8.0 System Maintenance Your MMD Series should be maintained by an authorized Starrett service representative. Annual verification, validation and calibration are recommended. 8.1 Preventive Maintenance Preventive maintenance includes activities you can perform annu- ally, monthly or daily to help ensure your MMD Series operates at its published specification for its intended applications. 8.1.1 Daily Maintenance Checklist Starrett recommends the following daily maintenance routines for your MMD Series.
8.1.4 Lubrication The ball screw and bearings should be lubricated every two (2) years depending on usage.
The lubricant must be a Lithium-based NLGI Grade 2 grease.
Starrett recommends Mobilith ® SHC220 or equivalent.
Ball screws should be greased through the ball nut fittings.
Rails can have a light coated in applied directly to the guides.
Your Starrett service representative will lubricate your system during an annual calibration and verification service call if needed or scheduled.
8.2 Maintenance Procedures The following are routine maintenance procedures that may be performed by the user or by a non-authorized Starrett representative. Starrett recommends that other types of maintenance procedures be performed by your Starrett service representative. 8.2.1 Travel Limits Both crosshead travel limits should be tested daily (minimally) or before each shift in a multi-shift plant operation. To test the upper switch, locate the switch so that the switch is about 25mm (1 inch) above the crosshead. Position the lower switch so that this switch is located about 25mm (1 inch) below the crosshead. Use the jog switch to manually move the crosshead upward. When it makes contact with the upper travel limit switch, the crosshead should stop and the up jog switch should be inactive. Press the jog switch down and the crosshead should travel down, away from the upper travel limit. Continue to press the down jog switch until the crosshead makes contact with the lower travel limit switch. Again, the crosshead should stop and the down jog switch should become inactive. Use the up jog switch to move the crosshead off the lower travel limit.
Check Daily
Description
1 2 3 4 5 6 7 8
Emergency Stop Operation Power Cord Connection Load Cell Sensor Connection
Travel Limits Operation
Test Fixture Alignment and Tightness
Signal Wire Connections between Components
Crosshead Travel in both Directions
Safety Shield Interlocks (if equipped with Safety Shield)
8.1.2 Authorized Field Maintenance Starrett recommends that you have your system maintained, at least annually, by your authorized Starrett representative. Your Starrett Service Representative will inspect, verify, calibrate and perform any necessary maintenance to ensure that your system operates safely and to its published specification. For information on Starrett Field Services, please contact your Starrett representative. 8.1.3 Cleaning Clean the surfaces of your MMD Series with a damp cloth. Never use abrasive cleaning products or products that can leave oily residue. Simply use a damp cloth to remove dust and dirt.
HAZARD If the crosshead does not stop when it makes contact with a travel limit switch, DISCONTINUE using the test frame. Contact your Starrett service representative for immediate service.
Use a cover to protect the test frame from dust when not in use.
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