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2-1
blinks on the Display (Backgauge Does Not Operate) Part 1
Why does
blink on the display ?
Backgauge is traveled by the screw shaft which is driven by motor. Encoder is installed directly at the back end of the screw shaft, and
the operation distance of backgauge is controlled by counting the number of pulse from the encoder. In case that pulse signal does not
come from encoder while the backgauge is moving, blinks on the display inform to the trouble.
Backgauge is at the front limit position.
When backgauge is at the front limit position
(in normal case about 25mm, when support
plate is fixed about 75mm), limit switch is on.
When turning the power switch on this condi-
tion, blinks on the display.
After moving the gauge a little backwards with
adjust knob, turn the power switch on again.
Adjust knob remains being pressed
Adjust Knob
Spring
Snap Ring
Bearing Unit
In normal case, the adjust knob is pressed by
compression spring to the operation side.
Even if you try to move the backgauge for-
wards or backwards when the adjust knob
remains being pressed for some reasons, motor
does not drive and blinks on the display
because the machine is in manual mode.
Shaft of knob is difficult to move.
When the knob does not move smoothly
forwards and backwards, check bearing unit.
Lubricate when movement is dull.
Snap ring unfastens.
When snap ring (STW-20) unfastens, fix it
again.
2-2
Compression spring is broken.
When compression spring is broken, replace it
with a new one.
Micro Switch
High Speed Motor Fuse
Low Speed Motor Fuse
Fuse is blown.
When motor protection fuse is blown, screw
shaft does not operate and no pulse rises from
encoder. Replace fuse according to Ò4-22Ó and
observe it.
2
2
5
5
5
5
A
A
A
A
A
A
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