Riso GR 3770 Technical Manual page 44

TIMING CHART OF CLAMP PLATE CLOSING OPERATION
Completion of
master feeds to the drum.
Clamp motor
Clamp safety motor
180° angular sensor
0° angular sensor
<1> When Clamp Safety SW is kept pushed for a period longer than 1.5 seconds from turning ON of the clamp
motor, a clamp error is judged and "T14 CALL SERVICE" appears.
<2> When the 0° angular sensor and the 180° angular sensor are both held OFF or ON for a period longer than
1.5 seconds after Clamp Safety SW is released, "T3 CALL SERVICE" message appears.
<3> When the 0° angular sensor does not get ON even after 2 seconds from turning OFF of the 180° angular
sensor, a clamp error is judged and "T14 CALL SERVICE" message appears.
<4> When Clamp Safety Sw is not pushed even after 2 seconds from turning ON of the 0° angular sensor, a
clamp error is judged and "T14 CALL SERVICE" message appears.
T3 (Clamp Error (1))
• Both 0° angular sensor and 180° angular sensor are turned OFF or ON.
T14 (Clamp Error (2))
• Clamp Safety SW kept pushed.
• The 0 ° angular sensor not turned ON.
• Clamp Safety SW not pushed.
<1>
Pushed
<2>
Magnet detection
ON
OFF
5 - 5
End of operation
350 ms
Detached
<3>
OFF
Magnet detection
<3>
ON
MASTER MAKING SECTION
THEORY OF OPERATION
GR3770