<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">I would suggest a board a bit bigger than 160mm in each direction so that you have abed that can handle standard 100x160 pcb. Also I can write you some gcode by hand for flattening, it's a doddle to do simple stuff like that.</div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:em@preseli.com">Emyr Morris</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">29/10/2014 13:48</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:hackspace@swansea.hackspace.org.uk">Swansea Hackspace</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">Re: [Swansea Hackspace] CNC Mill Progress</span><br><br></div><div dir="ltr"><div>I will be going to my dad's in west wales in a few weeks time, he has a shed and a garage full of board, if you have not found anything by then let me know and I will bring back a few pieces. He has good quality ply, chipboard, mdf, everything you can imagine being a hoarder and a carpenter ;-)<br><br></div><div>So it won't be this weekend but the weekend after... maybe having a few spare boards won't hurt anyway<br></div><div><br></div>Em<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 29 October 2014 11:48, Alan Cox <span dir="ltr"><<a href="mailto:alan@lxorguk.ukuu.org.uk" target="_blank">alan@lxorguk.ukuu.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">O> I have seen suggestions that MDF is bad because of the fine dust,<br>
<span>> although someone (sorry i forgot who) donated an old vacuum cleaner to<br>
> use with it.<br>
<br>
</span>MDF is very very flat so while it does need proper ventilation it's<br>
commonly used as a bed (and you are not supposed to saw the bed up). All<br>
wood dust however is supposed to be dealt with properly. It varies<br>
between yew and laburnum (which can kill you) to stuff like bamboo which<br>
is only an irritant under low exposures.<br>
<br>
Under high exposures most sawdust is linked to nose cancers and asthma<br>
which is why commercial wood shops all have those big hoover things on<br>
the bandsaws etc.<br>
<span class="HOEnZb"><font color="#888888"><br>
Alan<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
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