Training Guide Course No. 196514
Level 2 Maintenance, X-1000 Series Dispensing Systems 4-69 P/N 196515 (Revision A)
Information Sheet 4-6-2
Troubleshooting the Servo Controller (Continued)
Symptom Probable Cause Fault Isolation Procedure Page
High vibration during X or Y-
axis movement
X or Y-axis
Rotary Encoder
“X-Axis Rotary Encoder
Verification” or “Y-Axis
Rotary Encoder Verification”
in PMAC Rotary Encoder
Fault Isolation
4-73
4-75
High vibration during Z-axis
movement
Z-axis Rotary
Encoder
“Z-Axis Rotary Encoder
Verification” in PMAC Rotary
Encoder Fault Isolation
4-77
Fast movement in X or Y-
axis with no vibration before
Dispensing Head stop
Linear Encoder
PMAC Linear Encoder Fault
Isolation
4-79
With power OFF, binding
and unusual noise when
manually moving the
Dispensing Head
Mechanical
System
PMAC Mechanical Fault
Isolation
4-84
Dispensing Head hits
mechanical hard stop during
homing process
Home Sensor
PMAC Home Sensor Fault
Isolation
4-86
C. Troubleshooting Guidelines
1. A dispensing system in need of troubleshooting may have High Voltage
present in both designated and unsuspected places that can result in injury
or death. It is imperative to adhere to Safety Precautions outlined in the
Safety Section of this training guide.
2. Disconnect and lockout power to systems connected to the dispensing
system (such as loaders and ovens) before troubleshooting. Failure to do so
may result in serious injury or death.
3. Troubleshooting should only be performed by an Asymtek Field Service
Engineer or an Asymtek-trained service technician.
4. Problems resulting from environmental and applications abnormalities, spills,
obstructions, and workpiece irregularities that are not system related should
be eliminated prior to undertaking more advanced troubleshooting.
5. To quickly identify problems, look for obvious signs such as burnt, discolored,
missing, damaged, or loose parts, obstructions, and foreign objects. Obvious
uncharacteristic odor, heat, noise, vibration, or movement can also be used
to quickly isolate problems. If a problem reoccurs frequently, there may be
other root causes to the problem.
6. Use proper Electrostatic Discharge precautions when handling the ESD
sensitive PMAC Card. Failure to do so, can result in irreversible damage to
the PMAC Card.
7. When Dispensing Head travel limits are not correct, the Dispensing Head can
hit hard stops causing potential hardware damage.
8. Use caution when reaching your hand into the dispensing chamber while
system is under power. Failure to take appropriate precautions could result in
injury or property damage
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