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X-Drive Motor Replacement
•
This repair requires timing and other adjustments and should be performed by an authorized
service technician.
Besides in case of an x-motor failure, the X-motor assembly should also be replaced when the resistance
between each of the phases is inconsistent or substantially different than 3.65±10%
Ω
. In addition, the
resistance between each of the phase wires should be relatively consistent with the other wires.
Figure 1 - Measuring Resistance Between Motor Phase Wires
Resistance of the x-motor phase wires can be measured at the connector with an Ohmmeter as shown in
Figure 1 above. Disregard the green (ground) wire and measure the resistance between each combination
of the other 3 wires.
Measuring resistance however, is not the only factor to be used in determining whether to replace a mo-
tor or not. Examples of other issues that should be considered is how freely and smoothly the spindle on
the motor turns. These factors are covered in the troubleshooting section of this manual.
Replacement Parts Needed:
• x-axis brushless servo motor
• 6-11 inch Cable Ties (to re-tie the harnesses after installing the new motor) (available at most
hardware stores in the electrical section)
Replacement Procedure
1. Turn the machine OFF.
2. Remove the left arm cover and the screw from the back of the right one.
3. Remove the upper arm back cover.
CAUTION!!
Use extreme care not to drop metallic objects, tools, or other conductive material
on the Main PCB when you have the base cover removed. If you drop such objects on the Main
PCB, it can severely damage the electronics, which can be expensive to repair.
4. Remove the base cover.
5. Remove the EMI cover.
6. Remove the lower arm rear cover.
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