Direct Drive Rotary Table
5
Electrical Specifications
Temperature
All motor speed/torque curves are based on 25 deg C ambient with a winding temperature of 155 deg C,
at stall. Ambient temperatures above 25 deg C will require derating. Consult Bayside Motion Group,
Technical Services at (516) 484-5482, ext. 130 for application assistance.
Circumstantial Rotary Encoder
The high resolution encoder has a nominal number of counts per revolution and angular resolution is
determined per table shown below.
The number of counts per revolution can vary by a maximum of +/-280 counts (9.8 arc min.) but is
repeatable. The control of the system can be enhanced by using the actual line count shown on the
calibration supplied on the label of the product.
Although to a large extent a function of the closed loop performance of the total system, repeatability of
+/-3 counts (+/-6.3 arc sec nominal) is achievable.
Commutation
Three commutation signals, developed by hall sensors, are available for proper control of the motor by
your amplifier.
Electrical Characteristics of Hall Sensors
Supply Voltage
5Vdc + 10% (500ma)*
Output Format
TTL (Internal pull-up resistors provided)
* an external power supply may be required. Most amplifiers only provide 260 ma of power.
Intermittent signals may occur.
Signal Timing
The following chart shows the timing of the commutation and encoder signals in relation to the motor
bemf. See section IV, Wiring, for signal pin designations.
Rotary Motor Signal Timing
Rotary Encoder Timing
V
U-V
V
V-W
V
W-U
BEMF
WAVEFORMS
ELECTRICAL
DEGREES
HALL SENSOR
WAVEFORMS
A
B
I
360 +/- 5.5
180 +/- 30
90 +/- 15
90 +/- 30
ALL TIMING IN
ELECTRICAL DEGREES
SEN3
SEN2
SEN1
0
60 120 180 240 300 360
All timing is for CCW rotation as
viewed from the rotary table.
Standard Resolution:2000 PPR
CCW
* post quadrature and interpolation
MODEL NO.
R100D
R150D
R200D
R300D
Nominal Count *
472000
629200
943200
1257200
Nominal resolution (arc sec)
2.8 (2.7458)
2.1 (2.0598)
1.4 (1.3740)
1.0 (1.0309)
Repeatability arc sec
+ 8.4
+ 6.3
+ 4.2
+ 3
Содержание R100D
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