Delta Tau TURBO CLIPPER DRIVE User Manual
Turbo Clipper Drive User Manual
Breakout Board: Wiring, Software Setup
22
Note
Spacing specs between DB-Connectors can be found in
Appendix section.
Appendix section.
The standard encoder input channels on the Turbo Clipper Drive Drive are designed for
differential quadrature feedback. To use single-ended encoders, the negative pins (i.e. CHAn-)
have to be tied to reference (Pin#7) in series with a 1Kohm resistor.
Quadrature encoders provide two digital signals to determine the position of the encoder/motor.
Each nominally with 50% duty cycle, and nominally 1/4 cycle apart. This format provides four
distinct states per cycle of the signal, or per line of the encoder. The phase difference of the two
signals permits the decoding electronics to discern the direction of travel, which would not be
possible with a single signal.
Typically, these signals are 5V TTL/CMOS level, whether they are single-ended or differential.
Differential encoder signals can enhance noise immunity by providing common mode noise
rejection. Modern design standards virtually mandate their use in industrial systems.
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
CHA+
CHA-
CHB+
CHB-
CHC+
CHC-
+5VDC
GND
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
CHA+
CHB+
CHC+
+5VDC
GND
1
.2
K
Ω
1
.2
K
Ω
1
.2
K
Ω
Differential Quadrature Encoder Wiring
Single-Ended Quadrature Encoder Wiring
Note
For single-ended encoders, tie the negative pins (i.e. CHAn-) to
reference (Pin#7) in series with a 1Kohm resistor.
reference (Pin#7) in series with a 1Kohm resistor.