I just uncovered that motor on my 7x12 and found three things. 1. Its a 400 watt motor & looks to be well built. Thats a bit bigger than I've been told, and tells me I could up the fuse to 4 amps if I was a mind to.
2. The default rotation is CCW, the belt drive up to the back gear box/spindle reverses the rotation. Should have been obvious, but Duh... 3. From the rear, no visible means of mounting seems to be visible. So I have to assume its mounting bolts must be under the existing speed control, accessible once it has been loosened and laid aside. So this new motor will have to be run backwards, or a gear coupled countershaft made up. Since my present Z motor mount is almost directly inline with the spindle motor due to its 2/1 geardown using old change gears, most anything I build will have to be done inside the space the old motor now occupies. With the countershaft and gear coupling, I have the ability to expand the geardown by quite a bit as the expense of the spur gear noise (obnoxious when the stepper resonates) by re-using the metal change gears I have left over from the CNC'ing. Other than time to make it and some decent bearings for it to spin in, NBD. Some brushed motors I have noted have the brush holders at small angles that aren't conducive to good brush life when running backwards, and which may also effect the motors torque when in reverse. The OEM 400 watters brushes are dead on center. So, what is the general consensus about running one of these smaller treadmill motors backwards? (in the event I can actually make it fit where the old 400 watter was living) Would a day or so's running at no load & medium speed re-seat the brushes and improve the brush life in that event? 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 went to the museum where they had all the heads and arms from the statues that are in all the other museums." -- Steven Wright A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
