6.0 Using Your MMD Series Test Frame Detailed instructions for using your MMD Series tester are included in the User Guides for the L3 Series Material Test software, L2 Plus Force Analysis software, or the L2 Series Force Measurement software. Included in the following paragraphs are basic instructions for some of the key operating functions of your system. 6.1 System Settings Options The following are basis setup instructions for your MMD Series test frames. Many of these settings may be performed using L2, L2 Plus or L3 Series software. 6.1.1 Setting Crosshead Travel Limits Crosshead travel limits are used to prevent over-travel conditions that can lead to load cell sensor damage or damage to your test fixture. Two magnetic travel limits are located on your MMD Series test frame. One switch is used to prevent crosshead movement upward beyond the location of this limit. The other limit is to prevent crosshead movement downward beyond the location of this limit. The crosshead limits slide up/down and feature a magnetic sensor that senses when the crosshead is at a position equal to the switch position. When the switch senses the crosshead position, the crosshead stops. The jog switch will only allow operation away from the travel limit location, e.g. if moving up when the switch was activated, only the jog down direction is enabled.
The Travel Range is established between the two Travel Limits. The crosshead will automatically stop when it reaches a travel limit.
CAUTION ALWAYS set the travel limits so that the total travel range fits the grip string and the maximum travel expected for the test. CAUTION The bottom travel limit should take into consideration operator safety. This limit should be set to prevent pinch hazards. WARNING NEVER reach within, or place any of your body within the travel range when the crosshead is moving.
Bottom Limit Switch
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