205020 OTS Standalone Manual - 第19页

OVER THE TOP SNUGGER (O TS) OTS CONTROL RAIL Chapter Issue 3 Aug 14 Over the Top Snuggers (OTS ) Manual 1.7 The over top plate valve (3 ) control s a pair of double act ing cylinder s which cause the plate to ext end or …

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OVER THE TOP SNUGGER (OTS)
OTS CONTROL RAIL
1.6 Over the Top Snuggers (OTS) Manual Chapter Issue 3 Aug 14
Pneumatic
Manifold
There are six solenoid valves in the manifold they are designated as follows:
• Valve 1 Mid Plate Up
• Valve 2 Mid Plate Down
• Valve 3 Over Top Plate Extend/Retract
• Valve 4 Top Plate Up/Down
• Valve 5 Vacuum
• Valve 6 Snug and Brake
The solenoid valves (1 and 2) control two pairs of double acting cylinders in the
mid plate of the OTS rails. With Valve 2 on, a programmable ITV valve is used
to proportionally control mid plate down. With Valve 1 on, it pushes the mid plate
up, when off, the balance regulator supplies low pressure to support the weight
of the OTS unit. A pair of speed controllers are used to control the speed of the
mid plate up; this prevents board bounce during unclamping. Air lines to and
from the mid plate cylinders are coloured blue.
ITV
Clamp Pressure
Mid Plate
Cylinder
Speed Controllers
Mid Plate
Cylinder
In
Valve 2
Mid Plate
Down
Valve 1
Mid Plate
Up
2A
1A
Balance Valve
OVER THE TOP SNUGGER (OTS)
OTS CONTROL RAIL
Chapter Issue 3 Aug 14 Over the Top Snuggers (OTS) Manual 1.7
The over top plate valve (3) controls a pair of double acting cylinders which
cause the plate to extend or retract. A pressure regulator controls each action;
the regulators are factory set and must not be adjusted. Two speed controllers
are employed to control the speed of the over top clamp retract movement; this
prevents board movement at the end of the clamp sequence. If a clamping
problem persists escalate it to Customer Support Group. Air lines to and from
the over top clamp cylinders are coloured red.
Top plate up/down valve (4) controls the top plate movement. Speed controllers,
in the top plate up line, are used to prevent board bounce during unclamping.
Air lines to and from the over top clamp cylinders are coloured yellow.
Over Top
Cylinder
Over Top
Cylinder
Out
Out
In
3A
3A
Speed Control
3B
3B
In
Valve 3
Overtop Clamp Extend/Retract
Top Plate
Cylinder
Top Plate
Cylinder
Speed
Controllers
4A
4B
Valve 4
Top Plate
Up/Down
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