Encoder Signals; Characteristics; Figure C.2: Differential Encoder Signals - IMS Mforce micro drive Reference

Temperature
Operating ................................................................................................................ -40 to +100° C
Storage ..................................................................................................................... -40 to +100° C
Humidity ............................................................................................................ 90% (non-condensing)

Encoder Signals

Differential Encoder
Note: Rotation is as viewed from the cover side.
(C) One Cycle: 360 electrical degrees (°e)
(X/Y) Symmetry: A measure of the relationship between X and Y, nominally 180°e.
(Z) Quadrature: The phase lag or lead between channels A and B, nominally 90°e.
(Po) Index Pulse Width: Nominally 90°e.

Characteristics

Parameter
Cycle Error ................................................................................................ 3 .................... 5.5 .................°e
Symmetry ............................................................................. 130 ............ 180 .................. 230 ................°e
Quadrature ............................................................................ 40 .............. 90 ................... 140 ................°e
Index Pulse Width ..............................................Po .............. 60 .............. 90 ................... 120 ................°e
Index Rise After CH B or CH A fall ................... t1 ..............-300 ........... 100 .................. 250 ................ns
Index Fall After CH A or CH B rise ................... t2 ............... 70 ............. 150 ................. 1000 ...............ns
Over recommended operating range. Values are for worst error over a full rotation.
Appendices

Figure C.2: Differential Encoder Signals

Symbol Min
Rotation:
CW – B Leads A
CCW – A Leads B
Typ Max Units
A-13