Step 14 - Test Tamp
Goal:
Make fine adjustments to optimize the performance of the system once running.
•••• Sub-Step (a) ••••
Tamp Duration (2nd Tamp Duration)
The tamp duration, and 2nd tamp duration (if the Apply Mode is a dual action type), can be adjusted
through the user interface menus located on
. Set the duration and test the stroke by entering
the diagnostic menu of pneumatics on
, and press the “Tamp” button. The Auto-Retract
function will not be enabled, so that the stroke will represent the time setting. This setting is effected
by the tamp pressure of the system and the flow controls on the cylinder, so re-adjustment will be
necessary if these values change.
•••• Sub-Step (b) ••••
Tamp Pressure
The tamp pressure sets the force that the cylinder will exert on the product’s surface, and can limit the
speed of the cylinder travel. It is better to control the cylinder speed through the flow controls, than
through the cylinder tamp pressure. Adjust the tamp pressure to maximize the transfer of the label to
the product, without undue stress to the product or its packaging. Use the Pneumatics menu in
Diagnostics to test the Tamp after changes are made (
).
•••• Sub-Step (c) ••••
Air Cushion
The air cushion can be adjusted from the instructions on
. The air cushion can help reduce
tamp pad bounce when returning home, but can impact the final return time of the tamp pad to the
home position. Increase the air cushion adjustment so that no metallic ‘clank’ is heard when the
cylinder retracts, but not so much that the final half inch of return is belabored. This adjustment is
impacted by changes to the tamp pressure setting, so re-adjustments may be required. Use the
Pneumatics menu in Diagnostics to test the Tamp after changes are made (
).
•••• Sub-Step (d) ••••
Tamp Cylinder Flow Controls
The tamp cylinder flow controls limit the rate of cylinder movement on extension and retraction. Once
the tamp pressure has been set, use the flow controls to limit the rate of extension by utilizing the
control closest to the tamp pad. The rate of retraction is adjusted by the control closest to the home
sensor. The adjustment instructions are located on
. Use the Pneumatics menu in
Diagnostics to test the Tamp after changes are made (
).
•••• Sub-Step (e) ••••
Home Delay
As the rate of return is decreased, the air cushion is increased, or the tamp pad length is larger than 6
inches, more time is required to let the tamp pad settle before the next label can be fed. To avoid
feeding the next label too soon, the Home Delay (
) can be adjusted to wait a user-defined
amount of time after the cylinder is detected home, and before the next label is fed. This value can be
as low as zero for high-speed, smaller tamp pads, or up to several seconds.
Diagraph - an ITW Company PA/4600 & PA/6000 User Manual
Setup
Page 24
Setup
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