Applies to: Forney FHS Series Compression Testing Machines (Forney High-Stiffness Frames) equipped with Overtravel Limit Protection.
Overview:
The Overtravel Limit Protection feature is designed to prevent overextension of the compression ram and protect both the machine and test specimens. Proper configuration of the software setting and accurate installation of the proximity sensor are critical for this protection to function as intended.
This guide outlines how to verify the Overtravel Limit setting and inspect the proximity sensor for correct placement and operation.
1. Verify Overtravel Limit Setting in Machine Software
To ensure the Overtravel Limit feature is active:
-
Navigate to the machine's Settings screen via the touchscreen interface.
-
Locate the setting labeled “Overtravel Limit Protection”.
-
Ensure the checkbox is enabled (checked).
Refer to the attached image for visual guidance.
2. Inspect Proximity Sensor Placement
The proximity sensor (Forney Part #: TM-6324-05 / PROX SWITCH) plays a key role in triggering the Overtravel Limit stop.
To inspect:
Step 1: Remove the upper debris guard to gain access to the sensor location.
Step 2: Visually inspect the proximity sensor inside the frame.
Take the following photos to assist in remote support or verification:
-
A full view of the frame showing both interior and exterior sides of the proximity switch
-
A close-up interior photo showing the sensor protruding through the inside wall of the frame (should extend into the test chamber by approximately 1mm)
-
A close-up exterior photo showing the proximity switch housing on the outside of the frame
3. Reference Images
4. Important Notes on Testing Functionality
-
For the Overtravel Limit Protection to function correctly, both debris guards must be in place after inspection is complete.
-
If new debris guards are being installed, functionality should be tested after replacements are in place to ensure unobstructed sensor operation.
-
Once setup is confirmed, Forney Support can assist with running a test cycle to verify protection is triggering as expected.
Need Help?
If you have any questions or would like help verifying your setup, please contact Forney Support and share your photos and findings. We’ll be happy to guide you through the process.