HS50_advance_level 1_20200522_221201 (1).pdf - 第548页

Studen t Guide HS-50 A dvanced I 06/200 2 Edition 20 App endix 21 Segm ent related of fsets. T o find out w hether offsets are related to a sp ecific segment the NC-file at t h e line-com- puter has to be consulted. Here…

06/2002 Edition Student Guide HS-50 Advanced I

20 Appendix

Counting error (X,Y) - axis. Grease or debris on encoder scale. Clean with alcohol.

Star does not turn because of

valve control.

A valve is sticky or not correctly inserted.

Segment leaky. Clean or exchange valves. Clean valve socket with an alcohol

soaked foam swab. Change nozzle and sleeve. Otherwise:

have maintenance remove the front half of the head and clean

the vacuum system.

Machine gets mixed up with

nozzle configuration in the

nozzle changer or on the

head.

The best here is to go into single functions and select "reject

all nozzles". Afterwards all magazines of the nozzle changer

are correctly filled up with nozzles. Then the refilling of the noz-

zle magazines has to be confirmed on the station computer.

Now the machine is ready again.

All placement positions have

the same offsets.

Problem: The offset between RV -and PCB-camera of gantry

1 is incorrect. Gantry 1 measures the position of the PCB!

Solution: Recalibrate PCB and RV-camera of gantry 1 and

also calibrate the segment offsets. Afterwards calibrate the

machine zero-point for x/y-axes for both gantries.

Gantry 2 has always the

same offsets.

Problem: Gantry 4/1 or 2/3 or both are not correctly calibrated

on the x/y-calibration point (wrong zero-point-correction value

for the x/y-axes).

Solution: Recalibrate the machine zero point for the x/y-axes

for both gantries.

Problem: The offset between RV and PCB camera of gantry

1/3 is wrong.

Solution: Recalibrate PCB and RV-camera of gantry 1/3 and

also calibrate the segment offsets. Afterwards calibrate the

machine zero-point for x/y-axes for both gantries.

Problem: the zero-pulse of the x or y-axis is not detected

clearly. It is measured in slightly different positions. The prob-

lem can be at gantry 4/1 or 2/3. The problem is always tempo-

rary until the next reference run for the x/y-axes!!! After the

reference run, the offset is different to the previous offset.

Solution: Check the zero-pulse signal of either x or y-axis.

The problem can be a dirty or damaged encoder system. In

case of damage the encoder scale or encoder reading head

has to be replaced. The signal can be improved to some extent

by adjusting the Problem.

Error Message: Recovery:

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: