[ELECTRON] Proposed new club + Arduino meet up

[Roy Mohan Shearer]

Hm, well I don't have any glass here, we'd nee d to get some cut. I do have
some 2mm aluminium sheets at 203mm x 330mm.
Roy

On 23 January 2012 23:38, Thomas Parry <yrrapt at gmail.com> wrote:

> 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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