Before mounting the timer, check to be sure its direction of rotation corresponds to that of the shaft. Fasten the flange to the shaft with lockwashers and cap screws.
Refer to appropriate paragraph and mount second timer.
Wiring instructions are given in Paragraph 2.2.
2.2 Wiring:
Two rotary timers are required in the Airflex@ press control system. The timers must be appropriately labeled to identify them and the functions they control. The timer that monitors the brake’ should be labeled “A” to agree with the Airflex@ wiring diagrams. Label the other timer “B”. “A” and “B” decals are furnished on each timer end cap. Remove the letter that is not used.
The timer is internally wired at the factory. All leads have the breaker point number to which they are wired printed on the insulation. Label each lead with the corresponding schematic wire number and “A” or “B” to identify the timer to which the lead is connected.
An insulated straight connector fitting for 3/4 inch flexible conduit is furnished with the timer.
n! Caution:
A length of flexible conduit must be used between the timer and rigid conduit. This flexible connection allows compensation for any eccentricity between shafts for shaft mounted timers and will permit chain tension adjustments for the foot mounted timers.
Use 16 gauge stranded machine tool wire, U.L. listed, 105OC temperature rating, voltage rating 600 volts, minimum insulation thickness 0.031”, oil resistant, for wiring the timers to the control panel.
n! Caution:
No strain relief is provided internal to the timer. Therefore, when wiring the timer into the application, provide enough slack wire to prevent wire breakage at the contact points.
2.3Timer Adjustment:
Reread and follow the Hazard Warnings stated under Paragraph 2.0.
Cams No. 1, 2, 3 insert, 4 and 5 (24, 26, 28, 33 and 33A, respectively) are dowelled together and are adjusted as a unit. The outer part of cam No. 3 (28A) in timer “A” is adjusted separately. All the cams, once adjusted, are clamped together by tightening of the two jam nuts (30). See the illustrated parts list in Section 4.0 for the relationship of these parts and when making adjustments.
2.3.1. Top Stop and Brake Monitoring
For existing installations: proceed to Step “g”.
a)Position the crankshaft at top dead center. Make sure, it will remain in a safe position.
b)Turn electrical power off to main control panel.
c)Remove end cap (31) from timer by remov- ing the two socket head cap screws.
d)Loosen jam nuts (30). Hold adjusting knob (29) and align indicator groove on cam No. 3 (28A) in timer “A” with fiber cam follower of LS3 as shown in Figure 4.
No. 3 Breaker Point
Fiber Cam Follower
Indicator Groove
Figure 4. Brake monitoring cam alignment
e)Retighten the jam nuts (30).
f)Position felt seal (34), replace end cap (31), install and tighten the two socket head cap screws. Turn electrical power on.
g)Stroke press to check the stopping position.
h)Note the relationship between the desired stopping position and the actual stopping position.
i)If the stop is unsatisfactory, inch to the top of the stroke. Secure the machine in a safe manner to avoid possible injury.
j)Turn electrical power off and remove end cap (31).
k)Loosen jam nuts (30) and rotate adjusting knob (29) in opposite direction of cam arrow to advance the stopping position, or in same direction of cam arrow to retard the stopping position.
l)Hold adjusting knob (29) from rotating and align indicator groove on brake monitoring cam No. 3 with fiber cam follower of LS3 as shown in Figure 4.
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