13
Measure acceleration with an oscilloscope connected be-
tween HI SPEED POT 1 and SIGNAL COMMON.
Oscilloscope
should be triggered when RUN (J1 pin #6) goes low.
Then make the following settings:
1. Make sure BASE SPEED ONLY is
Open.
2. Set RUN to
Open.
This signal must be open circuited long enough to allow complete
deceleration.
3. Connect RUN to SIGNAL COMMON (logic low).
4. Measure acceleration time.
5. Adjust Acceleration potentiometer (R2) clockwise to increase
acceleration time.
6. Repeat steps 2 - 5 until acceleration is attained.
The following table gives approximate settings for the Accelera-
tion potentiometer (R2).
ACCELERATION
POTENTIOMETER R2 SETTING
TIME
(number of turns CW
(milliseconds)
from fully CCW position)
22
0
60
1/2
100
1
200
2
300
3
400
4
500
5
600
6
800
8
1000
10
1250
12-1/2
1500
15
1750
17-1/2
2000
20
2200
22
The acceleration times are essentially unaffected by any potenti-
ometer or switch settings.
6.6 DECELERATION
Deceleration time from high speed to base speed, with the Decel-
eration potentiometer (R1) fully counterclockwise is 50 milliseconds.
Range is from 50 milliseconds to 2 seconds.
Measure deceleration with an oscilloscope connected to HI
SPEED POT 1 and SIGNAL COMMON.
Oscilloscope should trigger
when RUN (J1 pin #6) goes high.
Then make the following settings:
1. Make sure BASE SPEED ONLY is
Open.
2. Connect RUN (J1 pin #6) to SIGNAL COMMON (low).
Maintain low until high speed is achieved.
3. Remove RUN connection to SIGNAL COMMON.
Maintain until measurement is complete
[Oscilloscope will be triggered when RUN is open. This signal must
be open circuited long enough to allow complete deceleration.]
4. Measure deceleration time.
5. Adjust Deceleration potentiometer (R1). Clockwise movement
increases deceleration time.
6. Repeat steps 2 - 5 until desired deceleration is reached.
The following table give approximate settings for the Deceleration
Potentiometer (R1).
DECELERATION
POTENTIOMETER R1 SETTING
TIME
(number of turns CW
(milliseconds)
from fully CCW position)
22
0
60
1/2
100
1
200
2
300
3
400
4
500
5
600
6
800
8
1000
10
1250
13
1500
15-1/2
1750
18
2000
20
6.7 REDUCED CURRENT
6.7.1 Reduced Current for 230-TOH
It is possible to configure the 230-TOH drive to deliver less than
2.0 amps to the motor. To do this, a jumper or a resistor is connected
between the LOGIC COMMON (J3 pin #3) and REDUCE CURRENT
(J3 pin #4) pins on the motor drive module. These pins protrude
through holes in the oscillator circuit board and are shown in Figure
9.0.
Care should be taken to keep the resistor or jumper leads under 2
inches (51mm) long. This signal is not optically isolated. The proper
values for resistors and their associated current are:
CURRENT
RESISTOR
(amperes)
(ohms)
1.00
0 (jumper)
1.25
2.49 k, 1/4 watt, 1%
1.50
7.50 k, 1/4 watt, 1%
1.75
23.7 k, 1/4 watt, 1%
2.0
open
6.7.2 Reduced Current for 430-TOH
The 430-TOH drive can operate at reduced current in the same
fashion. The proper resistor values and their associated currents
are:
CURRENT
RESISTOR
(amperes)
(ohms)
1.5
0 (jumper)
2.0
1.78k, 1/4 watt, 1%
2.5
5.62k, 1/4 watt, 1%
3.0
16.2k, 1/4 watt, 1%
3.5
open
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