ACE Lab PC-3000 Express - 11 Appendix 3. Testing the Motor Winding Coils

01010101100110101010110011010101011001101010101100110101010110011010101011001101010101100110
10011010
1010110011010101011001101010101100110101010110011010101011001101010101100110101010110011010101011011010101011
10101010110011010101011011010101001101010100110101101101101010100101
1011010101100110011010101011010101111010111
11010101101101010100111110
110111
0110110011
0111011110
111101
011
11
1
Seagate PC-3000 EXPRESS / UDMA / PORTABLE 
F3 architecture  ACE Lab
Technical support: ts@acelab.ru
Phone: +7 863 201 50 06
56 ts.acelaboratory.com
11. Appendix 3. Testing the motor winding coils
Motors in Seagate drives use the triangular layout (Fig. 11.1.), so you have to check three pairs of connection points for
drive coils. Resistance between pairs of the coils connection points in a functional drive is ~ 3.4 Ohm. You can
determine the value more precisely for each individual case by measuring the coils resistance on a functional drive
belonging to the same family.
Fig. 11.1.