On Sunday 28 June 2009, Rainer Schmidt wrote: >I have a stepper motor with 4 leads. If I measure it with a DC ohm >meter I get a short between the two leads belonging to each coil as >expected but 80KOhm in between the leads of each coil. I expected none >or some mega ohm indication. Is that normal? >Rainer
No, unless your fingers are also in contact with the test leads, in which case its you that you are measuring, not the motor. :) A clean, dry motor should be many hundreds of megohms between the independent coils. 80k seems like a totally off the wall reading unless the motor has internal corrosion, but generally that would become zero ohms at about the same time the drivers started to actually move the motor, if not just at the power-up. Either way its probably toasted driver you may smell shortly. And that is a definite :-( >---------------------------------------------------------------------------- >-- _______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users -- 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) The NRA is offering FREE Associate memberships to anyone who wants them. <https://www.nrahq.org/nrabonus/accept-membership.asp> The rain it raineth on the just And also on the unjust fella, But chiefly on the just, because The unjust steals the just's umbrella. -- Lord Bowen ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
