On 2 August 2013 23:08, Greg Bentzinger <skullwo...@yahoo.com> wrote:
> I saw a retrofit that used new AC servos that doubled the rapid rates. It > appeard to run great for nearly 2 years - then radical failure - the loads > had been too much and the bolts holding the "Y" axis ball screw broke - I > think that some bolts broke over time but the last few all failed at once and > the bolts holding the ballnut let go and the force was enough to pull the > bearing through the end support on the far end of the ballscew. The end > support was a total loss. The bolt hole threads in the machine casting were > distorted and were drilled out and re-tapped the next size for heli-coil > inserts. After the repairs were completed the parameters were reset to 125% > of what the machines original rapids were, and with less agressive > accelleration. I would lay good odds that that was a result of the original designer getting lucky :-) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
