Limit switch reversal of travel

Be a great nano PLC control project + FWD-OFF-REV motor starter. Could count cycles and other thing then too. Maybe a Keyence or other NANO PLC.

Wanted: NE IN & Midwest Projects / Position (will consider other locations, full time or contract) Electrical / Electronic / Elec. - Mech. / Product / Manufacturing / TEST / SCADA / PLC / PBC /MES / Instrumentation & Controls / Automation, Production - Product Tracking PROJECTS or related POSITION Project Management, Design, Build, Procurement and Commissioning. Production / Maintenance / Product tracking and data collection / R&D By Time and Material, By the Job or as Employee Have Passport Will Travel DENNIS LEE McHENNEY (260)-347-9164 E-mail: snipped-for-privacy@mindspring.com

5 to 15 Years Experience in following AREAS · Testing, test system design, building, procurement, and commissioning, follow-up support and customer service. · Tough troubleshooting problems & Controls - Instrumentation UPGRADES, PID loops and control systems. · PLC, PC and SCADA (Supervisory Control and Data acquisition) systems. · TESTING: Motors, Gearmotors, PCB's, Electrical-Mechanical Parts, Aerospace (NASA TEST Facilities) and Automated Test Equipment (FUNCTIONAL, LIFE, ORT type TESTING). · MOTORS & Gearmotors: Subfractional - 5,000 HP, AC / DC / ECM · NO-Load, Loaded, dynamometer, Life, Lab, Production, ORT, Parts (Armature, Stator, Rotor), HI-POT, Surge. · PCB's: Design Prototype and TESTING. · Testers from low cost bench setups through multi-million dollar. · PLC's: GE Fanuc, AB-Rockwell, Modicon, TI, Keyence and Omron. · SCADA - HMI - MMI: CIMplicity and TRACKER / RCO's · Automatic Test Equipment: Meters, Scopes, Dynamometers, Noise & Vibration, HP-IB. · Conveyor and production Equipment Controls and Instrumentation, both new designs and upgrades. · Hazardous Location controls and instrumentation. · Project Management and costing. · Product engineering and support. · SPC, TQM, FMEA · Use AutoCad, MS Office Pro, CIMplicity, VB and many other software package s.

OPEN to any positions, first preference is NE Indiana, IN, MI, Midwest, SW, S, West and any U.S. I have extensive background in the electrical / mechanical areas as of Manufacturing / Test / Controls - Instrumentation / SCADA and product engineering work. Extensive hands on project management background. I worked my way up through the ranks being: Multicraft maintenance, A-B-C apprenticeship, Military Radar / Fire Control Equipment Tech, Electrician, Electronics Tech / R&D, MFG Eng. / TEST Eng. / Adv. MFG ENG. Senior Electrical Engineer (controls - instrumentation - HW - SW) Application Engineer / SCADA - HMI - PLC Corp MFG Engineer / Controls Engineer Electrical / Electronics Instructor

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Plastics, Automotive, Military, Aerospace, Motors / Gearmotors, PCB's, TESTING I worked my way up through the ranks, having first graduating 3 rd in my class in USA Hawk Missile service school in radar and fire control maintenance and obtaining a rank of E-5 in 2 years. When out of service I completed an A-B-C Multicraft factory maintenance apprenticeship and later became an Electrician and Instrumentation technician / troubleshooter for a

24 / 7 plastics operation.

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Noise and vibration testing and source identification. New / existing products and machine PM.

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Factory Controls, SCADA (Supervisory Control And Data Acquisition) and Instrumentation. PID and other controls work, Production tracking, error proofing and data logging.

You didn't mention any PLC control, so I take it that your systems is hard-wired. Without any detail of the travel limit switches available I would use these switches to switch a double pole relay to reverse the motor's direction. Another series-wired switch should kill the power to the whole system. This is the cheap solution.

An elegant solution would be to use a micro PLC like mentioned before. I also see these days that you get intelligent relays on the market, even a better solution from a cost point of view. Amongst others, try the Mitsubishi Alpha series or Moeller Easy relay and the cheapest I found is the FAB Giant relay.

Keep us posted.

When I've done this sort of thing (with DC motors) I set up my drive circuitry/software to only be able to stop or drive out of the limit switch, not drive in. This is fairly easy to do if your control circuit has a drive-in line and a drive-out line; you can do it with a few gates. Having no idea of what you're actually using to drive your stepper I can't say much more.