![]() If you dry and retest, you may get a better result. If your spindle motor fails the test, you may want to make sure the problem is not with the connector, which may have coolant on it that’s interfering with your results.If your reading is infinite or significantly over 2 Ohms, you probably have an open. If you get a reading of 0, you have a short between phases. Each time, you should get a reading of around. Test T1 to T2, T2 to T3, and T1 to T3.How to Test Your Spindle Motor for Open or Short in Windings This should allow you to isolate your problem. While testing, make sure the leads on each end are not touching other leads or anything else. Assuming you did not get an infinite reading, disconnect the motor from the cable and test each separately. ![]() If you get a zero reading or any continuity reading, you have either a motor problem or a cable problem. If the reading is infinite, your motor should be fine. Check each wire, including T1, T2, T3 and the ground wire.Start by completely disconnecting the spindle motor from all power sources.How to Test Your Spindle Motor for Short to Ground We recommend this meggar test only as a start to figuring out what could be wrong with your motor winding and always follow with a surge test. Here is a basic breakdown on how to check motor windings with a multimeter, keep in mind this is just a quick way to determine if your motor is in need of further testing or a full rewind. ![]() If you have access to a multimeter, it’s easy to determine if you have an immediate problem. If you think you may have bad spindle motor windings, it’s important to know how to test a motor. How to Test Motor Windings with a Multimeter ![]()
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