40
•
You do not push in the dobby treadle far enough.
•
The cord between the treadle and the reversing disk is too loose or too tight.
•
The position of the reversing disk is not properly adjusted.
•
The cords connecting the reversing disk to the anchor are not properly positioned over
the rollers.
With the mechanical dobby, the knife is stuck between the screw heads of the dobby
hooks
Possible causes:
•
You moved the dobby by hand while you kept the treadle for the shed pushed in.
•
With a second warp beam and a sectional warp beam we supply extra springs, which
help to compensate for the extra weight of the back part. If these springs are adjusted
with too much tension, you will experience that the whole back part of the loom bounces
when the shed treadle is released. If the dobby position is changed at the moment that
the back part jumps back up, screw heads above the knife can come forward and block
the knife.
In both cases you can eliminate the problem by turning the roller of the dobby head half way
between two positions and moving the knife up and down with the treadle for the shed. All
the screw heads will come free. When the knife is all the way up again, you turn the roller into
a fixed position.
The interface does not react to a command of the computer
•
Determine if you have power.
Turn the power off and on. The red light should come on, indicating there is power on the
interface. Also the solenoids should temporarily activate and immediately de-activate, and
the fan will start running.
If this does not happen, remove the fuse holder from the power entry module, and replace
the fuses. You need a small screwdriver to do this. See the installation instructions. Be sure
that you replace the fuse holder in the right direction, showing the appropriate voltage after
closing the window. Repeat the process to confirm you have power on the interface.
•
Run the self-test.
While pressing the white switch on the interface, turn on the power switch. When the first
solenoid activates, you can let go of the white switch. The interface will cycle through all 16
or 32 solenoids, and then it will repeat. With a 16 harness Megado you will observe that there
is a time lag before the repeat begins. This is because the interface is trying to cycle through
32 shafts. This test shows the circuit board is working properly.
•
Determine whether the interface communicates with the computer.
With the interface taken off of the loom, remove the magnet from the knife. Switch on the
interface, select a pattern in the weaving software and tell the software to “WEAVE”. Hold the
magnet in front of the top
magnetic sensor
(on the 16 shaft interface the top magnetic sensor
is located in the second hole from the top). The first “pick” should activate. Slide the magnet
down to the bottom sensor. You should see all solenoids de-activate. Slide the magnet back
up to the top switch, where the next pick will activate. This mimics the action of the loom. The
top sensor selects the next pick. The bottom sensor de-activates the solenoids.
If the solenoids activate according to the signals of the computer, while manipulating the
magnet, the problem is the location of the magnet on the loom.
Solution: You need to re-adjust the location of the magnet a bit on the knife bar and you can
adjust the position of the knife bar (see adjusting the knife bar in the loom instructions).
Summary of Contents for Megado 110
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