电子油压中英说明书.1

Electro-hydraulic converter

電子油壓系統 HE 0135T

3.

Instruction

The electronic-hydraulic converter HE0135T are primarily used in conjunction with web guiding systems either as intermediate guiders or reel guiders as commonly found in the paper, printing, packaging, rubber, textile and other processing industries.

Description

A complete guiding system comprises

- Optoelectronic infra-red sensor FR .. / ultrasound sensor FX.. (1/Fig. 1 ) or Line / Edge sensor FE 10(2/Fig. 1) with command unit RE 3003 (3/Fig. 1)

- Return-to-centre-switch (4/Fig. 1)

- Electronic controller HE0135T (5/Fig. 1)

- HE0135T Electronic-hydraulic converter (6/Fig. 1) with servo valve (7/Fig. 1) and 4/3-way valve (8/Fig. 1)

- Hydraulic cylinder (9/Fig. 1 )

- XAL-B04 Command station (10/Fig. 1)

- Guider assembly (11/Fig. 1)

Fig. 1

The preferred form of edge sensing is by a contact-free photo electronic edge sensor or line/edge sensor (1/Fig. 1 or 2/Fig. 1). The signal emitted is proportional to the web edge and is trans- emitted via the electronic controller HE0135T (5/Fig. 1) together with the command station XAL-B04 (10/Fig. 1) to the servo valve (7/Fig. 1) on the electronic-hydraulic converter HE0135T (6/Fig. 1).

The converts the signal into a proportional oil flow which is fed at pressure to the

hydraulic cylinder (9/Fig. 1) to actuate the displacement guider assembly (11/Fig. 1).

The command station XAL-B04 (10/Fig. 1) has a direct effect on the 4/3-way valve (8/Fig. 1). Allowing the positioning drive to be set manually into any position required or, by bringing in the return-to-center switch (4/Fig. 1) to by returned into the neutral midway position.

The web can be guided either by one edge, or its center-line or by a printed line. Form these basic formats the following preferred guiding systems.

- web guiding by one edge.

- web guiding by printed line.

- web guiding by web center-line.

- automatic return-to-center. (Return of drive unit to a neutral midway position) - manual pushbutton control of drive position.

See next page.

Application

Sensor

The following sensors are compatible:

All the optoelectronic edge sensors in the FR / FX series, line/edge sensor FE 10 with electronic signal output.

Technical details are to be found in the appropriate sensor manual.

Return-to-center switch

The electronic return-to-centre switch has a proportional

output signal and is used to run the drive unit the neutral

midway position, e.g. to facilitate threading-up of the web.

The return-to-centre switch is employed in guiding

systems.

The return-to-centre switch consists of a proximity switch

(Fig. 2), which is accommodated in the electronic

controller HE0135T (5/Fig. 1 ). It consists of an oscillating

circuit found beneath the front face of the proximity switch

which appears as a relatively high resistance when metal

is placed in the electro-magnetic field (14/Fig. 2) The

change in resistance is monitored within the switch. The

companion amplifier converts the current change into a voltage proportional to the resistance. Fig. 2

The return-to-center switch can be installed like Fig.2 or

Fig.3. The return-to-center switch can be attached to any

material surface as only the front end faces are sensitive

to electro-conductive materials influencing the circuit

resistance. The distance between the operator and switch

depends on the thickness and inductance valve of the

metal employed. For asteel operator, 2mm thick 30mm

wide, the distance should be 2~3 mm. If an operator with

different dimensions is used, the optimum distance should

be sought by trial and error. Changes in the distance between operator and switch

should be avoided as these affect the signal output

voltage and thus the guiding accuracy. Fig. 3

Electronic controller HE0135T (Fig. 4)

The electronic controller HE0135T contains all the control electronics for the servo valve and 4/3-way valve. The PCB carries all the terminals required for the control loop components:

- one sensor for edge or line web guiding.

- two sensors for center-line of web guiding.

- return-to-center switch.

- command station: XAL-B04 FOR manual/center/auto mode.

- servo valve.

- 4/3-way valve.

but not for the 3-phase pump motor.

-Switch ACSW1 (Fig. 4)

Switch Sw1 switches the transformer to the appropriate mains voltage 220/240 V (Max.250 V).

-Switch SW1 (Fig. 4)

In the auto mode, switch SW 1 reverse the drive direction of the cylinder (in general this setting is required only once, i.e. during commissioning).

-Switch SW2 (Fig. 4)

In the return-to-center mode, switch SW2 reverse the drive direction of the cylinder (in general this setting is required only once, i.e. during commissioning).

-Fuse: F1,F2,F3,F4, → type 1.6 AT (Fig. 4)

F1 and F2 for main power 220 V at main control board .

F3 and F4 for ±12 V DC at main control board

F1 and F2 for 24 V DC at relay model

-LED.

Main control board

LED1: ±12 V operating voltage for electronic components and sensor

Relay model

LED 1: 24 V control voltage for servo valve, 4/3-way valve, command station

XAL-B04, cooling fan, and relay control.

LED 2: relay K1 for manual, return-to-center, auto mode.

LED 3: relay K2 for manual.

LED 4: relay K3 for auto and manual.

LED 5: relay K4 for auto and return-to-center.

Potentiometer

VR1: potentiometer VR1 determines the sizes of the proportional band and

thereby the system sensitivity. Left stop is minimum sensitivity: Right stop …… 此处隐藏：14519字，全部文档内容请下载后查看。喜欢就下载吧 ……