9.2.3.4
E265: Chin rest zero sensor is always active /
E266: Chin rest zero sensor not active when expected /
E268: Chin rest timeout
These errors are displayed if a problem on the chin rest axis movement (motor M6)
is present. The position of chin rest axis is controlled by the optical sensor B4, that
is activated at the chin rest reset axis movement.
E265 is displayed when the sensor B4 is found active at the unit start-up phase, and
it is never sensed de-activated.
E266 is displayed when the sensor B4 is never sensed activated.
E268 means that the optical sensor B4 is never activated during the chin rest reset
axis movement.
The above errors may be caused by the B4 sensor B4 and/or its connections fault
or by a malfunctioning of the chin rest motor M6 system (MCU driver or motor
group fault).
1.
If the chin rest does not move or moves with difficulty or jumps:
a.
check the motor system integrity and functioning, verifying that there are
no mechanical interferences in the chin rest run moving by hand the
system, switching off the unit and manually rotate the screw hub (indicated
by the red arrows in the following figures):
Figure 46
If there are mechanical problem on the motor linear guide system, fix it or
replace the whole chin rest motor linear guide system.
b.
If the mechanical system functioning is ok, check cable X49-X20 and motor
M6 integrity (short circuit, broken wires or loosen contact on the pins).
Replace the cable or the motor M6.
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