Delta Tau Geo MACRO, User Manual And Reference Manual

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Geo MACRO Drive User and Reference Manual
Connections 33
Digital Hall Commutation Sensors
Many motor manufactures now give the consumer the option of placing both Hall effect sensors and
quadrature encoders on the end shaft of brushless motors. This will allow the controller to estimate the
rotor magnetic field orientation and adjusts the command among the motor phases properly without
rotating the motor at power-up. If this is not done properly, the motor or amplifier could be damaged.
Note:
These digital hall-effect position sensors should not be confused with analog hall-
effect current sensors used in many amplifiers to provide current feedback data for
the current loop.
Hardware Setup
The Geo Drive accepts digital hall sensor inputs.
X1 is for motor #1 and X2 for motor #2.
The wiring diagram on the right shows an example
of how to connect the Geo drive to Digital Hall
sensors.
Function Pin #
U 8
V 21
W 9
T 22
5V 12/24
GND 13/25
2
3
4
5
14
15
16
17
1
6
7
18
19
8
9
20
21
10
11
22
23
12
13
24
25
Hall Sensors
U
V
W
T
5V
GND
Shield
X1/X2
SSI Encoders
Geo Drive was designed to work with either Gray Code or Binary Style SSI Encoders. The Geo Drive
takes the gray/binary code information and converts it into a parallel binary word for absolute and
ongoing position data.
Hardware Setup
The differential format provides a means of using
twisted pair wiring that allows for better noise immunity
when wired into machinery.
The wiring diagram to the right shows an example of
how to connect the Geo Drive to an SSI encoder.
Function Pin#
CLK+ 6
DATA+ 7
CLK- 19
DATA- 20
ENCPWR/5V 12/24
GND 13/25
Note: We assume the SSI Encoder power requirements
are for 5V, else use of an external power supply for the SSI
encoder is required. Tie together the Geo Drive GND and
the power supply for noise immunity
2
3
4
5
14
15
16
17
1
6
7
18
19
8
9
20
21
10
11
22
23
12
13
24
25
+5V
GND
CLK+
DAT+
DAT-
CLK-
SSI
encoder
X1/X2
Shield