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参数资料
| 型号： | SSCUB-200/A |
| 厂商： | Red Lion Controls |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | MODULE DIS COUNTER SSCUB200 DATA |
| 标准包装： | 1 |
| 系列： | SUPER SUB-CUB |
| 计数速率： | 400kHz |
| 数字/字母数： | 6 |
| 输入类型： | 电压 |
| 电源电压： | 2.5 V ~ 6.0 V |
| 显示器类型： | LCD 无背光 |
| 其它名称： | RLC200A SSCUB2 SSCUB200 |
TYPICAL APPLICATIONS
BI-DIRECTIONAL UP/DOWN COUNTING
In this application, a continuous coating of adhesive is applied
to a flexible material, which is then taken up on a large roll.
Whenever a flaw is detected, the entire process is stopped. Since
inertia exists in the system, a certain amount of over-run will
occur. This, in turn, will require reversing the system in order to
bring the flaw back to the adhesive applicator. The SUPER SUB-
CUB can be used to correct the over-run problem by causing the
count to decrease when the process is reversed.
The SUPER SUB-CUB is set up for Bi-Directional UP/DOWN
counting. The Latch pin is used to “freeze” the display when a
defect occurs. Input “A” serves as the count input which is
connected to an open collector output LSC Length Sensor. This
sensor generates 100 pulses/foot of material travel. (With 100
pulses/foot going into the counter, the decimal point is selected so
that the display will indicate feet and hundredths of feet.) Input
“B” serves as the UP/DOWN direction control pin. This pin is
connected to a contact which opens when the system reverses
direction, causing the counter to count “down”. Since the unit is
measuring in hundredths of a foot and very large rolls are used, it
is possible that the count could exceed the display capability of six
(6) digits. To avoid this problem, a button is connected which,
when pressed, causes the unit to display the six (6) most
significant digits of the internal 8-digit counter. In addition, the
decimal point is removed when the button is held down.
The operation of the system is described as follows.
Whenever a flaw is detected, the Latch pin will be pulled high,
“freezing” the display at the reading where the flaw occurred. At
the same time, the machine is stopped and the applicator is turned
off. Due to inertia within the system, internal counts increase
until the system comes to a complete stop. The operator then
notes the reading on the counter display, releases the latch pin
(the display then reveals the total length), and reverses the
machine until the displayed value matches the noted value.
When this match occurs, the flawed area is beneath the applicator
area where it can be corrected.
QUADRATURE TIMES FOUR
In this application, it is necessary to keep track of the exact
position of a work table. The work table can be moved left or
right and is driven by a lead screw. Because the two requirements
of critical positioning and direction reversal must be satisfied, the
Quadrature Mode of the SUPER SUB-CUB is selected. An
RPGB with 10 PPR, quadrature, current sinking output is
coupled to the screw shaft. The screw shaft moves the table one
inch for every 25 revolutions which yields 250 pulses/inch of
travel. But in this application, a higher degree of resolution is
needed without using a higher resolution sensor. Therefore, the
Times Four Quadrature Mode is selected which results in 1000
pulses per inch of travel or 0.001" increments of resolution.
The drawing illustrates connections for the inputs and mode
select lines, including buffering of the two inputs. (The diodes are
used to block the 12 VDC signal of the RPG from the SUPER
SUB-CUB inputs.) The decimal point is placed in the third
position so the reading is in inches and one-thousandths of inches.
With the set-up shown, the operator can place the table at any
reference point desired, reset the SUPER SUB-CUB and make
all measurements with regard to this reference. Movement to the
left of this reference will provide a negative reading, while
movement to the right of this reference will provide a positive
numerical reading. Switching the count and quadrature inputs
will cause movement left to be positive (+) while movement to
the right will be negative (-) . As shown in the drawing, the work
table is 53.475" to the left of the reference point.
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