Jon Elson wrote: > Kirk Wallace wrote: > >>On Sun, 2008-06-08 at 01:21 -0500, Jon Elson wrote: >>... snip >> >> >>>Your last order of servo amps may be included in this batch. >>>If the power transistors say "FB260" on them, they need the fix. >>>If they say "31N20D" then they don't. >>> >>>Jon >> >> >>My amps have FB260's. Should I put some caps on them? >> I have another test. Try running the system exactly as it is when the inductors overheat, but with the motor disconnected. If it still overheats, you can remove C14 and C15 (right near the power connector). These are the capacitor part of the output filter. Of course, this will allow the servo amp to radiate EMI, but it will remove part (maybe a major part) of the circulating alternating current from the inductors.
Let me know what you find, I'm still trying to decide if this is a major problem in all applications, or only a concern on spindle drive applications. Jon ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
