205020 OTS Standalone Manual.pdf - 第21页
OVER THE TOP SNUGGER (O TS) OTS CONTROL RAIL Chapter Issue 3 Aug 14 Over the Top Snuggers (OTS ) Manual 1.9 Programmable ITV The programmable I TV valves t ake electr ical input s and convert them to a proporti onal pres…
OVER THE TOP SNUGGER (OTS)
OTS CONTROL RAIL
1.8 Over the Top Snuggers (OTS) Manual Chapter Issue 3 Aug 14
Vacuum valve (5) controls the vacuum generated by the venturi valve. The
vacuum generated is used to release the brakes in the mid plate.
Snug and brake valve (6) combines both actions, when on, the snug and brake
are activated, when off the vacuum is used to pull the brakes back (provided
valve 5 is on.)
The programmable ITV valve is used to proportionally control the snug pres-
sure.
Air lines in this part of the system are coloured black.
Brake
VAC
Generator
6A
Snugger
Pressure ITV
Valve 6
Snug & Brake
Valve 5
Vacuum
Snugger Cylinder
7A
7B
OVER THE TOP SNUGGER (OTS)
OTS CONTROL RAIL
Chapter Issue 3 Aug 14 Over the Top Snuggers (OTS) Manual 1.9
Programmable
ITV
The programmable ITV valves take electrical inputs and convert them to a
proportional pressure output. The output is dependant upon the upper level set
at the machine input supply solenoid.
The valves comprise a control circuit which performs the voltage/pressure
conversion, an exhaust valve which discharges excess air pressure, an air
supply valve which controls the output pressure for the specific function and a
pressure sensor which provides feedback to the control circuit.
In the OTS system, two functions are programmable: clamp pressure and
snugging pressure; for details on how to set these, refer to the programming
section of this manual.
Vacuum Ejector The vacuum ejector valve provides vacuum to release the brakes. Sixteen
brake cylinders are used giving a maximum holding power of 20Kg print
pressure.
The brakes are applied during the clamp on sequence, they are released during
the unclamping sequence. The valve works on the venturi principle where air
is evacuated through a tapered venturi tube creating a vacuum.
-
Control Circuit
Air Supply
Valve
Out
Out
Exhaust Supply
Valve
Discharge
Input Signal
Output Pressure
Pressure Sensor
+
Air In
Vacuum
Venturi
Silencer
Circuit Symbol
OVER THE TOP SNUGGER (OTS)
OTS CONTROL RAIL
1.10 Over the Top Snuggers (OTS) Manual Chapter Issue 3 Aug 14
Pneumatic
Regulators
Three pneumatic regulators are employed to regulate the pressure for the
following functionality:
• Over top cylinder extend
• Over top cylinder retract
• Mid plate balance
OTC horizontal movements are controlled by the two over top regulators; see
the Sequences section of this manual for details. The mid plate balance valve
provides sufficient upward lift to hold the mid plate weight. All three regulators
are factory set to achieve the optimum response for the operation.
IO Node 5 (OTS
and HTC)
Node 5 provides the electrical connection to the solenoids, CAN Bus and the
ITV valves.
NODE 5 OTS & HTC BOARD
198769 ISSUE
N5SK9
N5SK11
N5SK7
N5PL2
N5PL3
N5SK6
N5SK10
N5SK8
N5SK5
N5SK3
N5PL14
N5SK2
N5SK1
N5SK12
N5PL1
N5SK4
Connector Description
N5PL1 +12/+24V Power Input
N5PL2 CAN In
N5PL3 CAN Out (to screen cleaner, if fitted)
N5PL6 Digital Out 0-5 ~ OTS Solenoid Bank
N5PL10 Analogue ~ Snugging and Clamp Pressure Regulators