2012/7/6 BRIAN GLACKIN <glackin.br...@gmail.com>: > I am a bit baffled. > > Why would you add milling capacity to a plasma table (other than to say you > can do it)?
Because it is so much cheaper than 2 separate machines! And yes, it will help my marketing, if I will have such a combo machine. > My impression of a plasma table is a basic gantry with minimal > mass. The only resistance in the system is your slides of whatever > variation you use. By adding milling, even with a snall router, you are > adding both mass and cutter resistance. This significantly increases the > overall mass of the gantry and the size of the components (servos, drives, > etc) required to operate. Of course, the gantry beam itself has to be larger. But motors do not necessarily have to be bigger, maybe a little... It will simply have bit less of acceleration with the increased mass. My readings on web are telling one thing - the cutter resistance is small, relative to forces, needed to overcome to achieve decent acceleration (numbers were not mentioned, but I am calculating for 1 m/s^2 accelerations). > Since your only looking to have a small milling area... This is not entirely true. I know that most of the jobs will be relatively small, but I have few ideas that will need routing pretty large parts. And the same for plasma - most parts will be small, but it has to be able to take up also 2500x1250 sized sheet. And one more thing is that plasma will be used for steel sheets, router will be used for soft materials - mostly aluminium, but I already know that I will have at least few jobs for wood as well. 2012/6/28 John Thornton <bjt...@gmail.com>: > > A marking device like a spring loaded center punch with a pneumatic > cylinder to push it down would be a nice addition if the plasma cut > parts need any machining like drilling after cutting. That would save > the second op a ton of time in not having to lay out holes. Can anyone suggest a nice and compact motor for spindle? One of the machines will actually need this exact setup for the exact reasons pointed out. And the idea was to put a small drill in a spindle that would mark the spot by stopping at certain place, pushing down the pneumatic cylinder for a second or two, then pulling it back and moving on. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ 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
