Laurell Technologies
Operations Manual WS-650 Lite Series
Revision Date: 7/26/2011
All information contained in this manual is the property of Laurell Technologies Corporation® and is NOT to be edited, reproduced or
distributed without express written permission from a corporate officer.
69
4.1.1 VACUUM LOSS (ON UNITS EQUIPPED WITH VACUUM SENSOR ONLY.)
Vacuum readings >20” Hg typically indicate sufficient vacuum hold is present.
<15” Hg vacuum (factory setpoint) is normally considered insufficient to operate
safely. A flashing
“V=XX”
display is an insufficient vacuum indicator where
XX
is
the actual vacuum value being read by sensor.
Note: the vacuum setpoint can be changed (contact the factory for the adjustment
procedure)
4.1.2 REMOVING, CLEANING AND INSTALLING THE VACUUM VALVE
The vacuum valve is an air operated valve with an internal piston. Chemicals
such as photoresist or polyimides, which enter into the vacuum path, can prevent
this piston from moving. The piston will fail to operate due to chemical
contamination. If this happens and it is obvious that the vacuum valve is not
functioning properly, the following procedure can be performed to clean the
valve.
NOTE: FOLLOW THIS PROCEDURE CLOSELY AND BE CAREFULL NOT TO
LOSE THE 3 SMALL O-RINGS!
1
- Carefully remove
the 4 socket head
screws.
2
- Lift the 3 piece
assembly away
from the spinner
using great care
not to lose the
small face o-ring.
