Carotron DIV280-000 Manuale utente

Divider

Module

Instruction Manual

DIV280-000

Table of Contents

1. General Description....................................................................................................... 3

2. Specifications ................................................................................................................ 4

2.1 Electrical ........................................................................................................... 4

2.2 Physical ............................................................................................................ 4

3. Installation ..................................................................................................................... 5

3.1 Wiring Guidelines ............................................................................................. 5

3.2 Signal Connections........................................................................................... 5

4. Description of Features & Adjustments ......................................................................... 6

5. Adjustment Procedure ................................................................................................... 7

5.1 Velocity Mode Winder....................................................................................... 8

5.2 Torque Mode Takeup/Letoff ........................................................................... 11

6. Prints ........................................................................................................................... 14

C13814 DIV280-000 Block Diagram..................................................................... 14

C13813 DIV280-000 Assembly ............................................................................15

C13815 DIV280-000 General Connections .......................................................... 16

7. Standard Terms & Conditions of Sale ......................................................................... 17

List of Figures

Figure 1: Winder Speed vs Winder Diameter (10:1 Build Ratio) ....................................... 3

Figure 2: Physical Dimensions .......................................................................................... 4

Figure 3: General Connections.......................................................................................... 5

Figure 4: Diameter Signal Examples ................................................................................. 6

Figure 5: Velocity Mode Winder Example 1 ...................................................................... 8

Figure 6: Velocity Mode Winder Example 2 ...................................................................... 8

Figure 7: Torque Mode Drive Example............................................................................11

Figure 8: Torque Mode Brake Example........................................................................... 11

General Description

A problem encountered in center driven takeup and letoff velocity mode applications is

the nonlinear relationship between the diameter of a roll and the motor speed required to

maintain constant surface speed of the roll during diameter increase or decrease. A plot

of this relationship shows a hyperbolic curve.

Figure 1: Winder Speed vs Winder Diameter (10:1 Build Ratio)

When the line speed and roll diameter values are known, the required roll speed can be

calculated (i.e. Roll Speed = Line Speed/Roll Diameter). The material surface speed on a

takeup or letoff would be held constant during roll diameter changes.

Furthermore, in torque applications, the torque required to maintain constant tension is

proportional to roll diameter. When the line speed and roll rotational speed values are

known, the required torque can be calculated (i.e. Roll Diameter = Line Speed/Roll

Speed). The tension applied to the material on a takeup or letoff would be held constant

during roll diameter changes.

Model DIV280-000 is designed for the above industrial applications where the division of

DC voltage signals is required to produce the non-linear plot. The module has two

voltage inputs (X & Y). Each voltage input has an associated Teach terminal that can be

used to calibrate the minimum and maximum input levels. The output is based on the

following formula:

BuildRatioInputY

InputX

Output ×

Multiturn GAIN, BIAS, BUILD RATIO, and Y TRIM RANGE potentiometers are used to

calibrate the DIV280-000 module. An internal jumper allows selection of a voltage or

current output. Onboard EEPROM is used to backup and retain the calibration values

during a power loss.

Specifications

2.1 Electrical

D.C. Power Input

•24 VDC ±10%, 60mA max,

internally fused

+10VDC Reference Output

•10mA max

X & Y Inputs

•Range: 0-10VDC

•Input Impedance: 10

Ω

Potentiometers

•Turns: 15

Temperature Range

•0-55º C

Signal Output

•Voltage Output

Selected by position V on J2. This

circuit allows the output to source a

voltage level of up to +10 VDC into a

minimum resistance of 600 Ohms. If

resistance is too low, output linearity

may be affected.

•Current Output

Selected by position I on J2. This

circuit allows the output to source a

regulated current up to 20mA into a

maximum resistance of 500 Ohms.

Using the BIAS pot, the output can

source a 4 to 20mA signal.

2.2 Physical

Figure 2: Physical Dimensions

Installation

3.1 Wiring Guidelines

To prevent electrical interference and to minimize start-up problems, adhere to the

following guidelines:

Use fully insulated and shielded cable for all signal wiring. The shield should be

connected to circuit common at one end only. The other end of the shield should be

clipped and insulated to prevent the possibility of accidental grounding.

Signal level wiring such as listed above should be routed separately from high level

power wiring (such as the A.C. line, motor, operator control, and relay control wiring).

When these two types of wire must cross, they should cross at right angles to each

other.

Any relay, contactor, starter, solenoid or other electro-mechanical device located in close

proximity to or on the same line supply as the DIV280-000 should have a transient

suppression device such as an MOV or R-C snubber connected in parallel with its coil.

The suppressor should have short leads and be connected as close to the coil as

possible.

3.2 Signal Connections

Figure 3: General Connections

Description of Features & Adjustments

JUMPER J2

Selects the Output Mode between Voltage or Current. Position V on J2 selects the

Voltage Mode and the output is sourced from terminals 7 & 8. Position I on J2 selects

the Current Mode and the output is sourced on terminals 7 & 9.

BUILD RATIO Potentiometer

The BUILD RATIO is the ratio of maximum diameter to minimum diameter. The BUILD

RATIO potentiometer has a range of 1 to 20. Clockwise rotation increases the ratio.

INPUT Y TRIM RANGE Potentiometer

In the velocity mode application (where Roll Speed is calculated by dividing Line Speed

by Roll Diameter), a signal proportional to roll diameter (or radius) is required. When the

minimum and maximum signal levels are taught (see the Teach function), the DIV280-

000 module assumes the Zero Diameter and Max Diameter levels are used (points A

and C). Note that point A is the ‘zero’ diameter level which would correspond to the

center axis of the roll. With this type of signal, the normal operating range of signal

would be between points B and C (since the diameter should never fall below core).

During the teach process, the Zero Diameter point (center axis of roll) must be measured

or simulated. Often, it is easier to calibrate the diameter signal by teaching the Core and

Max Diameter levels. (points B to C). However, this introduces an error because the

module assumes the Zero Diameter point has been taught. The Y TRIM RANGE

potentiometer can be used to re-scale the signal so that the minimum input is treated as

the Core level instead of the Zero level.

Figure 4: Diameter Signal Examples

GAIN Potentiometer

Sets the maximum output level at terminal 7.

BIAS Potentiometer

Sets the minimum output level at terminal 7.

TEACH INPUTS

The INPUT X and INPUT Y terminals can accept a nominal 0 to 10VDC input signal.

Each input has an associated TEACH terminal that can be used to calibrate that input to

the actual minimum and maximum signal levels. Thus, an input signal with a range less

than 10V (1V to 9V for example) can be calibrated to reflect a 0 to 100% input. In

addition, the order in which the voltage levels are taught can be used to invert the slope

of the input. Thus the 1-9V input can reflect a 0-100% or a 100-0% signal.

Apply the signal level to the input terminal that corresponds to 0%. Teach this level by

connecting the associated Teach input to circuit common (terminal 11). Next, apply to

the input terminal the signal level that corresponds to 100%. Teach this level by

disconnecting the Teach input from circuit common. If an error is made during the teach

process, simply repeat the procedure.

Adjustment Procedure

WARNING! DURING CALIBRATION, THE DIV280-000 MODULE WILL

PRODUCE AN OUTPUT. PLEASE DISCONNECT ANY EQUIPMENT

FROM THE MODULE THAT COULD BE DAMAGED OR CAUSE INJURY

DURING THIS PROCESS.

Proceed to Section 5.1 for velocity mode takeups and to Section 5.2 for torque mode

takeups or letoffs.

5.1 Velocity Mode Winder

The DIV280-000 can be used as a velocity mode winder control. In this application, the

winder controls/sets the material speed. As the diameter increases, the center driven

winder speed must be reduced in order to maintain a constant material speed. The

DIV280-000 module calculates the winder speed signal by dividing the line speed by

diameter. The diameter can be measured by using electronic sensors (such as a sonic

or a laser, Figure 5) or by a simple rider arm and potentiometer (Figure 6).

Figure 5: Velocity Mode Winder Example 1

Figure 6: Velocity Mode Winder Example

Step 1: Select Output Type

1. Select the type of output desired using Jumper J2. If a Voltage output is desired,

select V on J2 and use output terminals 7 (OUTPUT) and 8 (VOLTAGE

RETURN). If a Current output is desired, select I on J2 and use output terminals 7

(OUTPUT) and 9 (CURRENT RETURN).

Step 2: Connections

1. Make connections per drawing C13815 on page 16. Initially, there should be no

connection on the Teach inputs on terminals 10 & 12.

Step 3: Initial Settings

1. Initially set the potentiometers as follows:

GAIN........................ fully counter-clockwise (CCW)

BIAS ........................ fully counter-clockwise (CCW)

BUILD RATIO .......... fully counter-clockwise (CCW)

Y TRIM RANGE....... fully counter-clockwise (CCW)

2. Remove all material from the winder and load the smallest empty core that will be

used.

3. Apply power to the module.

Step 4: Teach Inputs

1. Turn the Line Speed potentiometer fully counter-clockwise to apply the 0% Line

Speed signal level to Input X on terminal 4. Connect the Teach X input (terminal

10) to circuit common (terminal 11). Turn the Line Speed potentiometer fully

clockwise to apply the 100% Line Speed signal level to Input X. Disconnect the

Teach X input from circuit common.

2. Apply either the Zero Diameter or Core Diameter signal level to Input Y on

terminal 5. Connect the Teach Y input (terminal 12) to circuit common (terminal

11). Apply the Max Diameter signal level to Input Y. Disconnect the Teach Y

input from circuit common.

Step 5: Set Minimum and Maximum Output

1. With GAIN fully CCW, adjust the BIAS potentiometer for minimum output on

terminal 7. For a voltage output, the minimum output is typically 0V. For a current

output, the minimum output is typically either 0mA or 4mA. (Note that the X & Y

input levels have no affect on the output at this time since the GAIN is fully CCW.)

2. Load an empty core. Set external line speed potentiometer to maximum, and start

the winder drive. With the BUILD RATIO fully CCW, adjust the GAIN

potentiometer for the maximum desired output on terminal 7. Typical output levels

are 10V or 20mA. A hand tachometer can be used to measure the surface speed

of the winder (i.e. Ft/min[fpm], Ft/sec[fps], m/min[mpm], etc…). Adjust the GAIN

potentiometer and/or the drive’s speed scaling settings to obtain the maximum

desired surface speed of the empty core. Note the surface speed as this level will

be required later.

3. Ensure the external line speed potentiometer has control of the speed. Verify

speeds with the external line speed potentiometer at minimum, mid-position, and

maximum positions. Stop the drive when complete. If speeds are not correct, re-

teach the Line Speed signal.

Step 6: Adjust Build Ratio

1. Determine the BUILD RATIO by dividing the maximum roll diameter by the

minimum roll (empty core) diameter. If multiple sizes are used, calculate with the

smallest core and the largest maximum diameter. For example, a maximum

diameter of 32” and a core diameter of 4” will yield a Build Ratio of 8.

2. Determine the Max Diameter Core Speed by dividing the surface speed measured

in 5.2 above by the BUILD RATIO. For example, with a maximum speed of

100fpm and a BUILD RATIO of 8, the Max Diameter Core Speed would be

12.5fpm (100fpm/8=12.5fpm)

3. Load a maximum diameter roll so that it can be rotated without feeding material.

Rotate the BUILD RATIO potentiometer fully clockwise (approx 20 turns) and the

external speed potentiometer to minimum. Start the winder drive and slowly rotate

the external line speed potentiometer to maximum. Slowly adjust the BUILD

RATIO potentiometer counter clockwise until the surface speed of the material

matches the maximum surface speed measured in 5.2. Alternatively, if a portion

of the core is not obstructed by the material, its surface speed should be equal the

Max Diameter Core Speed value calculated in 6.2. Stop the machine once

complete.

Step 7: Adjust Y TRIM RANGE

1. If the diameter signal on Input Y was calibrated using the Zero Diameter and Max

Diameter levels, then no adjustment is required on the Y TRIM RANGE

potentiometer (leave fully CCW). Calibration is now complete. Otherwise,

continue below. (Note: The majority of users will need to continue with the

following step.)

2. Load an empty core and set external line speed potentiometer to minimum.

Rotate the Y TRIM RANGE potentiometer fully clockwise (approx 20 turns). Start

the winder and slowly increase the external line speed potentiometer to maximum.

Rotate the Y TRIM RANGE potentiometer counter-clockwise until the winder

surface speed equals the maximum surface speed level measured in Step 5.2

above.

Step 8: Final Settings

1. The external Line Speed potentiometer can be used to set the desired material

speed. As the diameter builds, the DIV280-000 will decrease the velocity signal to

the winder to maintain a constant material speed.

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