscope to look at it) "Li-Ion" lettering and think of anything but "showing off!"
(treehouse doesn't let me attach the full size images, you can grab them here: front, side)
@whitequark Lego plastics are something else…
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@whitequark somewhere I got a little saw blade for my rotary cutter. It isn't a Dremel brand blade, and I've never seen it again, but it is perfect for stuff like this.
@danlyke yep. but I don't have any rotary cutter atm, had to get rid of 90% of my tools when moving to the UK
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if you've never heard of anybody opening welded plastic this way, i can now tell you why: because it's a bad idea. until you heat ABS to the point where it flows (which you don't want here, as it'll make later teardown even worse), it acts rubbery. imagine cutting hot rubber. doesn't work
@whitequark That certainly matches my experiences of working with ABS!
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if you've never heard of anybody opening welded plastic this way, i can now tell you why: because it's a bad idea. until you heat ABS to the point where it flows (which you don't want here, as it'll make later teardown even worse), it acts rubbery. imagine cutting hot rubber. doesn't work
it did however let me lop off the top of it easily
this is I think a 2.4G antenna?
next step is sanding
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it did however let me lop off the top of it easily
this is I think a 2.4G antenna?
next step is sanding
@whitequark thats supposed to be an antenna? I find fascinating how anyone engineered this into existence
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@whitequark thats supposed to be an antenna? I find fascinating how anyone engineered this into existence
@analog_feelings that is one of the more ordinary 2.4G antennas I've seen yeah
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@analog_feelings that is one of the more ordinary 2.4G antennas I've seen yeah
@analog_feelings but to answer your question, a combination of instinct, experience, and simulation. a lot of simulation. (and prototyping too)
