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TECH NICAL RE FERE NCE CALIBR ATIONS 1.54 High Throughput Conveyor Manual Chapter Issue 2 May 02 CALIBRATIONS Board T ranspor t B elt S peed (Auxiliary Rails) The board tr ansport belt spee ds of the two au xiliary rail …

TECHNICAL REFERENCE

ADJUSTMENTS & SETTINGS

Chapter Issue 2 May 02 High Throughput Conveyor Manual 1.53

28. Refit the external pneumatic connection to the external services panel.

29. Power up and initialize the machine. If required, remove the head prop and

lower the head.

30. In Set Prefs menu, ensure the Transport Mode option is selected to Left to

Right.

TECHNICAL REFERENCE

CALIBRATIONS

1.54 High Throughput Conveyor Manual Chapter Issue 2 May 02

CALIBRATIONS

Board Transport Belt Speed (Auxiliary Rails)

The board transport belt speeds of the two auxiliary rails are controlled by the

M27 and are not adjustable. The belt speed can be measured using a

tachometer on the input or output pulley, check the speed to be approximately

500mm/sec (30m/sec).

Board Transport Belt Speed (Print Station Rail)

WARNING

LETHAL VOLTAGE. DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT.

ENSURE ALL ELECTRONIC COVERS AND MAIN MACHINE COVERS ARE

FITTED BEFORE OPERATING THIS EQUIPMENT.

The front and rear board transport belts, of the print station rail, are driven

independently by two variable speed motors. Inevitably one motor drives faster

than the other motor. It is necessary to calibrate these motors so that they drive

at the same speed in either direction. Therefore, the faster motor must be

calibrated to match the slower motors speed.

The speed of both the belt motors is controlled by a MultiMove card situated in

the machine control enclosure and utilizes Pulse Width Modulation (PWM).

This is achieved by controlling the period of the ON control pulse provided by

the MultiMove control card. The pulse repetition rate is fixed at 125Hz.

The belt speed is measured using a tachometer on the underside of the input

or output pulley and adjusted by using the Belt Speed Calibration Page in the

machine diagnostics.

NOTE

For belt speed calibration set up see Calibration Procedure of this section. For

detailed information on access and use of the diagnostics module refer to the

Diagnostics chapter of the machine’s User manual.

Motor speed software parameters is listed in the following table:

Calibration

Procedure

1. In Diagnostics, select Rail System.

2. Select Belt Speed Calibration, the following window is displayed:

3. Using a tachometer fitted with the surface speed test wheel, positioned on

the input or output pulley of the print station front belt motor, measure the

Name Maximum Minimum Default Increment

Front L to R Speed 64000 0 32000 1

Rear L to R Speed 64000 0 32000 1

Front R to L Speed 64000 0 32000 1

Rear R to L Speed 64000 0 32000 1

Belt Speed Calibration

50000

63999

FRONT L TO R SPEED

FRONT R TO L SPEED

REAR L TO R SPEED

REAR R TO L SPEED

TECHNICAL REFERENCE

CALIBRATIONS

Chapter Issue 2 May 02 High Throughput Conveyor Manual 1.55

speed of the motor left to right. Adjust the motor speed using Incr./Decr. to

achieve a speed of 59 - 61 metres/min.

4. Repeat Step 3 for the front right to left motor speed.

5. Repeat Steps 3 and 4 for the rear belt motor.

6. Select Save, the speed of the front and rear belts motors in both directions

are now saved in the machine configuration file.

7. Select Exit.

8. Select Exit.

9. Select Exit.

NOTE

If boards do not butt against the camera board stop during the print sequence,

use the Run on Delay parameter available in the Edit Data menu. If the

condition persists, a reduction in the speed of the transport belt motors maybe

appropriate.