00197543-01_SM_JTF-S_ JTF-M_en.pdf - 第38页

Service Works Setup and Adjustment Conveyor Unit 2.4.4 Checking Freedom of Movement for long Pawls ( SIPLACE JTF-S) 38 Service Manual SIPLACE JEDEC Tray Feeder 2.4.4 2 . 4 . 4 C h e c k in g F r e e d o m o f M o v e m e…

Service Works

2.4.3 Cleaning and Replacing Short Pawls (SIPLACE JTF-S) Service Base Unit

Service Manual SIPLACE JEDEC Tray Feeder 37

Checking pawl for free movement

Reinstalling the side cover

► Lift up the lower pawl (1) before tight the side cover

screws in order not to pinch the lower pawl with the

notch of the inner side plate as marked above.

Service Works

Setup and Adjustment Conveyor Unit 2.4.4 Checking Freedom of Movement for long Pawls (SIPLACE JTF-S)

38 Service Manual SIPLACE JEDEC Tray Feeder

2.4.4

2.4.4 Checking Freedom of Movement for long Pawls (SIPLACE JTF-S)

Checking Freedom of Movement for long Pawls (SIPLACE JTF-S)

The long pawl should always fall down in place by gravity.

► Push the long pawl (3) to one side and test the upward movement as shown below.

► Push the long pawl (3) to the other side and test the upward movement again.

2.5

2.5 Setup and Adjustment Conveyor Unit

Setup and Adjustment Conveyor Unit

2.5.1

2.5.1 Introduction

Introduction

For a reliable operation it is important to set up the feeder correctly. If the tray moves too quickly, small

or lightweight parts may move out of position. In this section is described how to set up the JEDEC Tray

feeder correctly.

The unit may be set up to operate in three ways. There are differences in the setup procedure, so you

must identify the application for your particular feeder.

2.5.2

2.5.2 Conveyor Speed Settings Overview

Conveyor Speed Settings Overview

Most of the settings on the feeder are not particularly critical. These are set up at the factory. Unless they

are radically changed, they should not cause performance problems. In case you have to reset the feed-

er to the original settings you find these adjustments detailed in this section.

The lift mechanism must handle a wide range of load conditions. The lift mechanism is set up at the fac-

tory to handle a condition where it is holding just one unloaded tray - the lightest possible load. As more

trays are added, the operating speed of the lift mechanism simply slows down a bit.

The more critical settings control the motion of the conveyor. Performance problems may appear if the

type of die is changed. The operating speed of the conveyor is ﬁ xed. The motion of the trays is affected

by the slow-down delays at each end of the travel. For example the feeder has been set up to handle

relatively heavy die, and then begins to process die which are very light, with a large surface area. If the

conveyor mechanisms are set up to move too quickly at the end of travel, the lighter die might tend to lift

or " ﬂ y." At the factory, the feeder is set up to provide the best compromise performance for a wide range

of die types.

There are seven different stages in the process:

Tray moving out:

Checking the long pawls

1. Move the pawl (3) to the up position, release it and

make sure it is falling down all the way to the down

position.

2. Test for freedom of movement in both directions.

Unload application Full trays loaded at bottom of feeder, parts supplied to host machine,

empty trays unloaded at top.

Load application Empty trays loaded at bottom of feeder, parts taken from host machine,

full trays unloaded at top.

Handling application Full trays loaded at bottom of feeder, parts supplied to host machine,

parts returned from host machine, full trays unloaded at top.

Service Works

2.5.2 Conveyor Speed Settings Overview Setup and Adjustment Conveyor Unit

Service Manual SIPLACE JEDEC Tray Feeder 39

1. The out feed pusher moves the tray from the elevator onto the conveyor. The tray must lift up a bit

to reach the level of the conveyor. The pusher speed is controlled by a pneumatic adjustment.

2. The conveyor operates at full speed.

3. As the tray reaches the far end of the conveyor, it goes through a "slow-down" delay. This speed is

controlled by a potentiometer.

4. At the end of travel, the tray is held in place by a clamp.

Tray moving in:

1. The clamp releases and the tray moves back along the conveyor. Again, the conveyor operates at

full speed.

2. As the tray reaches the near end of the conveyor, it goes through another "slow- down" delay. This

speed is also controlled by a potentiometer.

3. The in feed pusher moves the tray from the conveyor back onto the elevator. The pusher speed is

controlled by a pneumatic adjustment.

2.5.2.1

2.5.2.1 When operating in "unload" mode

When operating in "unload" mode

Trays are full going out, empty on return.

Tray moving out:

▪ Out feed pusher - The tray is heavy, because it is holding the die or parts. This means the pusher

must provide some extra "push" to get moving and lift a bit onto the conveyor. Adjust to get a smooth

motion, without "snapping" or moving the tray too suddenly.

▪ Conveyor speed - Operates at full speed.

▪ Slow-down delay - The tray is still loaded at this point, so it should not stop too suddenly. Adjust to

get the fastest cycle speed, while still providing a smooth motion. The die must remain in place on

the tray.

▪ End clamp - Should hold the tray ﬁ rmly.

Tray moving in:

▪ Conveyor speed - Operates at full speed.

▪ Slow-down delay - The tray is empty at this point. Adjust to get the fastest cycle speed.

▪ In feed pusher - The tray is empty. Adjust to get the fastest cycle speed.

2.5.2.2

2.5.2.2 When operating in "load" mode

When operating in "load" mode

Trays are empty going out, full on return.

Tray moving out:

▪ Out feed pusher - The tray is empty. Adjust to get the fastest cycle speed.

▪ Conveyor speed - Operates at full speed.

▪ Slow-down delay - The tray is empty. Adjust to get the fastest cycle speed.

▪ End clamp - Should hold the tray firmly.

Tray moving in:

▪ Conveyor speed - Operates at full speed.

▪ Slow-down delay - The tray is loaded, so it should not stop too suddenly. Adjust to get the fastest

cycle speed, while still providing a smooth motion. The die must remain in place on the tray.

▪ In feed pusher - The tray is loaded. Adjust to get a smooth motion, without "snapping" or moving the

tray too suddenly.

2.5.2.3

2.5.2.3 When operating in "handling" mode

When operating in "handling" mode

Trays are full going out, full on return.

Tray moving out:

▪ Out feed pusher - The tray is heavy, because it is holding the die or parts. This means the pusher

must provide some extra "push" to get moving and lift a bit onto the conveyor. Adjust to get a smooth

motion, without "snapping" or moving the tray too suddenly.

▪ Conveyor speed - Operates at full speed.