Belt Conveyor Protection Equipment
SPEED SWITCH

Speed ​​switch constantly monitor shaft speed of conveyors and machinery to detect and signal slippage or overspeed.

1. Detecting belt slippage can prevent conveyor fires and chute clogging.
    
2. Early detection of belt rupture minimizes chute clogging and cargo spillage.
    

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There are two types of Speed Switches. One is a one-push setting type and the other is an ultra-low speed rotation type. The characteristics of each are as follows.

<One-push setting type>

Proximity switches are used to measure speed without contact, and there are no consumables.

(Photo: ESPB-050)

<One-push setting type>

The one-push type automatically memorizes the number of revolutions just by pressing a button. If the speed drops by 5% or more from the memorized number of revolutions, it will be detected and notified. If necessary, you can freely change the setting value using the adjustment button.

<One-push setting type>

You can choose from four types according to installation environment.
Outdoor type, Separated proximity switch type, Transducer in-panel mounting type, Touch roller type

*Separatde type proximity switches can be extended up to 1km.

<Ultra-low speed rotation type>

An ultra-low speed rotation type that supports shaft speeds from 0.1 to 99.9 rpm is also available.

(Photo: ESKB-610M)

*For details, please refer to the instruction manual.

Non-contact measurement using a proximity switch.

A magnetic detection piece is attached to shaft of mechanical device, and a proximity switch is installed in front of the detection piece. As the shaft rotates, the detection piece passes in front of the proximity switch many times according to the rotation speed of the shaft. At this time, the proximity switch generates a pulse signal each time a piece of metal passes in front of it. The period of this pulse signal changes according to the rotation speed of the shaft, so the rotation speed can be measured.

ESKB-610M

Built-in encoder detects low-speed rotation with high accuracy

Rotation from shaft is transmitted to internal encoder. The encoder pulses the number of revolutions with a high accuracy of 200P/rev. The pulse signal is converted to the number of revolutions in the converter.
Even an ultra-low rotation speed of 0.1 rpm is detected in 6 seconds, so it will not be too late to respond.
Of course, we also support overspeed detection.

For proximity switches, find a spot on shaft where you can attach the sensing strip. If mounting position is narrow, select separated type. If touch roller method is selected, no detection piece is used. Please refer to the instruction manual for details.

 

Before installing Speed Switch, fix detection piece (40 mm or more in width) to  shaft by welding, etc. When attaching multiple detection pieces, place them evenly on the circumference. Also, keep the distance between the detection piece and the proximity switch within 18mm.
 

Wire power supply and contact output.

The number of revolutions is automatically memorized with just one push of a button. If speed drops by 5% or more from the memorized number of revolutions, it will be detected and notified.

If necessary, change setting value with adjustment button.

*For details, please refer to the instruction manual.

Install in a place where there is little impact or vibration.

Connect shaft on conveyor side and shaft of Speed Switch with a coupling or the like.
 

Wire power supply and contact output.

Switch to measurement mode with the MOD button and enter the number of revolutions with the INC button.

 

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＼ Down load or Request for quote ／