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1.0
Operation
Throughout this manual, there are a number of
Hazard Warnings that must be read and understood
in order to prevent possible personal injury and/or
damage to the equipment. Carefully read these warn-
ings. They are included to protect you!
1.1
Description:
This manual describes two
Airflex@
timing
control devices, namely, the
Airflex@
Cam
Limit Switch and the
Airflex@
Timing
Rotorseal. The cam limit switch is a rotary
cam timing switch device. The timing
rotorseal combines the features of a rotary
cam timing switch with those of a rotary air
seal in one compact unit. Both of these
devices are primarily designed to control the
operating functions of mechanical power
presses. Both devices are also referred to as
timers in this manual, since the timing opera-
tion for both devices is the same.
bullgear of an
Airflex@
standard press ap-
plication clutch and brake package (see
Figure 2).
1.2
How It Works:
When these devices are properly wired into
the appropriate
Airflex@
press control system
(refer to Manual CP 3080), these devices can
provide the following functions:
l Inch
l Single stroke
l Continuous
l Semicontinuous
l Monitor the stopping effective-
ness of the braking system
The
Airflex@
press control system requires
two of the timers, in any combination, to con-
trol the above functions and to monitor each
other for failure and shaft breakage.
These devices can be furnished for either
clockwise or counterclockwise rotation. The
direction of rotation of the device is identified
by a decal on the cap and is determined by
viewing the device from the cap end. Timing
rotorseals supplied with
Airflex”
FSPA clutch
and brake packages are assembled for
counterclockwise rotation unless otherwise
specified on the order.
The cam limit switch can be furnished for
either shaft mounting or for foot mounting
with a chain drive (see the illustrated Parts
List in Section 4.0). The timing rotorseal is
designed to be assembled to the flywheel or
The operation of the timing section of the
timing rotorseal is the same as that of the
cam limit switch. In this respect, both devices
are referred to as timers in this manual. There
are five shaft mounted cams which, when
rotated, open and close four automotive type
breaker points (see Figure 1) as LS1, LS2, LS3
and LS4.
LS1 and LS2 are controlled by cams No. 1 (24)
and No. 2 (26) respectively (see Section 4.0 for
item numbers in brackets). LS3, when used for
brake monitoring, is controlled by a two piece
cam No. 3 consisting of an insert (28) and an
outer cam (28A). An optional one piece cam
No. 3 is supplied with both devices that
replaces the two piece cam for applications
that do not require brake monitoring. LS4 is
controlled by split cams No. 4 (33) and No. 5
(33A). Cam functions are discussed in Section
1.2.1.
The timing rotorseal, besides providing the
same timing functions as does the cam limit
switch, also provides a means of air delivery
from a stationary source to operate a rotating
component such as the
Airflex”
clutch. The
seal between the stationary center section
(11) and the rotating adapter (1) is provided by
the inner and outer carbon seals (16 and 19).
The lapped surfaces of these seals are held
against the rotating adapter (1) by inner and
outer springs (12 and 13). Air enters the
stationary center section (11) and passes
through the seals into the rotating adapter (1).
Cam Functions:
The
Airflex”
press control system requires
two timing devices. To differentiate between
the timers both the cam limit switch and the
timing rotorseal have a decal, affixed to the
end cap, with tabs labeled “A” and “B”.
Therefore, one timer should be labeled “A’
and the other “B”; the unused tabs are re-
moved. To be consistent with the
Airflex@
press control wiring diagram the timer that
monitors the brake should be labeled “A”.
The control functions of the cams are:
Cam No.
“A” Timer
“B” Timer
1
Nonrepeat
Nonrepeat
2
Top Stop (Continuous)
3
Brake Monitor
Nonrepeat
Semicontinuous Brake Monitor
or Special Function
4&5
Top Stop (Single Stroke)
Top Stop (Single Stroke)
2