RPX Technologies DynaVibe Classic, User Manual

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Guide to Dynamic Balancing V1.09
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Error Messages
•
"Sensor Error" - This indicates that there is a problem with the accelerometer
signal. Check the cables and be sure the accelerometer is completely plugged into
the DynaVibe.
• "No Tach" - This means that the DynaVibe is not receiving tach pulses. Note that a
continuous signal will generate this message. To test the optical pickup, reflect the
light from a piece of reflective tape that is statically positioned at least 6 inches
from the optical pickup. The red light on back of the pickup should come on. Then
pass your finger back and forth quickly to break the beam. The tach reading should
become live. Note that the accelerometer MUST be plugged in for this procedure.
Doesn't Balance as Expected
•
Verify compression on all cylinders, a weak cylinder will cause significant
vibration.
•
Verify that all cylinders are operating correctly by reviewing cylinder head
temperatures. If cylinder temperatures are drastically different, it may indicate bad
spark plug wires, fowled plugs, intake leaks, poor fuel distribution, etc.
•
Verify that the spinner is balanced by placing it on a smooth surface and determine
if it has a heavy position. The spinner must be statically balanced to balance the
propeller. Unbalanced spinners may cause spinner plate cracks.
•
Check that the spinner attachment plates are not cracked or damaged and that the
spinner attaches snug on the propeller. Cracks indicate fatigue caused by flexing of
the backplate. A loose spinner will shift in operation and cause variable readings.
•
Check for cracks in the engine mount tubing and attach points. Look for cracking
or structural damage on the firewall and engine mounts. Verify that the engine
isolators are not cracked, compressed, or damaged.
•
Check that the engine cowling does not show signs of significant wear caused by a
part of the engine touching or component touching the cowling. Verify that the
exhaust has not be in contact with the cowling.
•
Consider using a DynaVibe GX2 system to determine the source of the vibration.