EXAMPLES OF MAGNETIZATION SETTINGS FOR ELECTROMAGNETIC CHUCKS
Before setting the magnetization it is always necessary to check that the correct type of electromagnet is set in MENU 4 – ELECTROMAGNET TYPE – electromagnetic chuck.
Standard electromagnetic chucks require a continuous power supply throughout the magnetization process. Electro-permanent chucks are magnetized by a short electrical pulse (approximately 1 sec). Longer magnetization times can damage the electro-permanent chuck.
EXAMPLE 1: Magnetization settings for an electromagnetic chuck
Maximum Voltage – output voltage level for potentiometer P1 in the rightmost position.
Minimum Voltage – output voltage level for potentiometer P1 in the leftmost position.
Magnetization Time and Delay – this parameters are not used in case of electromagnetic chuck. The magnetization time starts by pressing the MAG button and ends by pressing the DEM button on the control box.
Number of Pulse Series – for electromagnetic chucks this value is not important – it is not used.
Active Outputs – defines which outputs (DC OUT1-6) of the control unit will be used during the magnetizing process.
In this case, the control unit will perform magnetization only on the DC OUT1 output. The maximum output voltage is limited to 60 % in this case. The minimum output voltage is limited to 5 % in this case. When the input voltage of the control unit is 230 V AC and the potentiometer P1 is turned to the rightmost position, the output voltage of the control unit will be approximately 115 V DC. When the potentiometer P1 is turned to the leftmost position, the output voltage of the control unit will be approximately 10 V DC.
EXAMPLE 2: Magnetization settings for an electromagnetic chucks
The control unit configured in this way performs magnetization on the DC OUT1 and DC OUT2 outputs.
All the other parameters are the same as in Example 1.
!!! Important notice !!!
All changed parameters must be saved immediately in MENU 8 – LOAD/SAVE DATA – Save Current Settings.
EXAMPLES OF MAGNETIZATION SETTINGS FOR ELECTRO-PERMANENT CHUCKS
Before setting the magnetization it is always necessary to check that the correct type of electromagnet is set in MENU 4 – ELECTROMAGNET TYPE – electro-permanent chuck.
Incorrect setting of the electromagnet type can cause not only irreversible damage to the control unit, but also damage to the connected electro-permanent chuck.
Magnetization of electro-permanent chucks is performed by one or several short electrical pulses.
EXAMPLE 3: Magnetization settings for electro-permanent chuck – 1 pulse
Set up in this way, the control unit performs magnetization of the electro-permanent chuck with a single electrical pulse of 750 ms. The output voltage is regulated by potentiometer P1 on the control box. In the rightmost position of potentiometer P1, the control unit output will be at maximum voltage (100%). In the leftmost position of potentiometer P1, the control unit output will be at a voltage corresponding to 20% of the input AC supply voltage. The control unit will perform a magnetizing cycle only at the DC OUT1 output.
Time t1 – this time is set by the manufacturer in MENU 12 – SERVICE SETTINGS and the user is not allowed to change this parameter – it is the time of switching ON/OFF of the contactors.
Time t2 – the magnetization time is set by the customer or supplier according to the type of electro-permanent chuck.
Time t3 – magnetization delay is used when more than one series of pulses is used for magnetization.
EXAMPLE 4: Magnetization settings for electro-permanent chuck – 2 pulses
Set in this way, the control unit performs magnetization of the electro-permanent chuck with two electrical pulses of 750 ms. The output voltage is regulated by potentiometer P1 on the control box in the range of 20-100%. Only the DC OUT1 is active.
EXAMPLE 5: Magnetization settings for electro-permanent chuck with 2 windings
Set up in this way, the control unit performs magnetization of the electro-permanent chuck with a single electrical pulse of 750 ms. The output voltage is regulated by potentiometer P1 on the control box in the range of 20-100%.
The control unit performs a magnetizing cycle on the DC OUT1 and DC OUT2 outputs.