A Fluid Control System
It Reduces Annual Electric Power Cost by Up to 61%

What is TAZUNA

A Fluid Control System That Reduces Annual Electric Power Cost by Up to 61%

The use of YTH-EP cuts the annual electric power cost by about 41%. Additional savings of about 20% would be achieved, or a total of 61%, through the use of the TAZUNA™ fluid control system. Trimming the production costs is a way to improve your competitiveness. The saving impact will be greater in a plant with a multiple of machining center operating. Reduction in power consumption enables trimming of CO2 and is an effective measure against global warming.

Comparison of Annual Electric Power Bills

Power Consumption Graph on a Test Operation

  • ■ Operating cycle: total 80 seconds cycle
    Unload (0MPa) 20 sec.
    ⇒ coolant through (1.1 MPa) 20 sec.
    ⇒ Unload (0MPa) 20 sec.
    ⇒ coolant through (1.1 MPa) 20 sec.
  • ■ The energy-saving effect will vary due to the difference in machining pressures and drill diameters.
  • ■ The calculation is based on operation 8 hours/day, 365 days/year, and the electric power billed at ¥20/kWh.

TAZUNA™ Fluid control System (software)

TAZUNA™ is an automatic fluid control system (software) developed by NOP. The system uses a pressure sensor to identify the drill diameter being used by the machining center. It continuously controls the YTH, adjusting the pressure and flow rate instantaneously according to the drill movement. The absence of unneeded pressure means no extra pressure is wasted through the relief valve. The power consumption is greatly reduced while maintaining machining accuracy.

A Sample Configuration

Features of TAZUNA™

■ Additional savings in energy
TAZUNA adjusts the motor within the YTH pump to an optimum speed for the drill diameter in use to achieve significant energy savings and CO2 reduction.
■ Improving machining accuracy
The system is compatible with any drill diameter. Automatic control of the pressure to an optimum value stabilizes the machining accuracy.
■ No initial settings required
An automatic drill identification system is pre-installed. The system is ready for use. No initial setting and other cumbersome programming (for different drills) are required on the machining end.
■ Warning function
Intelligent System alarms user in advance of upcoming Performance deterioration of the pump, so that corrective action can be taken and production-loss can be reduced.
■ Flexibly programmable
The system may be programmed to suit given specifications, allowing the user to customize the system to accomplish a variety of energy-saving control.
■ Compact and low cost
The circuit board is a compact and low-cost single card, complete with required interface.

Automatic Drill Identification System

The system senses the pressure to identify the drill hole diameter. It then selects an optimum machining pressure for the hole diameter by reference to its database. The machining pressure may be fine adjusted to suit different work and cutting fluids. The user’s own database may also be stored independently.

A Flowchart for the Automatic Drill Identification System

  1. In the unload status (the status other than machining in action), the system runs at the designated speed in the chip removal mode.
  2. Following a coolant on input, the speed changes to the drill-identification speed, and identifies the drill hole diameter.
  3. The system controls the rotational speed so as to give an optimum machining pressure and flow rate for the drill-hole diameter as identified. (The system continuously controls the rotational speed to give an optimum machining pressure and flow rate during the machining of work.)
  4. On completion of the drilling, the system returns to the unload status.

A Sample Installation

Control for a constant pressure and flow rate The pressure and flow rate are controlled at a constant value regardless of the fluid temperature and deterioration by feeding back the pressure and flow rate signals.
Servo quantitative control The rotational angle and displacement are sensed for quantitative position control by feeding back the potentiometer signals.
Electro-magnetic proportional control valve An analog output is linked to an electro-magnetic proportional valve for control of the pressure at an optimum value.
The system may be customized to suite the user.

Specifications for the Control Circuit Board

The board is equipped with assorted I/F, enabling control other than the automatic drill identification system.

Item Specifications
General specifications Ambient temperature -10~40℃ (when operating) , -20~60℃ (in storage)
Ambient humidity 10~85% (when operating) , 10~90% (in storage) no condensation
Installed location Indoors (free of corrosive gas or dust)
Input power DC24V ± 10%
Power consumption 10W
External dimensions 140mm (5.5") W x 80mm (3.15") D x 20mm (0.8") H
Input specifications Digital Number of input ports 8ports
Input signal type DC voltage-free contact input
On sink input:NPN open-collector transistor
On source input:PNP open-collector transistor
(Sink input/Source input are selectable at a jumper pin.)
Input operation indicator An LED (red) is lit when input is on.
Analog Number of input ports 2ports
Input range DC0~10V、DC4~20mA
Resolution 16μA (in 1024 steps)
Input operation indicator An LED (red) is lit when analog input is on.
SW Number of input ports 2-position switching: 8 ports (Rotary DIP switch, 8-poles, on-off)
16-position switching: 4 ports (DIP switch, 16-position)
Output specifications Digital Number of transistor output ports 4 ports (with independent common)
Maximum load Maximum load voltage DC 300 V, resistive load, maximum 0.15 A (per output port)
Output operation indicator An LED (red) is lit when output is on.
Maximum response time 85μs
Analog Number of relay output ports 2 ports
Output range DC 4~20mA
Resolution 16μA (in 1024 steps)
CPU specifications Processor DSPIC33FJ128MC710A
Number of bits 16-bit
Memory RAM: 16KB ROM: 128KB
Speed 40MIPS*
Cache 2KB DMA memory
Non-volatile memory EEPROM 8KB
Operation indicator specifications On normal operation: RUN LED (green) is lit.
On error: FAIL LED (red) is lit.

* MIPS is an abbreviation for"Million Instructions Per Second", which is one of the indicators of a computer's processor speed.