Hi Ralph, Wow. I had not thought of using thin FR4 and milling it out for a stencil. I do have some fairly thin PCB material used for multilayer stackup. I'll have to investigate cutting my own. That may save some time if properly automated. My only accurate machine is my Bridgeport CNC and it only had a 6000 RPM head unless I drop in a BT40 speed head. Always wanted one of those. Milling with a 0.010" bit at 6000 RPM would be slower than watching grass grow. What is your LPKF RPM and feed rate?
Dennis > -------Original Message------- > From: Ralph Stirling <ralph.stirl...@wallawalla.edu> > To: gro...@homanndesigns.com <gro...@homanndesigns.com>, Enhanced Machine > Controller (EMC) <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] solder paste > Sent: Aug 07 '12 11:35 > > We cut our own stencils with a 0.010" end mill on our LPKF pcb milling > machine. > For material we use 0.005" thick FR4 laminate without copper, purchased in > big > sheets (2'x2' or so) from Insulectro (if I recall correctly). I use the > same paste > in a syringe that we use for the occasional manual dispensing for > stenciling. I > just take the needle off and dispense a bead across the width of the > stencil. I > made a simple frame for holding the pcb and the stencil and use a putty knife > to spread the paste. We do this for complex one-off boards as well as any > boards we make in multiples. > > -- Ralph ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
