Limit Switches
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Limit Switches for Motorized Linear Stages Limit Switches are electro-mechanical devices that regulate the motion on positioning devices. On Velmex products they are primarily used to stop/turn off the motor when activated preventing over-travel of the carriage/slider. They also can be used to send an event signal. Velmex uses several different types. • Adjustable (moveable) limits, which are standard on BiSlide Assemblies and optional on XSlide and UniSlide Assemblies. • Fixed end of travel limits, which are standard on XSlide Assemblies and optional on UniSlide Assemblies. These are not adjustable. • Internal limits which are only available on the UniSlide MB90 Series. Diagram 1. Typical limit switch used by Velmex. The default mode is auto-detect normally closed switches. • Home switches, which actually reference a point rather than limit travel, are used on Rotary Tables and can be used on XSlide Assemblies. It is possible to purchase motor-driven Velmex stages without limits, however, it is not recommended and it may effect the warranty should you incur any damage. BiSlide® Limits Adjustable Limit Adjustable limits (Standard) - Velmex BiSlide Assemblies have two adjustable limit switches mounted in a track on the side rib of the assembly to prevent over-travel. An optional third limit switch can be added between the two standard limits and used as an adjustable home switch. (This would require a different controller.) BiSlide limit switches are referenced by either a “-21” or “-31” at the end of the model number. On Parallel-Coupled BiSlide Assemblies, the limits would be eliminated from one of the two linear stages that comprise the assembly. UniSlide® Limits Adjustable Limits (Optional) - Mounted on the side rib of Velmex UniSlide Assemblies, these two switches can be used to stop travel. These are ordered as a separate part number (OBLS). Adjustable Limit (with lock) Available on all UniSlide Series and UniSlide XY Tables. 7550 State Routes 5 & 20 Bloomfield, NY 14469-9389 www.velmex.com info@velmex.com Positioning Systems for Science and Industry Page 1 Document: Velmex Limit Switch

Adjustable Limit (with lock) UniSlide® Adjustable Limits (Continued) - The adjustable limits are located inside a rail that runs the length of the UniSlide® base. A 1/4” cam plate is added to the carriage/slide that depresses the cam when the carriage encounteres it and activates the switch. Thumb locks affix the limit in the proper position. Fixed, End of Travel Limit UniSlide Fixed, End-of-travel Limits (Optional) - These push button switches are fixed on the side rib of Velmex Unislide Assemblies. They are not adjustable. On all UniSlide Series except the MA15 and MA25 the limits are...

UniSlide® Limits (continued) Internal Limit Internal Limits (MB90 Only - Standard) - They consist of two switches, a control rod mounted along side the lead screw with two moveable brass collars and cover a top an additional 3” of dovetail base as shown. The collars are positioned on the control rod to activate the limits. The internal limits on the MA90 Series UniSlide Assembly are referenced by the letter “J” at the end. Brass Collar XSlide™ Limits Fixed Limits (Standard) - XSlide Assemblies have two fixed, end-of-travel limit switches built into the end plates. XSlide fixed limit...

XSlide™ Limits (continued) Magnetic Reed Home Switch (Optional) - A magnetic reed home switch sets a reference point to return the carriage to home (starting) position. This is moveable. Ordered as a separate part number (XSW-M). Commonly used on the XSlide™, a mechanical version is also available for BiSlide® and UniSlide® Assemblies. Mechanical home switches can be added to UniSlide and BiSlide linear stages. Switches used in this manner require an additional controller. Home Switch Rotary Table Limits/Home Switch Magnetic Home Switch (Optional) – A magnetic reed home switch sets and...

Limit Switch Wiring for VXM™ Controller ' Negative direction on VXM controllers Connector on Sullen Harness Amp1-480703-0 (mates with:1-480702-0) *Negative direction on VXM controllers Connector on Switch Harness are wired on the normally closed (NC) terminals. CAUTION: The VXM puts 24VDC on the limit switches. Do not connect limit inputs to any +5V logic devices. Velmex, Inc. 7550 State Routes 5 & 20 Bloomfield, NY 14469-9389 www.velmex.com info@velmex.com Positioning Systems for Science and Industry Page 5 Document: Velmex Limit Switches 01/16 Rev A

UniSlide® Assembly Adjustable Limits MOTOR PLATE SEARING SLOCK LIUllT SWITCH J L hi IT SWITCH VELMEX INC Velmex, Inc. 7550 State Routes 5 & 20 Bloomfield, NY 14469-9389 www.velmex.com info@velmex.com Positioning Systems for Science and Industry Document: Velmex Limit Switches

Assembly J - LIMIT SWITCH LIMIT SWITCH &R,a.CK£T Velmex /ME Velmex, Inc. 7550 State Routes 5 & 20 Bloomfield, NY 14469-9389 www.velmex.com info@velmex.com Positioning Systems for Science and Industry Document: Velmex Limit Switches