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NEW! Variable Speed Positioning System (V.S.P.S.)
Joyce has expanded their control offerings to now include a programmable controller. The New Joyce Variable Speed Positioning System (V.S.P.S.) increases the capabilities of motorized jacks by allowing the operator to easily proram up to 10 stopping locations.
The VSPS includes a 2 Line HMI display with tactile feel push buttons used to control all aspects of system operation and programming. The display read-out indicates current position and preset stopping location. An enclosure mounted speed control dial allows real time speed control of the motorized jacks. The enclosure door also features an e-Stop push button and power-on indicator light to allow easy confirmation of the system's power status. A control pendant 4-pin connector is standard on all VSPS boxes. Joyce can provide a two button pendant to allow the oepartor to control the system away from the control box. The Joyce VSPS is designed to operate motors between 1/3 and 3 horsepower, and between 200 and 460 volt three phase power.
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Protective Bellows Boots for Screw Jacks
Protective bellows for translating design jacks protect the screw from dust and dirt, help maintain proper lubrication, and guard against moisture and corrosive contaminants. They are fabricated of neoprene-coated nylon. Other materials are available for applications involving temperatures below -40°F and above 500°F, highly corrosive atmospheres and other special conditions. Protective bellows boots for keyed for traveling nut (rotating screw) jacks can be ordered for upright and inverted models. Bellows boots are typically mounted between the traveling nut and jack and between the mounting structure and traveling nut.
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Motor Mounts and Stock Motors
For easy installation, Joyce 2, 3, 5, 10, 15 and 20 ton machine screw and ball screw jacks are available with motor mount adapters for standard NEMA C-Face motors. Joyce motor mounts allow direct coupling of the motor shaft with either the right or left side jack input shaft. All mounts come with necessary hardware and coupling keys. Motor mounts are available with NEMA C-Face motors. Unless otherwise specified, all standard motors are 3 phase, 230/460 VAC, 60 Hz, 1725 rpm. Contact us about motor mounts for other applications, including IEC, hydraulic and servo motor requirements.
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Motor Starters for Motorized Screw Jacks System
A Joyce motor starter is the heart of a basic control system for a motorized jack, actuator or ComDRIVE® system. It includes extend and retract push-buttons for momentary operation. A lighted power-on control lets operators easily determine if there is power to the system. Limit switch terminal connections are provided for high, emergency high, low and emergency low limits. Additional terminal connections for monitoring push-buttons and motor overload allow the Joyce motor starter to easily integrate with other control devices. Each Joyce motor starter model is perfectly matched to motors between 1/3 and 15 horsepower, and between 200 and 575 volt, three phase power requirements. IEC motor overload protection and a fusible disconnect guard against motor damage and short circuits. A NEMA 12 enclosure is standard, a NEMA 4 panel is optional. Other available options include a single phase control package, multiple motor control and alternate horsepower control.
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Encoders for Screw Jacks
Machine screw jack models between 2 and 150 ton capacity can be also equipped with an encoder to allow accurate position sensing within increments of .001". The encoder combines with your control system to monitor screw travel, number of revolutions and travel limits. Joyce's shaft-mounted encoder offers easy installation, proven reliability and virtually maintenance-free operation. It includes a six-pin electrical connector, worm shaft coupling and mounting adapter. Standard encoders are 200 pulses per revolution.
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Anti-Backlash Devices for Screw Jacks
Joyce Anti-backlash Devices compensate for thread wear to reduce screw endplay.
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Limit Switches on Screw Jacks and Actuators
Rugged Joyce limit switches allow you to set precise travel limits and stops on Joyce screw jacks and actuators. They are also ideal in any application where rotary motion of a machine component can be used to indicate linear motion of another part.
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Joyce Trunnions
Joyce trunnions are used in installations where the jack moves through an arc during operation. These jacks are often configured with motor mounts or as ComDRIVES. Trunnion adapter plates bolt to the jack flange and have precision bores for trunnion pins.
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Joyce Geared Potentiometers
Joyce geared potentiometers are ideal for applications where precise position must be known. Using a 10-turn potentiometer, a signal is provided as either a change in resistance or current (when supplied with a 4-20ma instrument transformer) which is proportional to the actual position of the screw. This signal is commonly used for applications where PLCs or computer control jacks. Geared potentiometers are available on worm gear design jacks of 2-150 ton capacity.
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Handwheels and Counters
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