MUTOH SC-650 - Head Flex Cable Replacement

Maintenance Manual – SC Cutting Plotter
69 AP-74030, Rev / B
Remove the screw on top of the pulley shaft (Please refer to screw 9 on figure 6.2.8. Y-drive belt
(long) 1) Y-drive belt (long) step 3) and remove the pulley assy from the bracket. If not possible,
the Y-drive belt (long) need to get more play by turning the screws of the return pulley CCW.
Now the Y-belt (short) can be removed.
1) Y-motor and drive belt : installation and adjustment.
Step 1 : Install the Y-drive belt (short) by performing the above steps in reverse order.
Step 2 : Turn in the screws from the Y-motor a few turns, but do not fix them.
Step 3 : Attach the bar tension gauge (range 5 kg, MUTOH part# JD-41446C) to the motor shaft (use a
piece of rope or pressure measurement attachment JD-41563) and pull for 3.5 kg ± 0.05 kg.
Note :
Y-drive belt tension for SC-550 = 2.5 kg ± 0.05 kg.
While pulling the gauge, move the cutting head manually left and right a few times before fixing
the motor screws.
6.3.12. Head flex cable : removal and installation.
Step 1 : Remove the transparent cover (Please refer to 6.2.2. transparent cover) (Not on SC-550).
Step 2 : Remove the Y-rail cover (Please refer to 6.2.4 Y-rail cover).
Step 3 : Remove the head cover by removing the screw in the middle of the cover and unscrew the
bottom screw a few turns. The head cover can be removed by sliding upwards.
Step 4 : Open the 2 white connectors by sliding them to the front and pull away the 2 flex cables from the
connectors. Remove the head PCB on top of the head by 2 screws and lay it somewhere on the
Y-rail where the flex cable cannot be harmed.
Step 5 : Open the PCB box (Please refer to 6.2.3. PCB box). For the SC-550 remove the right cover
(Please refer to 6.2.1. Covers left and right).
Step 6 : Remove the flex cable from the terminal board.
Step 7 : Remove the right cover (Please refer to 6.2.1. Covers left and right) and open the cable guides
that holding the flex cable.
Step 8 : Remove the flex cable.
Note :
Pay attention to the position of the cable in the way that it is guided all through the
machine.
This will simplify the installation.
Note :
To reinstall the head flex cable perform above steps in reversed order.