heated bed size control? - Ultimaker

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Message from discussion heated bed size control?
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Date: Wed, 3 Oct 2012 02:17:28 -0700
Message-ID: <CAJa3Yu5G7oXyW9vFDOVdeqoXFidpPC75dZ16JH8HHEe4q29...@mail.gmail.com>
Subject: Re: heated bed size control?
From: Taylor Alexander <tlalexan...@gmail.com>
To: ultimaker@googlegroups.com
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Borosilicate glass might work?

On Wed, Oct 3, 2012 at 2:16 AM, Dave Head <kibb...@gmail.com> wrote:

> ah ok makes sense.
>
> On Wed, Oct 3, 2012 at 10:00 AM, Bernhard Kubicek <
> bernhard.kubi...@gmail.com> wrote:
>
>> The problems are:
>> * any "normal" glass on such a bed would break easily if heated only in
>> one section.
>> * An aluminium bed  solution would spread out the heat to a big region
>> anyhow, and leaving gaps in the aluminium would not work well either, i
>> fear.
>>
>> Bernhard
>>
>>
>>
>>
>> On Wed, Oct 3, 2012 at 10:37 AM, kibble <kibb...@gmail.com> wrote:
>>
>>> Hey
>>>
>>> was thinking why can you get a size controllable heatbed.
>>>
>>> i guessing alot of people who print dont use the whole bed but only a
>>> small part lets say 50mm squared?
>>>
>>> from the old days when you had a old over with the rings on top
>>>
>>>
>>> http://www.mrappliance.com.au/WebRoot/ecshared01/Shops/mrappliance/4C76/FF90/A811/D3BE/9580/C0A8/D240/2039/Electric_Oven_Element_HP-01T_01.jpg
>>>
>>> i think the more power went through it the more the heat expanded to
>>> the edge of the ring less power only used the inner part if you know
>>> what i mean.
>>>
>>> could this be done in the say way with a pcb or would there be a good
>>> chance of a. electrocution and b. melting the place down
>>>
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>>
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Borosilicate glass might work?<br><br><div class=3D"gmail_quote">On Wed, Oc=
t 3, 2012 at 2:16 AM, Dave Head <span dir=3D"ltr">&lt;<a href=3D"mailto:kib=
b...@gmail.com" target=3D"_blank">kibb...@gmail.com</a>&gt;</span> wrote:<b=
r><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex">
ah ok makes sense.<div class=3D"HOEnZb"><div class=3D"h5"><div><br></div><d=
iv><div class=3D"gmail_quote">On Wed, Oct 3, 2012 at 10:00 AM, Bernhard Kub=
icek <span dir=3D"ltr">&lt;<a href=3D"mailto:bernhard.kubi...@gmail.com" ta=
rget=3D"_blank">bernhard.kubi...@gmail.com</a>&gt;</span> wrote:<br>


<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">The problems are:<br>* any &quot;normal&quot=
; glass on such a bed would break easily if heated only in one section.<br>


* An aluminium bed=A0 solution would spread out the heat to a big region an=
yhow, and leaving gaps in the aluminium would not work well either, i fear.=
<span><font color=3D"#888888"><br>
<br clear=3D"all">Bernhard</font></span><div><div><br><br>
<br><br><div class=3D"gmail_quote">On Wed, Oct 3, 2012 at 10:37 AM, kibble =
<span dir=3D"ltr">&lt;<a href=3D"mailto:kibb...@gmail.com" target=3D"_blank=
">kibb...@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
>



Hey<br>
<br>
was thinking why can you get a size controllable heatbed.<br>
<br>
i guessing alot of people who print dont use the whole bed but only a<br>
small part lets say 50mm squared?<br>
<br>
from the old days when you had a old over with the rings on top<br>
<br>
<a href=3D"http://www.mrappliance.com.au/WebRoot/ecshared01/Shops/mrapplian=
ce/4C76/FF90/A811/D3BE/9580/C0A8/D240/2039/Electric_Oven_Element_HP-01T_01.=
jpg" target=3D"_blank">http://www.mrappliance.com.au/WebRoot/ecshared01/Sho=
ps/mrappliance/4C76/FF90/A811/D3BE/9580/C0A8/D240/2039/Electric_Oven_Elemen=
t_HP-01T_01.jpg</a><br>




<br>
i think the more power went through it the more the heat expanded to<br>
the edge of the ring less power only used the inner part if you know<br>
what i mean.<br>
<br>
could this be done in the say way with a pcb or would there be a good<br>
chance of a. electrocution and b. melting the place down<br>
<br>
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</blockquote></div><br>

<p></p>

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