Eaton Electrical TRS 3064 User Manual
TRS 3064
Installation,
Operation and
Maintenance of
the
Airflex@
Timing Rotorseal
and Cam
Limit Switch
Revised: Feb. 1, 1982
1.0
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 warnings. They are included to protect you!
1.1
Operation
Description:
This manual describes two
control devices, namely, the
Limit Switch and the
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 operation for both devices is the same.
When these devices are properly wired into
the appropriate
(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@
two of the timers, in any combination, to control 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
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
Airflex@
press control system requires
Airflex@
Airflex@
press control system
Airflex”
timing
Airflex@
Cam
Timing
FSPA clutch
bullgear of an
plication clutch and brake package (see
Figure 2).
1.2
How It Works:
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
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”
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 removed. To be consistent with the
press control wiring diagram the timer that
monitors the brake should be labeled “A”.
The control functions of the cams are:
Airflex@
press control system requires
standard press ap-
Airflex”
clutch. The
Airflex@
Cam No.
1
2
3
4&5
“A” Timer
Nonrepeat
Top Stop (Continuous)
Brake Monitor
Top Stop (Single Stroke)
“B” Timer
Nonrepeat
Nonrepeat
Semicontinuous Brake Monitor
or Special Function
Top Stop (Single Stroke)
2
Figure 1 illustrates the cams assembled in
the timing section of both devices and their
relationships.
No.
1 Cam
No. 2 Cam
Insert
No. 3 Cam
Cams for Clockwise Rotation
Cams for Counterclockwise Rotation
No. 4 Cam
insert
Figure 1. Cam profiles and their relationships
3
Cam No. 3 (28 and 28A) monitors the effective-
ness of the press braking system at the top of
the stroke. When cam No. 3 is positioned
according to Paragraph 2.3, deviations in
stopping position greater than + 15” from top
dead center will be detected.
All control systems, except those capable of
inch and continuous functions only, require
two timers. When two timers are used, except
on control panels with semicontinuous function, only the two piece cam No. 3 of the “A”
timer is required for brake monitoring. The
cam No. 3 of the “B” timer, is available for a
user’s special function such as a counter. The
optional one piece cam No. 3 profile is the
same as cam No. 4 shown in Figure 1.
LS4 is controlled by split cams 4 (33) and 5
(33A). This set of cams determines the top
stop setting and the amount of time the run
buttons must be depressed before the operator
can remove his hands from them. If the run
buttons are released before this predetermin-
ed setting, the press will stop.
The minimum dwell setting of these cams is
135”,
and they are fannable up to 255” in increments of 40 ‘. For the proper setting of
these cams, refer to Paragraph 2.3.
2.0 Installation
!
n
Danger:
Prior to installation of the
Rotorseal and Cam Limit Switch, make sure
that the machinery is secured in a safe
manner. Failure to do so could result in
serious injury or possibly death.
!
n
Warning:
Only qualified maintenance personnel should
install, adjust or repair these devices. Faulty
workmanship will result in unreasonable
exposure to hazardous conditions, injury or
severe damage to the equipment.
!
Caution:
n
Before you begin any work, study this manual
so that you completely understand what is
required. Do not risk injury. Follow the
instructions.
2.1
2.1 .1 Timing Rotorseal:
Mounting
Instructions for mounting the
rotorseal, foot and shaft mounted cam limit
switches are given below. Any combination of
these times may be used in the control
system. Follow those instructions that pertain
to the timers being used.
The
Airflex@
designed to fit the flywheel or bullgear of an
Airflex@
shown in Figure 2. The flywheel or bullgear
timing rotorseal is custom
FSPA clutch and brake package as
Airflex’“’
Airflex’)
Timing
timing
Grease Hole
Figure
\
\
2. Timing rotorseal mounting configuration
The timing rotorseal end plate (36) is used to
assemble the device to the crankshaft. The end
plate also provides the necessary bearing running clearance and must be properly shimmed.
Follow instructions given in Form PP3000.
Before mounting the timing rotorseal, check
to be sure its direction of rotation corresponds
with that of the flywheel or bullgear.
/-
Grease Fitting
and Lockwasher
4
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