When I started converting my lathe over to linuxcnc I bought a switchmode supply (originally intended for telecoms use). It was a bit cheaper than the standard industrial switchers, and about the same price as building a linear from off-the-shelf components.
Trouble was, I had a lot of noise issues, which I put down to my inexperience with PCB layout - I went through three iterations of the interface PCB before buying standard mesa boards. In the end it turned out that that PSU was incredibly spiky (it would create extra steps when plugged into the same ring main 40 feet away, no other machine connection). When I swapped it out for a underpowered spare linear I had the noise issues vanished. I've since replaced it with a bog standard 48V 10A industrial switchmode PSU from RS - which... just works - also mounts to a DIN rail which was a bonus for me. That said, for my current project (sinker EDM) I ended up getting a custom wound 2 kVA 72 V transformer made up - it was cheaper than using three 'standard' transformers in series, and gives me a fairly decent bit of room for surges in demand. I strongly suspect that the next CNC I do will use a large linear power supply, and feed all the drives off that as a DC link. Hope that helps Ben -----Original Message----- From: kqt4a...@gmail.com [mailto:kqt4a...@gmail.com] Sent: 20 November 2012 11:24 To: emc-users@lists.sourceforge.net Subject: [Emc-users] power supplies Would y'all comment a bit power supplies, linear or switching Pro's and con's Do's and don't I see a great many lower priced switching supplies Richard ---------------------------------------------------------------------------- -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
