What causes fault code PAL-006 (Palletizer Gripper Release Failure)?

Vacuum release valve stuck — still holding suction. Clamp cylinder not retracting — air supply or valve issue. Release sensor not confirming open position. Product adhered to gripper surface — sticky or wet product. Blow-off air not functioning — vacuum needs positive break

How do I fix fault code PAL-006?

Check gripper release mechanism — vacuum blow-off or clamp retract. Verify solenoid valve for release — manual override test. Check blow-off air pressure — should be sufficient to break vacuum seal. Clean gripper contact surfaces — remove product residue. Inspect release position sensors — clean and adjust. If vacuum system, verify blow-off timer is long enough

Palletizer Gripper Release Failure

PAL-006

Palletizer gripper or clamp did not release product at the placement position. Product still held after release command.

medium palletizer

palletizer gripper release vacuum clamp

Probable Causes (ranked)

Vacuum release valve stuck — still holding suction
Clamp cylinder not retracting — air supply or valve issue
Release sensor not confirming open position
Product adhered to gripper surface — sticky or wet product
Blow-off air not functioning — vacuum needs positive break

Fix Steps

1 Check gripper release mechanism — vacuum blow-off or clamp retract
2 Verify solenoid valve for release — manual override test
3 Check blow-off air pressure — should be sufficient to break vacuum seal
4 Clean gripper contact surfaces — remove product residue
5 Inspect release position sensors — clean and adjust
6 If vacuum system, verify blow-off timer is long enough

Field Trick

If vacuum grippers don't release, the blow-off isn't strong enough. Increase blow-off duration by 0.1 second at a time until release is clean.

Suggested Replacement Parts

Parts matched to fault category: Solenoid Valve

SMC SY3120 Solenoid Valve P/N: SY3120-5LZD-M5 5/2 way, 24VDC, M5 ports, direct piping, 0.15-0.7 MPa

AutomationDirect $32.00 Amazon $28.00 McMaster-Carr $45.00 Grainger $42.00

Festo VUVG Solenoid Valve P/N: VUVG-LK14-M52-AT-G18-1R8L 5/2 way, 24VDC, G1/8 ports, spring return

AutomationDirect $55.00 Amazon $62.00 Grainger $70.00

Air Pressure Regulator + Filter Combo P/N: AW30-03BG SMC AW series, 3/8 NPT, 5-125 PSI, with gauge and bowl guard

AutomationDirect $38.00 Amazon $32.00 McMaster-Carr $48.00

Prices are estimates. Verify part numbers match your equipment before ordering.

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