MINUTEMAN 320
77
REV 13.1:2020
5. Tighten screw A until the rollers just touch the bar. Rotate the screw to back off the rollers
from the bar 1 full turn. Lock jam nut B
6. Press the Manual button , MAVD/AVD will open, press the Pre-Auto Button ,
rollers will close.
7. Press the Manual Button to open MAVD/AVD
8. Close hood and adjustment is completed
9. The MAVD/AVD may have an opening stop screw and is normally set to full open.
Warning improper 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.
Closed Speed
MAVD/AVD Open
Speed Valve
Adjustment screw (B)
Lock nut (A)
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