Vibration consideration and rigidity are usually more limiting factors in machining than HP. For example, a standard Bridgeport style mill has a 1.5 hp motor. Most formulas give ambitious speed/feed/DOC vs hp based on perfect stability. The forces required to cut are small compared to the forces ensure smooth motion (up milling vs. climb milling) Consider a design approach based on experience (look at what someone has done that works) rather than deterministic choice (formulas).
Mark Center On Mon, Jul 2, 2012 at 2:16 PM, Viesturs Lācis <[email protected]> wrote: > 2012/7/2 Daniel Rogge <[email protected]>: >> >> I was testing in Aluminum, but I think that for a given spindle HP your >> results would be similar in other materials. If you're on an open loop >> machine it's preferable to size the motors such that you stall the spindle >> before stalling an axis motor because it's often an easier failure mode to >> detect. >> > > For X and Y I am looking only at servos. For speed, precision and > reliability. For Z axis and for rotary joints I probably will have > steppers. > >> >> If you're only using small end mills, then the max axis force required is >> simply just a bit more than the force required to snap the end mill. I >> would think that a 6mm end mill wouldn't be capable of delivering 1.5 HP to >> a workpiece. >> > > So that means that machine would get all the 6 mm or even 8 end mill > is capable of? That sound nice! > > -- > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
