Pneumatic Control Valves And Gauges - Printronix SLPA8000 User Manual

Chapter 2
Control Panel

Pneumatic Control Valves And Gauges

Air Cylinder Regulator
NOTE: You may also adjust the cylinder delay time through the Applicator
The air cylinder regulator (CYLINDER valve) is used to regulate the air to the
applicator cylinder. The regulator setting affects how quickly the applicator
pad will extend (apply stroke) and return (return stroke) during the apply
cycle. This adjustment determines the force with which the applicator pad will
contact the product. If set too high, the applicator pad could contact the
product with enough force to cause damage. If set too low, the applicator pad
may not contact the product. The air pressure delivered for the apply stroke
and the return stroke is equal.
NOTE: Do not exceed 60 psi.
Monitor the setting of the air cylinder regulator using the PRESSURE gauge.
Air Jet Adjustment
The air jet adjustment (AIR JET) controls the air supply to the air jet tube. Air
is forced out the air jet tube allowing the labels to properly transfer over the
peel bar then to the applicator pad. If the adjustment is too low, the labels will
not properly transfer from the printer to the applicator pad. If set too high, the
label edge will be incorrectly positioned. The air jet is factory preset. Adjust
the air jet pressure by turning the AIR JET control clockwise to increase the
flow, counterclockwise to decrease the flow. See "Positioning The Air Jets" on
page 50.
Vacuum Adjustment
NOTE: You may also adjust the vacuum delay time through the Applicator
The vacuum adjustment (VACUUM) controls the amount of air flow through
the vacuum generator, thus determining the amount of vacuum holding the
label onto the applicator pad. A weak vacuum will cause labels to fall off of the
applicator pad prematurely. A vacuum that is too strong, however, can cause
difficulty when transferring the label onto the applicator pad and the product.
Vacuum is increased by rotating the valve clockwise and decreased by
rotating the valve counterclockwise.
NOTE: To get a vacuum on every label, every hole on the applicator pad
Monitor the setting of the vacuum adjustment using the VACUUM gauge.
The minimum setting is 20 inches hg.
38
Delay menu. See "Applicator Delay Menu" on page 180.
Delay Menu. See "Applicator Delay Menu" on page 180.
must be covered by the label surface.