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Discussion in 'General Electronics Discussion' started by eduart, Sep 3, 2019.

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  1. eduart


    Sep 3, 2019
  2. 73's de Edd

    73's de Edd

    Aug 21, 2015
    Considerring that this generator is being used to feed an u/sonic transducer that is mounted to a cleaning tank.
    Is all of that cleaning tank or plate, being built up by a manufacturer and supplied to you or did you have to construct the cleaning tank and install the units u/sonic transducer ?
    I want to think that the problem is being related to the ultrasonic transducer and its coupling to the tank.
    Wondering if you are using enough cleaming fluid in the tank, to properly load the transducer.
    If you made the tank and installed the transduder, Is the transucer installed with a hard setting epoxy at the center of the bottom of the tank ?
    Is there any possibility of the transducer and its wiring being placed witin the liquid cleaning solution ?
    On the video demonstration, it appears that the transducer and its wiring cable passses down into the cleaning fliuid to a plate.
    That transducer is receiving a high voltage u/sonic signal to drive it, so no electrical leakage to or within the harness wiring via the cleaning fluid would be permissible.

    Using their instructions . . . . and MORE definitively , expressing the potential pitfalls.

    The ultrasonic generator can't power on under no-load condition
    DON'T power up the generator without the ultrasonic transducer BEING plugged in !

    After installed, we can not power on until lay cleaning fluid
    Also, be sure that there is ADEQUATE cleaning fluid in the tank ! And kept up to that use level while using .

    Ultrasonic transducer has two lugs.The positive one lay in the middle of two pieces of ceramic.The native one near lower metal column. Please do not make wrong when wiring.
    The positive polarity wire goes to the CENTER connector tab between the two sandwiched transducer elements .

    The larger side with screw hole in ceramic transducer which has a function of vibration,can be stuck in the bottom of cleaning machine.

    If the bottom of the transducer is mounted to a solid bottomplate for resting upon the work surface / table the , that mechanical damping / support backup will enhance vibrations.

    And please make sure the cleaning machine is safely grounding.
    You don't want that bath at 600-1000 v potential .

    The ceramic transducer should be pasted in the bottom of cleaning machine using transducer specialized glue or use AB glue stick. but the effect is a bit poor, or use epoxy resin with proportion of 10:4.
    You want a SOLID AND HARD coupling between the transducer and the tank / plate. Any elasticity of the bond materiel would be flexing and not giving FULL MECHANICAL transfer of the ultrasonic vibrations / power.

    The working circuit board voltage is 600V.The voltage output to the transducer is 1100 v.Please ensure the cleaning machine is safely grounding.
    A DOUBLE reminder / caution

    Please make sure leakage protect switch assembled on the power supply in order to ensure safety.
    Another safety feature, not to be ignored .

    Can you supply pics of the transducer installed on the cleaning tank ?
    Last edited: Sep 3, 2019
    davenn, hevans1944 and eduart like this.
  3. eduart


    Sep 3, 2019
    we bought this type of card and we want to build an ultrasound, (
    the board (pcb) fails after a couple of minutes, and 220V charge stops working
    the circuit works because if it is tested with a new card, it works only for a few minutes.
    the question is whether this type of card is designed to work continuously or only for a few seconds
    P.S. the card is cooled by a fan does not exceed 36C

    Attached Files:

  4. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    @eduart : read Edd's answers, specifically the first red line (but also the others).
  5. 73's de Edd

    73's de Edd

    Aug 21, 2015
    Sir eduart . . . . .

    Is that tank one that you specifically built up to use and is it being of the maximum volume ever needed?
    With no size referencing of known nearby objects except the wires . I see a damping of the potential transducer efgfectiveness, in the gauge of metal choice being too heavy and there is just a short distance from the bottom plates to the 4 right angle bends upward to make the sides. That makes for stopping the effective vibrational plate area by a transition to the stiff vertical planes of the sides of the container.
    Also is that rectangular container construction resting upon yet ANOTHER like gauge plate with a circular hole within its center.
    If so, that even FURTHER stiffens up the bottom and adds even more mass to the unit.

    Look at the floating transducer and visualize the unit attempting to try to vibrate the WHOLE metal housing construction , instead of JUST the center of the bottom plate (BEING PREFFERABLY, LESS STIFF ) that the transducer is mounted to.

    Since I can only make out certain aspects within that photo . . . . . and no can makee feelee- feelee-touchee-touchee .
    What is that vewy -vewy thin film of clear adhesive between the active end of the transducer and the driven bottom plate ?
    HOPEFULLY a HARD setting clear ? epoxy . . . . . and a final circular bead all the way around the outside rim of the transducer horn to the plate would help in preventing fracturing of the bond . . . . with extended time of use in the future.
    Also from a top view . . . . your liquid level is certainly adequate, but what is the mechanical abberation at the tanks bottoms, top left corner .
    Looks like a MIG's burn thru and a white silicone rubber patch up to fill in the hole ?

    If this was my system to correct in order to make it work better . I would be using a lighter gauge of metal (ss)
    That is of the gauge of a minimum of the thickness of a playing card on up to three cards thickness, considering that you have to work with existing on hand metal stock.

    73's de Edd . . . . .

    I chose the path less traveled by . . . . . but that was only because I was lost.

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