Infinity EX Print Carriage Module.pdf - 第9页

INFINITY EX PRINT CARRIAGE MODULE DRIV ES AND SENS ORS Chapter Issu e 2 Aug 02 Technical Reference Manual 9.9 T emperature and Humidity Sensor The temperature and humidity sensor option is utilized during the application…

INFINITY

PRINT CARRIAGE MODULE

DRIVES AND SENSORS

9.8 Technical Reference Manual Chapter Issue 2 Aug 02

DRIVES AND SENSORS

Motors

Sensors

Figure 9-5 Drives and Sensors

Name Type Control Card Functional Description

Print Carriage

Motor

Servo Motor with

Gearbox (50:1) and

Encoder

Machine Controller

Servo Drive Card

Drives the print carriage

along the Y axis.

Provides feedback of the

print carriage position via an

integral encoder

Name Type Control Card Functional Description

Print Carriage Home Hall Effect NextMove DIG IN 6 Determines the home posi-

tion of the print carriage

Temperature &

Humidity (Optional)

Temp - NTC

resistive

Hum - Capac-

tive

NextMove

Temp - ADC2

0V - Analog gnd

Hum - ADC4

+12V - USR

Produces temperature and

Humidity information from

the printhead area of the

machine

Temperature and

Humidity Sensor

Print Carriage Motor Print Carriage

Home Sensor

INFINITY

PRINT CARRIAGE MODULE

DRIVES AND SENSORS

Chapter Issue 2 Aug 02 Technical Reference Manual 9.9

Temperature and

Humidity Sensor

The temperature and humidity sensor option is utilized during the applications

process of printing. In order to achieve maximum print quality during the

printing process, a continuous temperature and humidity monitor of the machine

printhead area is required.

The sensor provides the operator with accurate real time information of the

internal temperature and humidity levels of the machine. This is displayed on

the machine monitor Printer - Status window.

Figure 9-6 Temperature and Humidity Sensor

The sensor is a 4 wire transmitter which measures relative humidity, utilizing a

capacitive sensor, and temperature with an NTC resistive type sensor. Essen-

tially the sensor behaves like a variable source of current or voltage that is

adjusted dependent upon the temperature and humidity conditions.

Two linearized output signals are read by the machine PC NextMove card

(Temperature - ADC2 / Humidity - ADC4). Real time information is displayed

on the machine monitor Status Window.

The parameters of the temperature and humidity sensor is:

NOTE

Information on the application process of printing is detailed in the Print Quality

chapter of this manual.

Range Time Constant Accuracy

Temperature 5°C - 45°C 180 secs (still air) ±0.25°C at 25°C

±0.5°C from 0° - 50°C

Humidity 10%rH - 90%rH 15 secs (still air) 10 - 90%rH

±3% at 25°C

±6% from 0° - 50°C

INFINITY

PRINT CARRIAGE MODULE

SEQUENCES

9.10 Technical Reference Manual Chapter Issue 2 Aug 02

SEQUENCES

Homing Sequence The print carriage only carries out a homing sequence during initialization,

which can be from power-up or exiting diagnostics. The homing sequence is as

follows:

1. The print carriage moves towards the back of the machine.

2. The print carriage stops when the home sensor detects the vane.

3. The motor reverses, driving the print carriage towards the front of the

machine.

4. The print carriage stops as the vane just clears the home sensor.

NOTE

Although the servo motor is fitted with an encoder the index pulse is not used in

the homing sequence. To adjust the home position the sensor or vane must

simply be moved the amount needed to correct the error

Figure 9-7 Print Carriage Homing Sequence

Home Position

Fwd

Servo

Motor

Home

Sensor

12V

Stopped

Rev

Vane leaves sensor

Vane enters sensor