MINUTEMAN 320
78
REV 13.1:2020
Warning improper MAVD adjustment can lead to premature roller
wear.
Adjustment to the open and close speed of the MAVD/AVD is by way of the thumb screws on
the cylinder. Be sure the air supply lines are installed on the correct valve for correct operation.
When the lathe collet is closed the MAVD/AVD rollers/blocks will be closed if parameter is set to
operate this way. Pressing the Pre-Auto button and the lathe collet closed will command the
MAVD/AVD closed. Adjust as required.
The MAVD/AVD will include an open stop screw. If this screw is screwed in too far this will keep
the MAVD/AVD from opening fully. This could damage the rollers if larger material is loaded
without proper adjustment.
Installation tip – The MAVD air cylinder normally comes in the orientation shown in the image
above. We suggest removing the 4 mounting screws of the air cylinder and rotating the air
cylinder body so the air valves are positioned horizontal. This will help with the final cutting of
the lathe sheet metal covers.
MAVD Closed
Speed Valve
MAVD Open
Speed Valve
Close adjustment
Lock nut (A)
Adjustment screw (B)
Open adjustment screw
Lock nut (C)
Adjustment screw (D)
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