Originally Posted by
Ron Selzer
On mine you can hear air blowing all the time
When changing belts I insert the belt until I hear the air flow change at which time the top head angles. Pull the belt back a touch and it will angle the other way and air flow sound changes back. At this time it is close enough to use. When it starts up the belt will start tracking with the control moving the head a little bit as needed. If the belt goes too far either way than there is a finger on a limit switch that shuts the machine down. Sometimes a belt gets to where it will constantly run of to one side, I then remove the belt and turn it 180 and insert it back in. Seems to fix that problem. Have a schematic somewhere that lists the airflow requirements. Would be nice to use a smaller compressor to tension the belt and only run when needed for changing belts.
Ron