well, this brings up an interesting question, what is the best way to share these files? I assume I can't just attach them. What file sharing site do you recommend?
DougM On Tue, Jun 14, 2011 at 1:33 PM, Peter Loron <[email protected]>wrote: > Ah! Yeah, that would be great, thanks! > > -Pete > > On 06/14/2011 01:29 PM, doug metzler wrote: > > I did roll my own - let me know if you want me to send the Eagle PCB > files > > and BOM. > > > > DougM > > > > On Tue, Jun 14, 2011 at 1:20 PM, Peter Loron<[email protected] > >wrote: > > > >> On 06/14/2011 08:53 AM, Kirk Wallace wrote: > >>> On Mon, 2011-06-13 at 13:47 -0700, Peter Loron wrote: > >>>> Hello, folks. Can anybody comment on using hall effect switches on a 3 > >>>> axis mill for limit / home switches? Seems like they would have some > >>>> possible advantages over physical contact switches. > >>>> > >>>> Thanks. > >>>> > >>>> -Pete > >>> My Hardinge lathe uses Hall limit and home sensors. The Z axis target > >>> magnet is small and mounted such that there is minor protection from > >>> chips. There is a small gap between the magnet and sensors when > aligned. > >>> If chips are in the magnet area, they get wiped off, but not too small > >>> such that small chips don't bind in the gap. the magnets are weak > enough > >>> to have largesh chips fall off. The trip location accuracy only needs > to > >>> be within about 2 or 3mm because, in my case, the home sensor is used > in > >>> conjunction with the screw encoder index, which should be accurate > >>> to .002mm or better. What I like about Hall sensors is that they are > >>> machining fluid proof and will practically never wear out or change the > >>> trip point or behavior over time. I tend to think using mechanical > >>> micro-switches is silly, but a lot people use them to good effect. The > >>> Hardinge Z axis uses a Hall sensor with magnet in a micro-switch > >>> housing: > >>> > >> > http://sensing.honeywell.com/index.cfm?ci_id=154286&la_id=1&Ne=7&sid=1308EB555700&ci_id=154286&N=3591+4294966517&la_id=1 > >>> Short URL: http://alturl.com/v2jzu > >>> > >>> These are mounted in a location well protected from chips, but the area > >>> is not sealed from coolant, which is fine because the sensors don't > mind > >>> fluids. > >>> > >>> The Z sensors are in an aluminum threaded barrel similar to this one: > >>> > >> > http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=480-3256-ND > >>> Short URL: http://alturl.com/netsd > >>> > >>> They tend to be expensive, but it should not be too difficult to > machine > >>> a barrel and pot an IC sensor with leads into it > >> Yeah, I'm going to roll my own...I have a pile of Allegro sensors here. > >> Also, retail on the Honeywell sensors is probably more that I've got > >> invested into the whole mill... :-) > >> > >> -Pete > >> > >> > > > > ------------------------------------------------------------------------------ > EditLive Enterprise is the world's most technically advanced content > authoring tool. Experience the power of Track Changes, Inline Image > Editing and ensure content is compliant with Accessibility Checking. > http://p.sf.net/sfu/ephox-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
