On Thursday 14 February 2013 21:23:03 Pete Matos did opine: > Steve, > I have heard that before tho about the helical beam couplers even > if they are stainless steel it can break. Honestly I never really cared > for oldhams but do they make ones for this application with differing > sized bores and with the ability to stand up to the approx 9.5 NM > torque and a dirty environment generally? I would imagine that they > might be cheaper as well since their design is simpler supposedly. I > just want a zero backlash solution that will stand up to the abuse for > a LONG time... peace > > Pete
And while the machine isn't very big, mine have stood the test of time. Some pix on my web page, under the emc (linuxcnc/) link. > On Thu, Feb 14, 2013 at 6:02 PM, Steve Blackmore <[email protected]> wrote: > > On Thu, 14 Feb 2013 11:53:33 -0500, you wrote: > > >I like oldham couplers the best. If you have a run-away, the only > > >thing > > > > that breaks is the disk. Yes.. they can wear out if you have a bad a > > major misalignment.. but, in general > > > > >they last a long time. The also are easier to install because you > > >can > > > > install each hub on the shafts and then just insert the motor.. you > > don't have to try to undo the hub if you > > > > >need to remove the motor. I like them better than love-joy or > > >spider > > > > type too because those have a bit of give in them. Helical or Beam > > couplers are nice for Routers, but, on > > > > >this sized machine, you would need to use stainless steel ones, and > > >not > > > > aluminium, AND, you might still have windup issues.. > > > > I won't use helical beam couplings on anything. As said previously - > > they snap all too easily and if you have any backlash, they wind up > > and you may never get the full linear movement if there is any > > resistance. > > > > I snapped one on my router in less than 5 minutes and threw that and > > the other two in the scrap :) > > > > I too like Oldham couplings - I've made a few sleeves that fit the > > common coupling OD's - they make initial lining up easy for mounting > > motors or ballscrews. If the alignment is good they last many hundreds > > of hours too. > > > > Steve Blackmore > > -- > > > > > > ---------------------------------------------------------------------- > > -------- Free Next-Gen Firewall Hardware Offer > > Buy your Sophos next-gen firewall before the end March 2013 > > and get the hardware for free! Learn more. > > http://p.sf.net/sfu/sophos-d2d-feb > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------ > ------ Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 > and get the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> I'm not even going to *______bother* comparing C to BASIC or FORTRAN. -- L. Zolman, creator of BDS C I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
