00195376-05_SM_D1_D1i_D2_D2i_EN - 第272页

Settings Modular PCB Conveyor System 6.7.11 Lifting Table Functions 272 Service Manual SIPLACE D1/D1i/D2/D2i 6.7.11 6 . 7 . 1 1 L if t in g T a b le F u n c t io n s Lifting Table Functions Lifting table up function Requ…

Settings

6.7.8 Light Barrier Functions in Input, Intermediate and Output Conveyors Modular PCB Conveyor System

Service Manual SIPLACE D1/D1i/D2/D2i 271

The light barrier in the placement area is used to recognize the board and then start the braking proce-

dure (travel profile) via the conveyor control software. The software automatically "teaches" the first

board how to move in slow approach mode. Once the travel profile for braking the PCB has begun (on

time), the PCB will be reliably stopped at the laser light barrier, after a maximum of 100ms.

6.7.8

6.7.8 Light Barrier Functions in Input, Intermediate and Output Conveyors

Light Barrier Functions in Input, Intermediate and Output Conveyors

▪ Recognizing and stopping the PCB boards.

▪ Monitoring the boards in the input conveyor i.e.

If a board is recognized in the input conveyor, it will appear on the operating interface and the ma-

chine will lock the conveyor interface to the previous station. When using boards with outbreaks, the

board may stop although the signal of the light barrier is disabled and the interface to the previous

station is opened again. Then the next PCB would move into the input conveyer with the PCB still

lying in the input conveyer. The board monitoring function moves the board backwards and then

transports it forwards again, until the light barrier switches.

6.7.9

6.7.9 Setting the Clamping Actuator

Setting the Clamping Actuator

6.7.10

6.7.10 PCB Clamping Check

PCB Clamping Check

Function description:

▪ The PCB moves into the placement area, it is recognized by the light barrier, stops at the laser and

the lifting table moves up.

▪ Check PCB clamping: The conveyor motor in the placement area will restart. If the PCB is clamped

correctly the motor current will rise up and exceed a defined threshold value. Once the board has

been correctly clamped into place, the placement process will begin.

▪ If this threshold is not reached, the system assumes that the board is on its way to the intermediate

or output conveyor and has therefore not been correctly clamped into place.

▪ The station computer will issue the message "PCB not correctly clamped PA1 (PA2)". The process

can be repeated by pressing the "start button".

▪ The lifting table will move downwards, the board will be transported back and the stopper position

will be approached again.

Legend

1. Actuator

2. Top edge of conveyor belt

► Set the distance between the actuator and the top

edge of the conveyor belt to 94 mm.

NOTICE! The distance between the clamping

actuator (lifting table) and the top edge of the belt must

be checked at all four contact points.

NOTICE

To check whether a PCB is clamped correctly, a motor current check is performed for the con-

veyor motor in a defined period. The appropriate motor currents are then added together. To

check the function you could put a distance plate under the conveyor side, so that the lifting

table can not move to the upper position.

The check is not performed if the option "Vacuum Tooling" is installed.

Settings

Modular PCB Conveyor System 6.7.11 Lifting Table Functions

272 Service Manual SIPLACE D1/D1i/D2/D2i

6.7.11

6.7.11 Lifting Table Functions

Lifting Table Functions

Lifting table up function

Requirements for detecting that the lifting table is up:

▪ 7-8 increments on the incremental encoder

▪ Check performed by software (see "6.7.10 PCB Clamping Check" [ ➙ 271])

▪ Dynamic response of approx. 500 ms

Lifting table down function

Requirements for detecting that the lifting table is down:

▪ 7-8 increments on the incremental encoder

Lifting table unit

Legend

1. Actuator

2. Lock nut damper

3. Fastening screws for mounting block

4. Damping unit

5. 3/5 way solenoid valve mounted on lifting table drive

cylinder

6. Fork-type light barriers / incremental disk

Settings

6.7.11 Lifting Table Functions Modular PCB Conveyor System

Service Manual SIPLACE D1/D1i/D2/D2i 273

▪ Proximity switch on the lifting table cylinder

▪ Dynamic response of approx. 480 ms

6.7.11.1

6.7.11.1 Setting the Lifting Table Unit [00358684-xx]

Setting the Lifting Table Unit [00358684-xx]

6.7.11.2

6.7.11.2 Adjusting the Lifting Table Speed

Adjusting the Lifting Table Speed

Setting times for the lifting table

Setting the damping unit

The damping unit (1) allows the lifting table to move gen-

tly upwards. When the PCB is clamped, it also prevents

excessive bounce by the PCB.

► Check whether the damping unit is fixed with the lock-

nut (2) in the mounting block and that the plunger (3)

of the damping unit is just touching the actuator (4).

In this default setting, the lifting table should move up

gently.

► If this is not the case, loosen the locknut at the mount-

ing block and turn the damping unit approx. one rota-

tion into the mounting block..

► Start SITEST and move the lifting table up.

► The lifting table should move gently upwards.

The PCB clamping should not engage audibly and

there should be no PCB clamping error message.

► Check the speed of the lifting table and correct where

necessary.

Legend

1. Pneumatic valve

2. Lifting table cylinder with position query down

3. Piston rod

4. Adjustment valve – time characteristic for "lifting table

down"

5. Adjustment valve - time characteristic for "lifting table

up"

NOTICE! Rotating the adjustment valves in a

clockwise direction leads to slower movement.

Adjust the valves on the lifting table cylinder (4 and 5) so

that the following values are achieved: