[ELECTRON] Proposed new club + Arduino meet up

[Thomas Parry]

We could certainly have a go at making our own PCB heating bed. Will be
pretty simple to do and there's hardy anything lost if it fails.

Tom
On Jan 23, 2012 8:26 PM, "Blair Thompson" <mail at justblair.co.uk> wrote:

> As I understand it Clive. For glass the qualities that makes the
> difference are:
>
>  * It presents a nice flat surface for the plastic to adhere to.
>  * It does not warp when heated
>  * Its pretty light when compared to steel or 6mm thick machine aluminium
>  * Its surface hard to damage when removing parts
>  * Its cheap (£5 per 20cm^2)
>
> The high insulation is actually one of it's downsides.  It takes longer to
> heat up than aluminium, and as it does not conduct heat so well, it must be
> heated evenly for both the quality of the print and to prevent the glass
> cracking.  Some people put heater/thin alu/glass as a combination.
>
> On 23/01/2012 18:51, Clive Mitchell wrote:
>
>> I think glass is often used because it's a good balance between laying
>> down the first plastic and then separating the finished object
>> afterwards.  It's also a good insulator, so that allows the heating
>> element to be placed in direct contact.
>>
>> The PCB based heating plate looks neat.  By specifying a standard
>> copper thickness and fine tuning the track width and length they seem
>> to have come up with a very simple and consistent heating plate.
>>
>> On 23 January 2012 17:45, Kieran Wyse<kieranwyse at gmail.com>  wrote:
>>
>>> It is very likely we are going to make a heated bed( please forgive my
>>> stupidity if this is not the top and bottom plates). Brian has suggested
>>> he
>>> may be able to get hold of some metal sheet but for best results, I have
>>> read, that a glass plate on top is good.
>>>
>>> I don't think a decision has been made but it is likely we will go the
>>> thermistor route copper wire for the heat bed. If you had some lying
>>> around
>>> it would force us to make a decision:)
>>>
>>
>>
>>
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