How do the Unclamp, Z-Clean, and Turbo Lock ports on a pneumatic chuck work?
Updated
MaxxTooling pneumatic chucks have an Unclamp port, a Z-Clean port, and, on some models, an optional Turbo Lock port. They are normally closed: internal springs clamp the pallet when air is removed from Unclamp. Applying air at 6±1 bar opens the chuck and releases the drawbar or spigot.
In the states below, OFF means no air is supplied and ON means air is supplied.
Clamp state — during machining:
- Unclamp: OFF
- Z-Clean: OFF in the normal clamped state (see seating verification below)
- Turbo Lock: ON, if the model has this feature and the added clamping force is required
Unclamp state — for pallet removal or installation:
- Unclamp: ON
- Z-Clean: ON
- Turbo Lock: OFF
Z-Clean blows debris off the Z reference surfaces before a new pallet seats. Machines also generally use Z-Clean to verify seating: the pallet closes the circuit at the Z air ports, and the machine monitors the pressure response to detect a pallet that is not seated flat. This requires the machine’s sensing circuit and operating sequence.
Turbo Lock is a separate circuit that adds clamping force while the pallet is clamped. It must be released before unclamping.
