I'll be doing the clamp shaft/cut shaft approach. I don't want to do the adapter plate, because the face of the motor is already exactly right for the holes and precision bore. I will need to make some new shaft couplers though, as the only shaft was 14mm and the new one is 19mm, and the shaft coupler clamp screws won't permit reboring. It is a rigid coupler, so should be easy to make new ones.
Thanks for all the ideas everybody. -- Ralph ________________________________________ From: andrew beck [[email protected]] Sent: Monday, October 18, 2021 2:21 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Shortening motor shafts CAUTION: This email originated from outside the Walla Walla University email system. Same here yeah clamp shaft. Cut with cut off blade, done. 5 min job. Or make a 5mm thick adapter plate. And rotate holes 10 degrees. Also very easy. This is probably what I would do unless the motor pcds are already fitting to motor frame which is unlikely. On Tue, 19 Oct 2021, 03:39 dave engvall, <[email protected]> wrote: > I use 1/16" grinding discs all the time for such. I think I'd arrange to > clamp the shaft not the motor frame so as to > reduce vibration on the bearings. It it amazing what those discs will do > at reasonable speeds. > > Dave > > On 10/17/21 10:27 PM, andrew beck wrote: > > Quick and easy way is to use a 1mm cutting disc on a angle grinder. > > > > Slightly harder option is put it in a mill, > > > > clamp the shaft and cut 5mm off > > > > Just don't bang on shaft and you will be sweet. > > > > I would definitely not take them apart that's a headache > > > > > > On Mon, 18 Oct 2021, 18:12 Ralph Stirling, < > [email protected]> > > wrote: > > > >> I just got a great deal on three 750w brushless servos and drives to > >> upgrade my cnc mill. They have the same face dimensions, but the shafts > >> are 5mm longer than the old brush servos. There was no clearance between > >> the motor shaft and ball screw inside the coupler, so I need shorten the > >> 32mm long 19mm diam shafts by 5mm. Can this be done without damage to > the > >> motor from heat or vibration? I don't want to have to pull the ball > screws. > >> > >> Thanks, > >> -- Ralph > >> > >> _______________________________________________ > >> Emc-users mailing list > >> [email protected] > >> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C64026174067f4506d9b408d9927d60e5%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637701889471629810%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pfK%2B5Fjh8WqNDP%2FdixYe13vnBXKnZOilEYl7jAOzayM%3D&reserved=0 > >> > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C64026174067f4506d9b408d9927d60e5%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637701889471629810%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pfK%2B5Fjh8WqNDP%2FdixYe13vnBXKnZOilEYl7jAOzayM%3D&reserved=0 > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C64026174067f4506d9b408d9927d60e5%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637701889471629810%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pfK%2B5Fjh8WqNDP%2FdixYe13vnBXKnZOilEYl7jAOzayM%3D&reserved=0 > _______________________________________________ Emc-users mailing list [email protected] https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C64026174067f4506d9b408d9927d60e5%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C1%7C637701889471629810%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=pfK%2B5Fjh8WqNDP%2FdixYe13vnBXKnZOilEYl7jAOzayM%3D&reserved=0 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
