HS50_advance_level 1_20200522_221201 (1) - 第549页

06/2002 Edition S tudent Gui de HS- 50 Advanced I 20 App endix 22 Nozzle error messages and possib le problems . "2277 RV : intervals open-clos ed vacuu m values too l o w" . The nozzle is deformed or has some …

Student Guide HS-50 Advanced I 06/2002 Edition

20 Appendix

Segment related offsets. To

find out whether offsets are

related to a specific segment

the NC-file at the line-com-

puter has to be consulted.

Here, there is a clear refer-

ence between segment and

placement position. The NC-

file is found in the PCB-data

under the directory "Leiter-

platten".

Problem: Head crash with one segment. The segment offset

of the corresponding segment is not correct anymore.

Solution: Calibrate the RV-camera completely and check the

segment offset values given.

Problem: Dirty encoder scale of the segment.

Problem: Wrong nozzle. Suction is not enough.

Problem: Dirty encoder of the DP-axis. Problem at the DP-

axis; not enough friction, etc.

Sleave extended. Machine

cannot return nozzle into the

nozzle changer. Z-axis gets

stuck and stays down.

The safest method here is to press emergency switch and

switch off the machine. Switching off the machine without

pressing the emergency switch may cause a slight movement

of the gantry thus doing some harm to the z-axis of the re-

volver head!!! Afterwards the z-axis is moved upward by hand.

Then the machine can be switched on again. Now the machine

may be mixed up with the nozzle configuration. See procedure

point 1 above!

Another second method to overcome this problem should only

be used by experienced operators. It is possible to remove the

nozzle by hand and let the z-axis finish its movement. How-

ever the gantry must not have been moved to a different posi-

tion. This could cause a head crash when the start button is

pressed with the z-axis still down and the gantry returning to

its previous position.

The reason for this nozzle changer problem may be a bad cal-

ibration of the nozzle changer in respect of x/y/z-position. The

problem could also be a nozzle which is too tight on the seg-

ment. Check the nozzle f

Machine cannot finish refer-

ence run because of a wrong

nozzle length.

It can be a wrong nozzle or a nozzle which is not correctly

seated on the segment. Here it is not possible to get into the

menu, where nozzle can be rejected or returned. To find out

which nozzle should be on the revolver head, look into the line-

computer under the directory "Leiterplatten", select the corre-

sponding board and have a look at the file.NC. The nozzle

configuration of the head can be seen here. Put on the right

nozzles and the reference run can be completed.

Error Message: Recovery:

06/2002 Edition Student Guide HS-50 Advanced I

20 Appendix

Nozzle error messages and

possible problems.

"2277 RV: intervals open-closed vacuum values too low".

The nozzle is deformed or has some material inside.

The plunger or segment is filled up with material.

Wrong nozzle on segment.

Vacuum sensor problem.

"2452 Leak in RV-head segment after placement Seg:"

The plunger is worn out.

"2454 Nozzle contaminated or worn out"

This message is caused by the camera. The nozzle is too dirty.

Too much dust or solderpaste on the nozzle.

Reject problems: nozzle-re-

lated, GF-related, feeder-re-

lated, segment-related.

The best thing is to use MaDaMaS and the error messages at

the station. Here the operator can obtain a lot of information to

solve the problem and maintain a high machine performance.

The operator has to find out whether the errors are nozzle-re-

lated, GF-related, feeder-related or segment-related before

starting on the problem.

Pick-up errors due to vacuum check:

Pick-up position is bad, feeder is not seated correctly on the ta-

ble, components between feeder table and feeder, nozzle is

deformed at the tip-the component cannot close the nozzle ad-

equately, o-ring on segment is defective, feeder does not sup-

ply the component correctly, feeder is not correctly

programmed, movable finger on the feeder does not uncover

the component in time, wrong nozzle, wrong setting for cubic

on/off in the GF-file, segment has too much friction-the prob-

lem especially shows up with very small components, support

under the tape for 0402 is not correctly seated or missing, etc.

GF-errors:

Wrong programming of the GF, such as toler

0402-subjects. Feeder: use the support between tape and feeder correctly.

Nozzles: check and maintain these nozzles more frequently

and replace them if necessary.

Segments: check friction of the segment (spring mecha-

nism!!!)

GF-data: use the correct values

Error Message: Recovery:

Student Guide HS-50 Advanced I 06/2002 Edition

20 Appendix

20.4.4 Common Program Related Problems

20.4.4.1 Testing and monitoring the status of the head board functions

On each gantry mounted above the revolver head is the interconnection board which is also

known as the head board 550. This PCB is used to transmit signals associated with the revolver

head, down through the ribbon cables to the various control elements.

Some of these functions are transmitted via the CANBUS system and it is possible to monitor the

status some of these elements using the LEDs fitted to the PCB. The next pages describe what

each of the LED’s indicate and how using the Sitest program it is possible to test the functions that

the LEDs monitor.

Also transmitted via the CANBUS are the signals from the vacuum measurement PCB. This func-

tion can also be tested in Sitest as well as the normal Single Functions menu in the operational

software. A description on how to perform these tests and how to interperate the result is given in

the following pages.

Error Message: Recovery:

The placement offsets are the

same for all positions.

The programmed x/y-values of the fiducials are incorrect.

Compare with CAD-data! Fiducial has not been centered cor-

rectly during the fiducial teaching. Test the fiducial in the func-

tion fiducial teaching! If a multiple board is only measured by 2

or 3 fiducials the problem can be wrong offsets of the single

boards. Check CAD-Data or program fiducial measurement

for every single board! If the line or subline is only composed

of one 80S or 80F-machine, the problem is possibly the offset

between RV-camera and PCB-camera of gantry 1. Calibrate

machine!! The screen printing process of solder paste is inac-

curate.

Offsets are constant at a sta-

tion but vary from one PCB to

the next. The offsets for one

PCB are even different from

station to station.

Fiducial recognition problems. The individual stations detect

the fiducial centers at different locations. Test the fiducial in the

function fiducial teaching again!

Component related prob-

lems:

Wrong nozzle.GF-data needs modification. For instance, illu-

mination, contrast, measurement modes, nozzle, camera

type, special handling, dimensions. Wrong placement posi-

tion; check with original cad data at first!