[Noisebridge-discuss] Nate True's printable jacket cuff lights
Gian Pablo Villamil
gian.pablo at gmail.com
Wed Mar 10 17:20:03 UTC 2010
That's odd, Bre left the heated build platform fully functional, and
with a sheet of instructions. If I recall correctly, it was connected
to a fan connector on the power supply, and you actually had to run
the fan for the build platform to heat up.
On Tue, Mar 9, 2010 at 3:57 PM, Mike Ashmore <motomike at gmail.com> wrote:
> So yesterday I spent a few hours with the Makerbot trying to print up a cuff light or two.
> I've never used the bot before, so Rubin helped me get started, downloading all the software I needed on my laptop and converting the STL files to gcode. The heated platform wasn't actually connected to any sort of power, so for my first attempt we printed a raft onto one of the fluorescent orange plastic stages. That actually worked pretty well until the raft started curling, and we aborted the printout.
> Thus incentivized, I decided to get the heated stage working. We tried simply plugging in the heater element to the A outputs on the extruder controller board - this did not work. No voltage on the heater circuit at all. I concluded the controller board wasn't going to provide power to the heater unless we had some feedback about what the stage's actual temperature was. Reasonable enough.
> So I checked out http://pleasantsoftware.com/developer/3d/2009/11/23/how-to-connect-the-2nd-thermistor/ and followed the instructions there to build the thermistor feedback channel. I'm not entirely sure the thermistor we found was exactly the 100K part specified in the instructions; when I connected it to the ohmmeter its readings varied between 85-140K depending on its temperature.
> Anyway, ultimately I got a circuit built that matches the schematic on the instruction page and plugged it into the control board. And the stage heats up! But it does not, according to Mike Kan's thermal imager, heat up to the temperature specified in the control software - it seems to come up pretty far short. It's quite possible that my janky construction of the feedback circuit is to blame here - it's kinda tricky to keep everything low-profile enough to not interfere with the extruder's Z-axis travel.
> So that's where we stand today. I tried and tried printing things, tweaking heater settings, fussing with extruder temperatures, but nothing wanted to stick to the stage. Probably 'cause the stage isn't getting hot enough. Probably 'cause the thermistor loop is a janky piece of crap that I built out of spare wire and electrical tape.
> I'll be back some time this week to take another stab at the thermistor loop, v2.0.
> On Mar 8, 2010, at 3:37 PM, Gian Pablo Villamil wrote:
>> Yeah, Bre and Zak worked on it a couple of weeks ago. They installed
>> the new heated build platform, which means you don't have to print a
>> raft to get work to stick to the platform, and stuff prints with a
>> lot less warping. So it should be working great.
>> Also Bre left some of the new colored ABS plastic.
>> On Mon, Mar 8, 2010 at 11:24 AM, Rubin Abdi <rubin at starset.net> wrote:
>>> doctor popular wrote, On 20100308 105031:
>>>> This could be a good excuse
>>>> to experiment with the Makerbot or learn some sewing or soldering
>>> This shouldn't be too hard to print with the Makerbot, though I'm not
>>> too sure what the current state of our bot is. The last ones to touch it
>>> were Bre and Zak, so I'd guess the thing most likely works. I would be
>>> down with dropping by on Wednesday and seeing if I could get the bot to
>>> print something.
>>> Rubin Abdi
>>> rubin at starset.net
>>> Noisebridge-discuss mailing list
>>> Noisebridge-discuss at lists.noisebridge.net
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