28125 Parallax Inc, 28125 Datasheet - Page 130
28125
Manufacturer Part Number
28125
Description
TEXT ROBOTICS
Manufacturer
Parallax Inc
Datasheet
1.28125.pdf
(360 pages)
Specifications of 28125
Title
Robotics with the Boe-Bot
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
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You can use Table 3-1 to record the data for your own transfer curve. Keep in mind that
the example program is controlling the right wheel with the values you enter. The left
wheel turns in the opposite direction.
Remember that the
12, 650
ms,
Duration
Pulse
Width
(ms)
1.300
1.310
1.320
1.330
1.340
1.350
1.360
1.370
1.380
1.390
PULSOUT 12, 660
√
√
√
√
√
Mark your right wheel so that you have a reference point to count the
revolutions.
Run TestServoSpeed.bs2.
Click the Debug Terminal’s Transmit windowpane.
Enter the value 650.
Count how many turns the wheel made.
=
sends pulses that last 1.3 ms to P12.
=
=
=
650
Rotational
Velocity
(RPM)
. 0
1
650
3 .
0013
×
m
×
2
s
. 0
µ
s
000002
s
PULSOUT
Table 3-1:
sends pulses of 1.32 ms, and so on.
Pulse
Width
(ms)
1.400
1.410
1.420
1.430
1.440
1.450
1.460
1.470
1.480
1.490
s
command’s
Duration
Rotational
Velocity
(RPM)
Pulse Width and RPM for Parallax Servo
=
=
=
=
655
. 0
. 1
655
Duration
00131
31
×
×
m
2
. 0
Pulse
Width
(ms)
1.500
1.510
1.520
1.530
1.540
1.550
1.560
1.570
1.580
1.590
s
µ
000002
s
s
PULSOUT 12, 655
argument is in 2 µs units.
s
Rotational
Velocity
(RPM)
Duration
=
Pulse
Width
(ms)
1.600
1.610
1.620
1.630
1.640
1.650
1.660
1.670
1.680
1.690
1.700
=
=
=
sends pulses of 1.31
660
. 0
. 1
660
00132
32
×
×
m
2
. 0
s
µ
Rotational
Velocity
(RPM)
000002
s
s
PULSOUT
s
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