VARILITE VL4, Руководство пользователя

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C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-65
02.9628.0010 CONFIDENTIAL
7-Oct-97
3.3.3.11 Douser Dashpot Calibration
Tools:
Screwdriver, Phillips #1
Artisan console
The dashpot is a piston traveling in a glass cylinder. The adjustment screw
controls the air pressure that builds up in the cylinder as the piston
approaches the end of the cylinder. The dashpot only works for one
direction of travel, so there are two dashpots linked to the douser
mechanism. The dashpots are used to cushion the shock of the douser
mechanism when it opens and closes. Without dashpots, the douser
mechanism would eventually damage itself as it slams open and shut. If
adjustment is too loose, the douser mechanism slams open or shut. If
adjustment is too tight, the douser mechanism will not fully open and shut.
Hint: In a properly adjusted dashpot, the piston goes to end of travel and
stops with no clicking sound and no slowing down.
To calibrate douser dashpots:
Step 1. Connect luminaire to console.
Step 2. Using console, cycle douser. During cycling process, adjust
screw "A" (Figure 3-18) so that dashpot piston just stops at
end of travel.
SCREW A SCREW B
Figure 3-18. Dimmer/Filter/Douser Assembly Douser Dashpot Calibration
Step 3. Repeat procedure for closing portion of cycle by adjusting
screw "B."
Step 4. Run douser for 5 minutes at 0.25 second chase rate (one step
consists of fully open and close stroke) with lamp extinguished.
Verify that douser works properly at end of 5 minute period.