Originally Posted by
mike_Kilroy
Answer these questions and I will give you a best guess of what your motor is rated:
- diameter?
- full length?
- rpm at some voltage?
OK, ur tach checker thing cannot measure speed. do it a different way then. is 24v on it too fast to count rotations of shaft in a given time like 10 seconds? then use jumper cables and put it on your car battery at 12v - can you count revs in given time now? still to fast? put a 1.5v D cell across it surely you can count revs in a given time now!!?? the longer the time the more accurate the result so see if u can count revs for 60 seconds. if possible give us the revs/time for multiple voltages if you want morre accurate motor specs; say 1 d cell, 2 d cells (3v), maybe a 5v power supply, etc. With multiple readings we can solve V=IR+Kb*N and get u better ratings!