Greetings; This one is a 1.5 horse, 8 amps nameplate rating, air cooled which at low speed isn't goping to work at all well anyway, and at 20 Hz drive I am quite dissapointed in its torque, 3 or 4 oz/in when the torque boost is disabled. I can stop and hold it between thumb and forefinger quite easily. Turn the torque boost, range 0-4, up to 0.5, and the apply frequency to 50Hz, about doubles the torque but that would be of limited usefullness at a 20% duty cycle max is it heats badly, hitting 130F at the front bearing plate in about 7 or 8 minutes just laying on the table spinning. So I think its not going to be terribly usefull for g33.1 tapping unless I add another 10/1 range between the motor and the backgear input the current motor drives. Reversing times are well subscond at 200Hz drive, so the added gear would seem to make up the missing torque.
I've attempted to gain access to removing the collet but have failed as it appears to have a spanner hole equipt ring that may be setting a bearing preload, so I am hesitant to put a wrench on the collet flats and try to loosen it with a set of tru-arc pliers. Making a short stub shaft to put the existing drive gear from the OEM motor on the stub and chucking up the 1/2" sticking out seems like a bearing life shortener because of the amount of unsupported shaft between the bearings and the gear. But that looks like the only choice if the collet cannot be easily removed. That of course will need mount extensions to make room for the gear train. All thats do-able of course once a suitable set of gears are in hand. Boston Gear to the rescue I suspect. The front, also black coated ring doesn't seem to meet the piece its screwed to with some short 4mm screws, which when I inspected it first, was pulled up a bit lopsided with two screws quite tight and the third one quite loose leaving a noticeably uneven gap between the parts. That spanner hole equiped ring on the rear of the collet prevents its removal, as if the hole in that ring is smaller than the spanner hole equiped nut. So it looks as if the spanner holed ring may be the first to come off, then this stationary part behind it next, but not knowing whats bearing preload, I didn't go any farther. Has anyone done that collet removal from one of these motors? And can guide me on the procedure? I'd druther not make a $180 pile of junk out of it. Thanks. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
