Troubleshooting Positive Lock System, KF2 + KP

System

Problem

Solution

Positive Lock System, KF2 + KP

KF2 spring does not lock

Make sure the KF2 spring’s Air Port 4 has minimum 4 bar air pressure before press BDC.

Check that all hose connections are correct.

KF2 piston rod’s spring back is greater than 0 mm

Make sure the cartridge valve in the Valve Block is closed during the press’ down-stroke and that the KP-Passive Gas Spring is being stroked sufficiently for this application.

Make sure 100% of the KF2 spring’s nominal stroke length ±0.5 mm is used.

Check that the cartridge valve in the Valve Block opens at BDC.

KF2 piston rod does not return

Make sure the KF2 spring’s Air Port 4 has zero air pressure when required to open.

Check for any obstructions in the tool preventing piston rod return.

Check that there is gas pressure in the KF2 spring.