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17 March, 2014

Elscint Frequency Controllers

Elscint has got three models of its Frequency Controllers, namely, EFQC6, EFQC4.5, EFQC3 & EFQC1.5. EFQC6 is suitable for large vibratory bowl feeders having VA rating of more than 1500 VA while EFQC4.5 is for smaller vibratory bowl feeders having VA Rating of upto 990 VA. EFQC3 is for vibrators of 380 VA Rating while very small vibrators upto 200 VA require EFQC1.5 Main features of these Frequency Controllers are –

  1. Frequency Adjustment – The major advantage of using a frequency controller is that one can adjust the output frequency of the controller to get the best resonant frequency at which vibratory feeder works best, eliminating the need for manually tuning the vibratory feeder.
  2. Automatic Voltage Regulation – This feature helps to eliminate the speed variation caused due to mains voltage fluctuation.
  3. Automatic Frequency  Adjustment  –  In  case  the  input  frequency  changes  (due  to  genset operation), the output frequency remains the same at the preset level.
  4. Maximum Output Voltage Adjustment – This provision helps to adjust the maximum output voltage, which in turn reduces chances of damage to a vibratory feeder.
  5. Overheat Protection – If the internal voltage in the controller increases, it switches off.
  6. Overload cut-off – In case the vibrator current increases its rated value, there is a provision of overload cut-off
  7. Provision of 1 sensor output is available in all these controllers
  8. Provision of remote control (through PLC) is available except for EFQC1.5

The technical specifications of these Frequency Controllers are given in the below chart –

 Particulars EFQC1.5 EFQC3 EFQC4.5 EFQC6
Input Voltage Range 220 V AC 220 V AC 220 V AC 220 V AC
Output Voltage Range 0 V to 260 V 0 V to 260 V 0 V to 240 V 0 V to 260 V
Output Frequency 40 Hz to 180 Hz 40 Hz to 180 Hz 5 Hz to 180 Hz 40 Hz to 180 Hz
Vibrator VA Rating Upto 200 VA 550 VA 990 VA 3000 VA
Voltage             Adjustment

Accuracy

1 V 1 V 1 V 1 V
Frequency         Adjustment

Accuracy

0.1 Hz 0.1 Hz 0.1 Hz 0.1 Hz
On / Off Delay – 2 sensors 0 to 20 sec 0 to 20 sec 0 to 20 sec 0 to 20 sec
PLC Control Start Stoppossible

from PLC

Variation          of

speed through PLC    possible with          0/10V-0/20mA input

Variation          of

speed through PLC    possible with          0/10V-0/20mA input

Variation          of

speed through PLC    possible with          0/10V-0/20mA input

Soft Stop Provision Available Available Available Available
Locking provision Possible Possible Possible Possible
Sensor PNP PNP PNP PNP
Amplitude Sensor

 

Not Possible in normal version but Version with Amplitude Sensor is available
Soft Start time 0 to 10 sec 0 to 10 sec 0 to 10 sec 0 to 10 sec
Display Digital LED Digital LED Digital LED Digital LED

Thus, the major advantages of using a Elscint Frequency Controller are –

  1. No variation in case of input frequency change (genset working)
  2. Mechanical Adjustment of the Vibratory Bowl Feeder / Linear Vibrator is not required
  3. The resonance frequency once determined remains stored even after the loss of power
  4. No need to change the coils / springs / vibrator in case of 50 Hz and 60 Hz input
  5. No variation in case of input voltage fluctuation
  6. It is Short Circuit Proof
  7. There being no Potentiometer on the Controller (there are up / down buttons), changes of any misuse is eliminated. Locking arrangement possible.
Monish Shet

Monish Shete is CEO of Elscint Automation, a 30 year old firm manufacturing vibratory bowl feeders and similar small part handing products. He personally has more than 25 years experience with last 15 years being with Elscint. This blog will help customers and laymen understand the intricacies of vibratory bowl feeders. One can find information about the finer aspects of vibratory bowl feeders which cannot be found anywhere else. Case studies and information about various innovative ways of feeding and orienting of different parts are given in this blog.


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