Outer diameter control unit DAC series

The system receives signals from dimensional measuring instruments such as outer diameter measuring devices and outputs feedback signals to the extruder and take-up machine to control the outer diameter to a constant level.

Product Lineup

Automatic startup function included / DAC+88

Step-controlled type / DAC-93

PI-controlled type / DAC-96

Automatic startup function with outer diameter control unit DAC+88

The ratio of the extrusion screw's rotational speed to its take-up speed, which is necessary to maintain a constant outer diameter, is automatically learned with each subsequent operation.

Reducing startup losses simplifies the operation process.

Features of the outer diameter control unit with automatic startup function

• Because the control parameters are calculated automatically, adjustments are not required while the machine is running on the line.
• External contact input terminals allow for manual, automatic, start-up, and deceleration operations.
• The RS232C interface allows all operations to be controlled from an external computer.

Learning process model

Automatic control allows for some degree of outer diameter control even before learning, but the outer diameter becomes more stable after learning.

Line characteristics are learned for each product and stored in memory for up to 100 different combinations, eliminating the need to reconfigure data when replacing products.

specification

Model Name DAC+88 Control style Parameter setting control Young startup function ○ Connectable outer diameter measuring instrument Only our company's products Signal input section Input type Extrusion/Retraction Speed ​​​​Voltage Input vegetation ○ Voltage range Extrusion input: DC 0 to +10V
Take-up input: DC 0 to +10V Input Resistor 200kΩ Gain selection × Signal output section Output type Extrusion/Take Speed ​​​​Voltage Output Output method Absolute value control vegetation ○ Voltage range Each output DC 0 to +10V maximum current Each output DC 0 to +10mA Output resistor Each output 10Ω or less Lock voltage configurable ... item System data: 11 types / Work data: 12 types Programming Function ○ Drive button Manual/Auto/Startup/Deceleration External operation input ○ Measuring pulse signal Unnecessary Current display The LCD displays the set values ​​and operating status. DL communication RS232C power supply AC 90-240V 50/60Hz (Flexible Power Supply) Power consumption 10VA or less

Step-controlled outer diameter control unit DAC-93

Deviation information is input from the laser outer diameter measuring instrument, and A-phase and B-phase pulses are input from the rotary encoder.

Feedback control is possible by setting the distance between the extruder and the outer diameter measuring instrument, and the pulse rate of the rotary encoder.

Features of a Step-Controlled Outer Diameter Control Unit

• This is ideal for sites where the distance between the extruder and the outer diameter measuring instrument is long.
• Step control cancels out the time delay caused by the distance difference between the extruder and the outer diameter measurement point.
• Automatic/manual control can be switched using switches, contacts, or RS232C and RS485 commands.

Basic operation via automatic/manual/reset switching.

It is possible to hold the control output voltage when switching from automatic control to manual control.

Furthermore, when switching to manual control, a time constant can be incorporated when short-circuiting the control output voltage, thus preventing sudden loads from being placed on the extruder or take-up machine.

Operating timing

In automatic control mode, the system typically monitors whether the deviation voltage input exceeds the alarm level. If the deviation voltage input exceeds the alarm level, a step voltage (P × deviation input voltage) is added to the control voltage output.

After the DEAD TIME for adding the step voltage has elapsed, monitoring of the deviation voltage input will resume.

specification

Model Name DAC-93 Control style Delayed time step control Young startup function × Connectable outer diameter measuring instrument Not specified (analog deviation output required) Signal input section Input type Outer diameter deviation input vegetation ○ Voltage range External input: DC ±10V
Speed ​​input: DC 0 to +10V Input Resistor 200kΩ Gain selection 10µm to 10mm/V (selectable) Signal output section Output type Control output Output method Correction value control vegetation ○ Voltage range DC±10V maximum current DC ±20mA Output resistor 6Ω or less Lock voltage configurable ... item Alarm level, P Programming Function × Drive button Manual / Manual / Reset External operation input ○ Measuring pulse signal Required (speed typing is acceptable) Current display The control output is displayed using an LED bar graph. DL communication RS232C, RS485 power supply AC 90-240V 50/60Hz (Flexible Power Supply) Power consumption 8VA or less

PI-controlled outer diameter control unit DAC-96

Deviation information is input from the laser outer diameter measuring instrument, and line speed voltage is input from the manufacturing line.

Furthermore, feedback control is possible by setting appropriate P (proportional) and I (integral) values.

Features of PI-controlled outer diameter control unit

• This is ideal for sites where the distance between the extruder and the outer diameter measuring instrument is short.
• PI control enables real-time feedback control.
• Automatic/manual control can be switched using switches, contacts, or RS232C and RS485 commands.

Basic operation via automatic/manual/reset switching.

It is possible to hold the control output voltage when switching from automatic control to manual control.

Furthermore, when switching to manual control, a time constant can be incorporated when short-circuiting the control output voltage, thus preventing sudden loads from being placed on the extruder or take-up machine.

specification

Model Name DAC-96 CADF
DXF
PDF Control style P/I/SPEED control Young startup function × Connectable outer diameter measuring instrument Not specified (analog deviation output required) Signal input section Input type Outer diameter deviation / Speed ​​​​voltage input vegetation ○ Voltage range External input: DC ±10V
Speed ​​input: DC 0 to +10V Input Resistor 200kΩ Gain selection × Signal output section Output type Control output Output method Correction value control vegetation ○ Voltage range DC±10V maximum current DC ±20mA Output resistor 6Ω or less Lock voltage configurable ... item P, I Programming Function × Drive button Manual / Manual / Reset External operation input ○ Measuring pulse signal Unnecessary Current display The control output is displayed using an LED bar graph. DL communication RS232C, RS485 (standard equipment)
, CC-Link, Ethernet/IP (optional) power supply AC 90-240V 50/60Hz (Flexible Power Supply) Power consumption 8VA or less