ITW Diagraph PA/4600, User Manual

Page: 21 / 53

Step 10 - Set the Tamp Pneumatic Controls
Goal:
Adjust the optimum tamp pad travel to ensure label transfer to the product
These adjustments will require an initial setup and a final adjustment, as other parameters are
changed. The pneumatic adjustments will determine how fast the system will deliver the label to the
product, and how well it will be applied. Since application requirements vary, the pneumatic
adjustments allow a wide range of control to best optimize the system’s performance.
•••• Sub-Step (a) ••••
Begin by setting a tamp pressure, seen below as regulator knob
(A). Start with a mid-range value of 45 psi by rotating the knob
clockwise to increase the pressure and counter-clockwise to
decrease it.
For applications requiring higher throughput, increase the
pressure to a value between 50 - 70 psi. For light touch
applications, reduce the pressure to a value between 30 - 40 psi.
•••• Sub-Step (b) ••••
Adjust the tamp cylinder flow controls, identified as (C) and (E) on
the figure to the right. These controls vary the speed of the
cylinder, on retraction (C) and extension (E). Turning the setscrew
clockwise decreases speed. Conversely, turning the setscrew
counter-clockwise increases the speed.
•••• Sub-Step (c) ••••
The air cushion absorbs the shock of the tamp returning to the
fully retracted, or home position. To increase the amount of
cushion, turn setscrew (B) clockwise, to decrease it, turn it
counter-clockwise. Too much air cushion can delay the tamp
return to home, thus reducing throughput and possibly causing a
label to feed into the edge of the tamp pad.
•••• Sub-Step (d) ••••
The cylinder home sensor monitors the final retraction of the tamp
cylinder and signals the system when it is safe to feed the next
label. This position on the cylinder is set at the factory and should not need adjustment. If adjustment
is required, loosen the screw that holds the sensor clamp in place. With the line pressure on and the
power on, slide the sensor up from the opposite end until the light on the sensor illuminates.Tighten
the screw and re-verify this position is correct by disengaging the line pressure and manual extend
and retract the cylinder, noting clean on and off of the sensor’s light.
A
Increase Decrease
A - Tamp Pressure
(bottom view)
B
C
D
E
B - Air Cushion Adjust
C - Return Flow Control
D - Cylinder Home Sensor
E - Extend Flow Control
Inc.
Dec.
Inc.
Dec.
Diagraph - an ITW Company PA/4600 & PA/6000 User Manual
Setup Page 20
Setup