Encoder Signals; Single-End Encoder; Differential Encoder; Characteristics - IMS MDRIVE 17 Operating Instructions Manual

E n c o d e r S i g n a l s
S i n g l e - E n d E n c o d e r
D i f f e r e n t i a l
Note: Rotation is as viewed from the cover side.
(C)
(X/Y)
(Z)
(Po)
C h a r a c t e r i s t i c s
Parameter
Cycle Error ......................................................................................... 3 .......... 5.5 ......... °e
Symmetry ......................................................................... 130 ....... 180 ....... 230 ......... °e
Quadrature .......................................................................... 4 0 ......... 9 0 ........ 140 ......... °e
Index Pulse Width .......................................... P o ........... 6 0 ......... 9 0 ........ 120 ......... °e
Index Rise After CH B or CH A fall ............. t 1 .......... -300 ...... 100 ....... 250 ......... ns
Index Fall After CH A or CH B rise ............. t 2 ............ 7 0 ........ 150 ...... 1000 ........ ns
Over recommended operating range. Values are for worst error over a full rotation.
22
Figure 1.3.3: Single-End Encoder Signal Timing
E n c o d e r
Figure 1.3.4: Differential Encoder Signal Timing
One Cycle: 360 electrical degrees (°e)
Symmetry: A measure of the relationship between X and Y,
nominally 180°e.
Quadrature: The phase lag or lead between channels A and B,
nominally 90°e.
Index Pulse Width: Nominally 90°e.
Symbol Min
Rotation:
100 to 1000 Lines
CW – B Leads A
CCW – A Leads B
2000 Lines
CW – A Leads B
CCW – B Leads A
Rotation:
100 to 1000 Lines
CW – B Leads A
CCW – A Leads B
2000 Lines
CW – A Leads B
CCW – B Leads A
T y p Max Units