Load Limiter – Crane Anti-Collision – Electronic Crane Scale 

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Rotary Limit Switches

Base Rotary Limit Switch

Prod­uct description

The rotary limit switch is used to con­trol the move­ment of indus­trial machin­ery. It oper­ates as an aux­il­iary con­troller of elec­tri­cal motors through a power inter­face, such as a contactor

or PLC. Its shaft can be con­nected to the motor and, after a set num­ber of rev­o­lu­tions, the cams oper­ate the switches, thus start­ing the pre­de­ter­mined move­ment. A worm gear and a heli­cal toothed gear com­bined with one or more pairs of straight toothed gears are used for the trans­mis­sion of the move­ment from the input shaft to the out­put shaft.

Rev­o­lu­tion ratios rang­ing from 1:10 to 1:150 result from the use of dif­fer­ent com­bi­na­tions of gear wheels between the input shaft and the out­put shaft, which is con­nected to the cams oper­at­ing the switches.

Over­all dimen­sions are suit­able for assem­bly in nar­row spaces.  Trans­mis­sion and gear dri­ving shafts are made of stain­less steel to pre­vent oxi­da­tion and wear.

The gear wheels and the dri­ving bushes are made of self-lubricating techno-polymer mate­r­ial, suit­ably cho­sen to reduce the wear to a min­i­mum and to main­tain the accu­racy of the cou­plings over time.

Sin­tered bronze bushes are molded into the base of the limit switch to opti­mize the shaft rota­tion and to pre­vent rub­bing with plas­tic material.

Each cam can be set with great accu­racy thanks to the cam adjust­ing screws. The aux­il­iary switches are of the pos­i­tive open­ing type. The limit switch is avail­able with direct con­trol switches to oper­ate directly on the motor. Mate­ri­als and com­po­nents are wear resis­tant and pro­tect the equip­ment against water and dust. The limit switch can be cus­tomized with labels and colors.

Base is an electro­mechan­i­cal device for low-voltage con­trol cir­cuits (EN 60947–1, EN 60947–5-1) to be used as elec­tri­cal equip­ment of machines (EN 60204–1) in com­pli­ance with the fun­da­men­tal require­ments of the Low Volt­age Direc­tive 2006/95/CE and of the Machine Direc­tive 2006/42/CE.

Gen­eral Tech­ni­cal Specifications

  • Con­for­mity to Com­mu­nity Direc­tives: 2006/95/CE 2006/42/CERotary Limit Switch
  • Con­for­mity to Stan­dards:  EN 60204–1 EN 60947–1 EN 60947–5-1 EN 60529
  • Stor­age ambi­ent tem­per­a­ture: –40°C/+80°C
  • Oper­a­tional ambi­ent tem­per­a­ture: –40°C/+80°C
  • Pro­tec­tion degree:
    • IP 42
    • IP 67 (Tight­en­ing gasket)
  • Insu­la­tion cat­e­gory: Class II
  • Max­i­mum rota­tion speed: 800 rev./min.
  • Cable entry: Cable clamp M16
  • Mark­ings and homolo­ga­tions:

    CE

Tech­ni­cal Spec­i­fi­ca­tions of the Microswitches

  • Util­i­sa­tion cat­e­gory: AC 15

  • Rated oper­a­tional cur­rent: 3 A
  • Rated oper­a­tional volt­age: 250 V
  • Rated ther­mal cur­rent: 10 A
  • Rated insu­la­tion volt­age: 300 V~
  • Mechan­i­cal life: 1x106 operations
  • Ter­mi­nal ref­er­enc­ing: Accord­ing to EN 50013
  •  Con­nec­tions: 6.3 mm Fas­ton taps
  • Mark­ings and homologations:

CE & uLc

Rotary Switch Features

 

GF4C Rotary Limit Switch

  • GF4C Rotary Limit SwitchThe rotary limit switch is used to con­trol the move­ment of indus­trial machin­ery. It oper­ates as an aux­il­iary con­troller of elec­tri­cal motors through a power inter­face, such as a con­tac­tor or PLC. Suit­able for heavy duty, its shaft is con­nected to the motor and, after a set num­ber of rev­o­lu­tions, the cams oper­ate the switches, thus start­ing the pre­de­ter­mined move­ment. A worm gear and a heli­cal toothed gear com­bined with one or more pairs of straight toothed gears are used for the trans­mis­sion of the move­ment from the input shaft to the out­put shaft.
  • Rev­o­lu­tion ratios, rang­ing from 1:1 to 1:969, result from the use of dif­fer­ent com­bi­na­tions of gear wheels between the input shaft and the out­put shaft, which is con­nected to the cams oper­at­ing the switches. Trans­mis­sion and gear dri­ving shafts are made of stain­less steel to pre­vent oxi­da­tion and wear. The gear wheels and the dri­ving bushes are made of self-lubricating ther­mo­plas­tic mate­r­ial, suit­ably cho­sen to reduce the wear to a min­i­mum and to main­tain the accu­racy of the cou­plings over time. Sin­tered bronze bushes are molded into the base of the limit switch to opti­mize the shaft rota­tion and to pre­vent rub­bing with plas­tic material.
  • Each cam can be set with great accu­racy thanks to the cam adjust­ing screws. The aux­il­iary switches are of a pos­i­tive open­ing type, thus suit­able for safety func­tions. It is avail­able with direct con­trol switches for oper­at­ing directly on the motor. The cam-switch sets can be sub­sti­tuted for poten­tiome­ters suit­able for the con­nec­tion to elec­tronic equip­ment. Each out­put of the limit switch can be set with a dif­fer­ent rev­o­lu­tion ratio to allow for a diver­sifi ed con­trol of the machin­ery to meet spe­cial requirements.
  • Mate­ri­als and com­po­nents are wear resis­tant and pro­tect the equip­ment against water and dust. The limit switch is avail­able with a fl ange for direct cou­pling to the motor and it can be cus­tomized with labels and colours accord­ing to the customer’s require­mentsRotary Limit Switch Specifications.

GF4C Dimensions

GF4C DrawingsGF4C Spare PartsGF4C Spare PartsGF4C Request FormGF4C Use and Maintenance

 

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