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Model 751 Operation Guide

Air Filter: Check and clean/change as required. The frequency of cleaning/changing is dependent on environment and plant air system. Do not allow excess water to fill filter bowl. Installation Mounting: Mounting holes are located in the front and rear end caps. The use of ½” socket head cap screws is required. The Slide-A-Mark™ markers require a sturdy, level platform for mounting. Air Requirements: Compressed air is required on all Slide-A-Mark™ markers CMT recommends a ½” shop airline. Maximum operating pressure of 100 psi, minimum operating pressure of 25 psi. The marker has 3/8” NPT advance and retracting air ports. Adjustments: Increased pressure marks deeper. Decreased pressure marks lighter. To regulate marking pressure, adjust regulator on the FRL (Filter/Regulator/Lubricator unit). Sold separately. Maintenance Rod Orientation: All air and (electrical) power should be disconnected before adjusting the rod orientation, as well as any maintenance. The model 751 rod is keyed to maintain orientation. This radial orientation can be easily adjusted by loosening the front collar clamp (751-29) screw. Then rotate the rod to the desired orientation and retighten clamp collar. Do not over- tighten or the actuated marker will not fire. Pneumatic Controls Electrical Sequence for Spring Return Valve: Electrical Sequence for Double Solenoid Valves: To advance marker, energize solenoid “A”. To return marker and reset, de-energize solenoid “A” after part is marked. To advance marker, energize solenoid “A”. To return marker and reset, de- energize solenoid "A” and energize solenoid “B”. Note: The 751-E1 retract sensor indicates fully retracted position of the marker and may be used to de-energize solenoid “B”. Suggested Pneumatic Control Diagram
Marker Sol “A” Standard 4-Way Valve 1/2” Shop Air FRL Combo Unit Sol “B” 1/2” Tube “R” 1/2” Tube Lubrication: Add 10W "light" industrial hydraulic oil to lubricator bowl and adjust oil flow to approximately 1 drop for every 30-50 cycles. The Model 751-XX-XX-XX-NL is a non-lube system and does not require any lubrication.