Engineer Training

XL1200 Pneumatics

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Engineer Training

XL1200 Pneumatics

Working Concept Overview:

The Pneumatic System is comprised of:

Y Pistons

Z Pistons

Ink Purge

Pneumatic Panel

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XL1200 Pneumatics

Y Pressure Roller Pistons

The pistons are controlled by the Pneumatic Panel, and they work with an air pressure of 2.5 bar.

The pressure roller has a total of 3-5 pistons depending on the machine.

The speed of these pistons can be regulated.

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XL1200 Pneumatics

Z Shaft

This shaft is controlled by two pistons, which hold the Z rubber Roller.

The Pressure used is 4.5 Bar.

The speed of those pistons can also be controlled, and for safety reasons it should be very slow.

The Off position in this Axes, is when the pistons are UP. If there is a loss of pressure, the roller has two springs which lift or maintain the roller in the upward position.

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XL1200 Pneumatics

Ink Purge

We use air pressure of 0.8 bar to clean the heads

For this we have two air valves for each color.

Each air valve controls 4 heads, and the valve splits to two outputs, one for each partition of the secondary tank.

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XL1200 Pneumatics

Pneumatic Panel

This Panel controls the Z pistons and Y pistons. It also regulates and displays the air pressure for the pistons as well as for the Ink Purge.

The Panel is also included in the safety system. If the Emergency Stop button is pressed, all air supply to the system will be cut off.

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XL1200 Pneumatics

Pneumatic Panel

The Panel is comprised of

the following:

On / Off Buttons:

3 Valves

2 Filters

2 timers

3 Gauges

Pressure Regulators

Main switch

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XL1200 Pneumatics

ON / OFF Buttons

These 4 buttons control the Z and Y pistons in the following way.

On Y, when the Green Button is pressed, the pressure roller goes UP. The green button lights.

On Z, when The Green Button is pressed, the rubber shaft goes down. The green button lights.

Pressing either Red Button, turns OFF each Shaft; Y goes down, Z goes UP. Red Button Lights.

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XL1200 Pneumatics

TIMERS

There are 2 safety timers which control the delay of each shaft before it starts to move. After pressing any button, an alarm goes off, while the delay is present.

You can adjust this delay in the timers, by rotating the little dial in them, and setting the desired number. The units are in seconds, but this can be changed.

The timer has 4 dip switches. The first 2, define the time range and the last 2 the mode. The Correct setting, should be 1 up, and the rest down, so that the range is in seconds.

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XL1200 Pneumatics

REGULATORS AND FILTERS

There are 2 water filters in the panel. The first one on the bottom, filters the whole system from water, and the second one is for Ink purge, because it is more sensitive.

There are 3 regulators, one for each function, Z, Y, and Ink Purge. Adjust

the pressure by Turning the black top cap.

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XL1200 Pneumatics

Gauges and Main Air Valve

There are three gauges, one for each section. They display the current pressure applied:

The first for Ink Purge (0.8bar)

Second Y pistons (2.5 Bar)

Third Z pistons (4.5 Bar)

The main Ink Valve, opens and closes the entrance of Air to the whole system.

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XL1200 Pneumatics

VALVES

There are 3 electronic valves in the panel. One is for the safety system, which cuts all air entrance if emergency is pressed. And the other two are for the Y and Z piston control.

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XL1200 Pneumatics

General Diagram.

Ink Purge0.8 Bar

Y Pistons2.5 Bar

Z Pistons4.5 Bar

Ink PurgeAir

Regulator

Y AirRegulator

Z AirRegulator

MainValve

Safety Valve

Z Valve

Z Pistons

Y Valve

Y Pistons

Precision Water Trap

To Head CarriagePurge Valves

WaterTrap

DC

R1 R2T1

Buzzer

24V

START

STOP