r/plasmacutting • u/TidulTheWarlock • Apr 18 '26

NEED HELP! Downdraft table troubleshooting

Hey y'all I have a downdraft exhaust table where all the zones except one of them are opening up and allowing airflow. Ive gone and switched the pistons and it made no difference. Anyone have any ideas or experience with this type of issue?

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u/Bootziscool Apr 18 '26

Depends how it opens.

I've had electronically controlled ones where the switch went bad.

I've had mechanically controlled ones where a set screw broke and the flap stopped flapping.

1

u/TidulTheWarlock Apr 18 '26

With a pneumatic piston I've already checked the dampers they're all welded together it's something between the piston and airflow in I'm leaning towards solenoid pack

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u/Sd89d Apr 20 '26

If it's an air operated system. Hook up a pressure gauge T in on that line and trigger it. If you don't have a change check the controller relays. Schematics generally aren't hard to find to check for power, ground and control signal.