HS50_advance_level 1_20200522_221201 (1) - 第547页

06/2002 Edition S tudent Gui de HS- 50 Advanced I 20 App endix 20 Counting e rror (X,Y) - axis. Grease or d ebris on en coder scale. Clean with alcohol. S tar doe s not turn becaus e of valve control. A valve is s ticky …

Student Guide HS-50 Advanced I 06/2002 Edition

20 Appendix

20.4.3 Common Machine Problems

The following problems are given as some of the most common problems that can occur in the

day to day working with the machine. Each problem is first described and then potential solutions

are offered. These are designed to offer a useful start for machine trouble shooting.

Error Message: Recovery:

Nozzle gets dirty or worn Remove and clean the nozzle in the appropriate segment or

replace the nozzle if there are any left in the changer.

Difference between open and

closed vacuum values are too

small.

Wrong nozzle on the sleeve. Repeated occurrence at the

same segments infers the need to clean the valves.

Star doesn't turn because of

valve control.

Move valves of segment concerned and press the start button

for a reference run. Clean or exchange the valve in case of an

error with a single unit.

Unable to find the fiducial or

ink spot during position rec-

ognition

Press the start button and ALT+8 to switch the display to the

camera picture for diagnosis. Possible problems: conveyor set

too wide; bad fiducials or ink spot; search field too small; bad

or damaged circuit board.

Pick-up problems (track

empty errors).

Check feeders for correct pitch, proper seating (debris under

feeder or debris on magnetic track?). If feeder is feeding prop-

erly, make sure the tape cover is properly closed, check for

parts in the feeder drive, proper movement of tape cover and

tape reel, proper tape retraction, or the correct vacuum at the

star. Turn the maintenance key and operate in single function

mode for diagnosis.

Error with the height refer-

ence run.

Nozzle is missing. Wrong nozzle. Nozzle did not lock after a

nozzle change.

X,Y axes invalid command or

deenergized.

Try the start button 2 or 3 times. Under gantry functions - >

gantry reference run.

Communication with compo-

nent table disrupted

Options - > load component table program. Power machine off

then on again. Check component table data and power cables.

If problem occurs with certain component/feeder, exchange

the feeder.

Switch on compressed air Compressed air supply pressure too low. Do not leave the ma-

chine switched on with insufficient air for more than 15 min-

utes!

Error when converting GF

data. GF data most likely cor-

rupted from the line com-

puter.

Cycle power on the line computer and all stations. Most likely

GF data defective with a newly created GF.

Printed circuit board feed er-

rors.

Check sensitivity of the sensors. Check the center sensor for

contamination.

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: